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Overview
Comment:Update this project to versino 3.26.0.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1:41612ba03b3c045f9910ef4716e703c11ead0152
User & Date: dan 2018-12-01 13:44:42
Context
2019-01-22
17:37
Change the STL used by this project from "stlport_static" to "c++_static". stlport_static is no longer supported. check-in: 07738ecfc7 user: dan tags: trunk
2018-12-01
13:44
Update this project to versino 3.26.0. check-in: 41612ba03b user: dan tags: trunk
2018-11-05
20:54
Update this project to SQLite version 3.25.3. check-in: 317855cf62 user: dan tags: trunk
Changes
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Changes to sqlite3/src/main/jni/sqlite/sqlite3.c.

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94683
94684
94685
94686
.....
94762
94763
94764
94765
94766
94767
94768
94769
94770
94771
94772
94773
94774
94775
94776
.....
94806
94807
94808
94809
94810
94811
94812
94813
94814
94815
94816
94817
94818
94819
94820
94821
94822
.....
94890
94891
94892
94893
94894
94895
94896









94897
94898
94899
94900
94901
94902
94903
94904
94905
94906
94907
94908
94909
94910
94911
94912
94913
94914
94915
94916
94917
94918
94919
94920
94921
94922
94923
.....
94939
94940
94941
94942
94943
94944
94945
94946
94947
94948
94949
94950
94951
94952
94953
94954
94955
94956
94957
94958
94959
94960
94961
94962
94963
94964
94965
94966
94967
94968
94969
94970
94971
94972
.....
95381
95382
95383
95384
95385
95386
95387
95388
95389
95390
95391
95392
95393
95394
95395
95396
95397
95398
95399
95400
95401
.....
95850
95851
95852
95853
95854
95855
95856
95857
95858
95859
95860
95861
95862
95863
95864
95865
.....
95935
95936
95937
95938
95939
95940
95941
95942
95943
95944
95945
95946
95947
95948
95949
95950
95951
95952
95953
95954
95955
.....
96844
96845
96846
96847
96848
96849
96850




96851
96852
96853
96854
96855
96856
96857
.....
96862
96863
96864
96865
96866
96867
96868
96869

96870
96871
96872
96873
96874
96875
96876
96877
.....
96927
96928
96929
96930
96931
96932
96933
96934
96935
96936
96937
96938
96939
96940
96941
.....
96954
96955
96956
96957
96958
96959
96960
96961
96962
96963
96964
96965
96966
96967
96968
.....
97057
97058
97059
97060
97061
97062
97063

97064
97065
97066
97067
97068
97069
97070
97071
97072
97073
97074
97075
97076
97077

97078
97079




97080
97081
97082
97083
97084
97085
97086
97087
97088
97089
97090
97091
97092
97093
97094
97095
97096
97097
97098
97099
97100
.....
97881
97882
97883
97884
97885
97886
97887
97888
97889
97890
97891
97892
97893
97894
97895
97896
.....
97937
97938
97939
97940
97941
97942
97943








97944
97945
97946
97947
97948
97949
97950
.....
99170
99171
99172
99173
99174
99175
99176
99177
99178
99179
99180
99181
99182
99183
99184
.....
99194
99195
99196
99197
99198
99199
99200
99201
99202
99203
99204
99205
99206
99207
99208
.....
99408
99409
99410
99411
99412
99413
99414
99415
99416
99417
99418
99419
99420
99421
99422
99423
.....
99652
99653
99654
99655
99656
99657
99658
99659
99660
99661
99662
99663
99664
99665
99666
99667
99668
99669
99670
99671
99672
99673
99674
99675
99676
99677
......
100514
100515
100516
100517
100518
100519
100520














100521
100522
100523
100524
100525
100526
100527
......
100533
100534
100535
100536
100537
100538
100539
100540
100541
100542
100543
100544
100545
100546
100547
100548
100549
100550
100551
100552
100553
100554
100555
100556
100557
100558
100559
100560
100561
......
100688
100689
100690
100691
100692
100693
100694
100695
100696
100697
100698
100699
100700
100701
100702
100703
......
100920
100921
100922
100923
100924
100925
100926
100927
100928
100929
100930
100931
100932
100933
100934
......
101803
101804
101805
101806
101807
101808
101809
101810
101811
101812
101813






101814
101815
101816
101817
101818
101819
101820
......
101939
101940
101941
101942
101943
101944
101945
101946
101947
101948
101949
101950
101951
101952
101953
......
102197
102198
102199
102200
102201
102202
102203




102204

102205
102206
102207
102208
102209
102210
102211
102212
102213
......
102313
102314
102315
102316
102317
102318
102319
102320
102321
102322
102323
102324
102325
102326
102327
102328
102329
102330
102331
102332
102333
102334
102335
......
102477
102478
102479
102480
102481
102482
102483
102484
102485
102486
102487
102488
102489
102490
102491
102492
......
102575
102576
102577
102578
102579
102580
102581
102582
102583
102584
102585
102586
102587
102588
102589
......
102729
102730
102731
102732
102733
102734
102735
102736
102737
102738
102739
102740
102741
102742
102743
102744
102745
......
104780
104781
104782
104783
104784
104785
104786
104787
104788
104789
104790
104791
104792
104793
104794
......
105460
105461
105462
105463
105464
105465
105466

105467
105468
105469
105470
105471
105472
105473
......
105516
105517
105518
105519
105520
105521
105522

105523
105524
105525
105526
105527
105528
105529
......
105939
105940
105941
105942
105943
105944
105945
105946
105947
105948
105949
105950
105951
105952
105953
105954
105955
105956
105957
105958
105959
105960
105961
105962
105963
......
106129
106130
106131
106132
106133
106134
106135
106136
106137
106138
106139

106140



106141
106142
106143
106144
106145

106146

106147
106148
106149
106150
106151
106152
106153
......
106216
106217
106218
106219
106220
106221
106222






106223
106224
106225
106226
106227
106228
106229
......
106373
106374
106375
106376
106377
106378
106379














106380
106381
106382
106383
106384
106385
106386
106387
106388
106389
106390
106391
106392
106393
106394
106395
106396
106397
......
107459
107460
107461
107462
107463
107464
107465






























107466
107467
107468
107469
107470
107471
107472
......
107497
107498
107499
107500
107501
107502
107503




107504
107505
107506
107507
107508
107509
107510
......
108005
108006
108007
108008
108009
108010
108011
108012
108013
108014
108015
108016
108017
108018
108019
......
110460
110461
110462
110463
110464
110465
110466















110467
110468
110469
110470
110471
110472
110473
110474
110475
110476
110477
110478
110479
110480
110481
110482
110483
110484
110485
110486
110487
......
110552
110553
110554
110555
110556
110557
110558
110559
110560
110561
110562
110563
110564
110565
110566
......
110699
110700
110701
110702
110703
110704
110705

































110706
110707
110708
110709
110710
110711
110712
110713
110714
110715
110716
110717
110718
110719
110720
110721
110722
110723
110724
110725
110726
110727
110728
110729
110730
110731
110732
110733
110734
110735
110736
110737
110738
110739
......
114129
114130
114131
114132
114133
114134
114135
114136
114137
114138
114139
114140
114141
114142
114143
......
115205
115206
115207
115208
115209
115210
115211

115212
115213
115214
115215
115216
115217
115218
115219
......
116185
116186
116187
116188
116189
116190
116191
116192

116193
116194
116195
116196
116197
116198
116199
116200
116201
116202
116203
116204
116205
116206
......
116214
116215
116216
116217
116218
116219
116220
116221
116222
116223
116224





116225
116226





116227
116228
116229
116230
116231
116232
116233
......
116234
116235
116236
116237
116238
116239
116240
116241
116242
116243
116244
116245
116246
116247
116248
......
116440
116441
116442
116443
116444
116445
116446
116447






116448
116449
116450
116451
116452
116453
116454
......
117941
117942
117943
117944
117945
117946
117947

117948
117949
117950
117951
117952
117953


117954
117955
117956
117957
117958
117959
117960
......
118234
118235
118236
118237
118238
118239
118240


118241
118242
118243
118244
118245
118246
118247
......
118322
118323
118324
118325
118326
118327
118328

118329
118330
118331
118332
118333
118334
118335
......
118689
118690
118691
118692
118693
118694
118695
118696






118697
118698
118699
118700
118701
118702
118703
......
119139
119140
119141
119142
119143
119144
119145
119146
119147
119148
119149
119150
119151
119152
119153
119154
119155
119156
......
119159
119160
119161
119162
119163
119164
119165
119166
119167
119168
119169
119170
119171
119172
119173
119174
119175
119176
119177
119178
119179
119180

119181
119182
119183
119184
119185
119186
119187
119188
119189
119190
119191
119192
119193
119194
119195
119196
119197
119198
119199
119200

119201
119202
119203
119204

119205
119206
119207
119208
119209


119210
119211
119212
119213
119214
119215
119216
119217
119218
119219
119220
119221
119222
119223
119224
119225
119226
119227
119228
119229
119230
119231
119232
119233
119234
......
119256
119257
119258
119259
119260
119261
119262
119263
119264
119265
119266
119267
119268
119269
119270
......
119293
119294
119295
119296
119297
119298
119299
119300
119301
119302
119303
119304
119305
119306
119307
......
119328
119329
119330
119331
119332
119333
119334
119335
119336
119337
119338
119339
119340
119341
119342
119343
119344
119345
119346
119347
119348
119349
......
119365
119366
119367
119368
119369
119370
119371
119372
119373
119374
119375
119376
119377
119378
119379
119380
119381
119382
119383
119384
119385
119386
......
119408
119409
119410
119411
119412
119413
119414
119415
119416
119417
119418
119419
119420
119421
119422
119423
119424
119425
119426
119427
119428
119429
119430
119431
119432
119433
119434
119435
119436
......
119444
119445
119446
119447
119448
119449
119450
119451
119452
119453
119454
119455
119456
119457
119458
119459
119460
119461
119462
119463
......
119506
119507
119508
119509
119510
119511
119512
119513
119514
119515
119516
119517
119518
119519
119520
......
119532
119533
119534
119535
119536
119537
119538
119539
119540
119541
119542
119543
119544
119545
119546
......
119565
119566
119567
119568
119569
119570
119571
119572
119573
119574
119575
119576
119577
119578
119579
......
119596
119597
119598
119599
119600
119601
119602
119603
119604
119605
119606
119607
119608
119609
119610
119611
119612
119613
......
119652
119653
119654
119655
119656
119657
119658
119659
119660
119661
119662
119663
119664
119665
119666
119667
119668
119669
119670
119671
119672
119673
119674





119675
119676
119677
119678
119679
119680
119681
119682
119683
119684
119685
119686












119687
119688
119689
119690
119691
119692
119693
......
119731
119732
119733
119734
119735
119736
119737
119738
119739
119740
119741
119742
119743
119744
119745
119746
119747
119748
119749
119750
119751
119752
119753
119754
119755
119756
......
120754
120755
120756
120757
120758
120759
120760
120761
120762
120763
120764
120765
120766
120767
120768
......
120803
120804
120805
120806
120807
120808
120809

120810
120811
120812
120813
120814
120815
120816
120817
120818

120819
120820
120821
120822
120823
120824
120825
120826
120827
120828
120829
120830
120831
120832
120833
120834
120835
120836

120837
120838
120839
120840
120841
120842
120843
......
120867
120868
120869
120870
120871
120872
120873

120874
120875
120876
120877
120878
120879
120880
120881
120882
120883
120884
120885
120886
120887
120888
120889
120890
120891
120892
120893
......
120903
120904
120905
120906
120907
120908
120909

120910
120911
120912
120913
120914
120915
120916
120917
120918
......
120951
120952
120953
120954
120955
120956
120957

120958
120959
120960
120961
120962
120963
120964
......
120992
120993
120994
120995
120996
120997
120998

120999
121000
121001
121002
121003
121004
121005
121006
121007
121008
......
121039
121040
121041
121042
121043
121044
121045
121046
121047
121048

121049
121050
121051
121052
121053
121054
121055
121056


121057
121058
121059
121060
121061
121062
121063
121064
121065
121066
121067
121068
121069
121070
121071
121072
121073
121074
121075
121076
121077
121078
......
121833
121834
121835
121836
121837
121838
121839









121840



121841
121842


121843
121844
121845

121846
121847
121848
121849
121850
121851
121852
121853
121854
121855
121856
121857
121858
121859
121860
121861
121862
121863
121864
......
122180
122181
122182
122183
122184
122185
122186
122187

122188
122189
122190
122191
122192
122193
122194
......
122533
122534
122535
122536
122537
122538
122539
122540
122541
122542
122543
122544
122545
122546
122547
122548
......
122915
122916
122917
122918
122919
122920
122921
































































































































































































































































































122922
122923
122924
122925
122926
122927
122928
......
123927
123928
123929
123930
123931
123932
123933
123934
123935
123936
123937
123938
123939
123940
123941
......
123950
123951
123952
123953
123954
123955
123956
123957
123958
123959
123960
123961
123962
123963
123964
123965
123966
123967
123968
123969
......
124804
124805
124806
124807
124808
124809
124810
124811
124812
124813
124814
124815
124816
124817
124818
......
124989
124990
124991
124992
124993
124994
124995
124996
124997
124998
124999
125000
125001
125002
125003
125004
125005
125006
125007
125008
125009
125010
125011
......
125088
125089
125090
125091
125092
125093
125094
125095
125096
125097
125098
125099
125100
125101
125102
......
131212
131213
131214
131215
131216
131217
131218



















































131219
131220
131221
131222
131223
131224
131225
......
131436
131437
131438
131439
131440
131441
131442
131443
131444
131445
131446
131447
131448


131449
131450
131451
131452
131453
131454
131455
131456
131457
131458
131459
131460
131461
131462
......
132498
132499
132500
132501
132502
132503
132504
132505

132506
132507
132508
132509
132510
132511
132512
......
133040
133041
133042
133043
133044
133045
133046
133047
133048
133049
133050
133051
133052
133053
133054
133055
133056
133057
133058
133059
133060
133061
133062
133063
133064
133065
......
133071
133072
133073
133074
133075
133076
133077


133078
133079
133080
133081
133082
133083
133084
......
133765
133766
133767
133768
133769
133770
133771
133772
133773
133774
133775
133776
133777
133778
133779
......
134385
134386
134387
134388
134389
134390
134391

134392
134393
134394
134395
134396




















134397
134398
134399
134400
134401
134402
134403
......
135644
135645
135646
135647
135648
135649
135650
135651
135652
135653
135654
135655
135656
135657
135658
......
137044
137045
137046
137047
137048
137049
137050
137051
137052
137053
137054
137055
137056
137057
137058
......
137145
137146
137147
137148
137149
137150
137151
137152
137153
137154
137155
137156
137157
137158
137159
......
137167
137168
137169
137170
137171
137172
137173
137174
137175
137176
137177
137178
137179
137180
137181
137182
137183
137184
137185
137186
......
137190
137191
137192
137193
137194
137195
137196
137197
137198
137199
137200
137201
137202
137203
137204
137205
137206
137207
......
138337
138338
138339
138340
138341
138342
138343

138344
138345
138346
138347
138348
138349
138350
138351
138352
138353
138354
138355
138356

138357
138358
138359
138360
138361
138362
138363
......
139212
139213
139214
139215
139216
139217
139218
139219
139220
139221
139222
139223
139224
139225
139226
......
139390
139391
139392
139393
139394
139395
139396
139397
139398
139399


139400
139401
139402
139403
139404
139405
139406
139407
139408
139409
139410
139411
139412
139413
139414
139415
139416
139417
139418
139419
139420
139421
139422
139423
139424
139425
139426
139427
139428
139429
139430
139431
139432
139433
139434
139435
139436
139437
139438
139439
139440
139441
139442
139443
......
140483
140484
140485
140486
140487
140488
140489








140490
140491
140492
140493
140494
140495
140496
......
141494
141495
141496
141497
141498
141499
141500









141501

141502
141503
141504
141505
141506
141507
141508
......
141890
141891
141892
141893
141894
141895
141896

141897
141898
141899

141900
141901
141902
141903
141904
141905
141906
......
141918
141919
141920
141921
141922
141923
141924
141925








141926
141927
141928
141929
141930
141931
141932
......
144300
144301
144302
144303
144304
144305
144306
144307
144308
144309
144310
144311
144312
144313
144314
144315
144316
144317
144318
144319
......
144422
144423
144424
144425
144426
144427
144428
144429
144430
144431
144432
144433
144434
144435
144436
......
144635
144636
144637
144638
144639
144640
144641

144642
144643
144644
144645
144646

144647
144648
144649
144650
144651
144652
144653
......
145802
145803
145804
145805
145806
145807
145808
145809
145810
145811
145812
145813
145814
145815
145816
......
145954
145955
145956
145957
145958
145959
145960

145961
145962
145963
145964
145965
145966
145967
......
146055
146056
146057
146058
146059
146060
146061
146062
146063
146064
146065
146066
146067
146068
146069
146070
146071
146072
146073
146074
146075
......
150253
150254
150255
150256
150257
150258
150259
150260
150261
150262
150263
150264
150265
150266
150267
150268
150269
150270
......
151223
151224
151225
151226
151227
151228
151229



































































151230
151231
151232
151233
151234
151235
151236
......
152620
152621
152622
152623
152624
152625
152626

152627
152628
152629
152630
152631
152632
152633
......
154847
154848
154849
154850
154851
154852
154853



154854
154855
154856
154857
154858
154859
154860
......
155734
155735
155736
155737
155738
155739
155740
155741
155742
155743
155744
155745
155746
155747
155748












155749
155750
155751
155752
155753
155754
155755
......
161209
161210
161211
161212
161213
161214
161215
161216















161217
161218
161219
161220
161221
161222
161223
161224
161225
......
161234
161235
161236
161237
161238
161239
161240

161241
161242
161243
161244
161245
161246
161247
......
161514
161515
161516
161517
161518
161519
161520

161521
161522
161523
161524
161525
161526
161527
......
161617
161618
161619
161620
161621
161622
161623

161624
161625
161626
161627
161628
161629
161630
......
163865
163866
163867
163868
163869
163870
163871
163872

163873
163874
163875
163876
163877
163878
163879
......
167424
167425
167426
167427
167428
167429
167430
167431

167432
167433
167434
167435
167436
167437
167438
......
177601
177602
177603
177604
177605
177606
177607



177608
177609
177610
177611
177612
177613
177614
......
177858
177859
177860
177861
177862
177863
177864
177865
177866
177867

177868
177869



177870

177871
177872






177873

177874
177875
177876
177877
177878


177879
177880
177881









177882
177883
177884
177885

177886
177887
177888

177889
177890

177891
177892
177893
177894
177895
177896
177897
177898
177899
177900
......
177995
177996
177997
177998
177999
178000
178001
178002

178003
178004
178005
178006
178007
178008
178009
......
178022
178023
178024
178025
178026
178027
178028
178029

178030
178031
178032
178033
178034
178035
178036
......
181452
181453
181454
181455
181456
181457
181458
















181459
181460
181461
181462
181463
181464
181465
181466
181467
......
181476
181477
181478
181479
181480
181481
181482

181483
181484
181485
181486
181487
181488
181489
......
182466
182467
182468
182469
182470
182471
182472





182473
182474
182475
182476
182477
182478
182479





182480
182481
182482
182483
182484
182485
182486
......
182498
182499
182500
182501
182502
182503
182504
182505
182506
182507
182508
182509
182510
182511
182512
......
182518
182519
182520
182521
182522
182523
182524
182525
182526
182527
182528
182529
182530
182531
182532
......
182540
182541
182542
182543
182544
182545
182546








182547


182548
182549
182550
182551
182552
182553
182554
......
182598
182599
182600
182601
182602
182603
182604
182605
182606
182607
182608
182609
182610
182611
182612
182613
182614
182615
182616
182617
......
182805
182806
182807
182808
182809
182810
182811





















182812
182813
182814
182815
182816
182817
182818
......
182821
182822
182823
182824
182825
182826
182827
182828

























182829
182830
182831
182832
182833







182834
182835
182836
182837

182838

182839
182840
182841


























































182842
182843
182844
182845
182846
182847
182848
......
182880
182881
182882
182883
182884
182885
182886
182887
182888
182889
182890
182891
182892
182893
182894
......
183908
183909
183910
183911
183912
183913
183914







183915


183916
183917
183918
183919
183920
183921
183922
......
183952
183953
183954
183955
183956
183957
183958
183959
183960
183961
183962
183963
183964
183965
183966
......
183975
183976
183977
183978
183979
183980
183981

183982
183983
183984
183985
183986
183987
183988

183989
183990
183991
183992
183993
183994
183995
183996
183997
183998
183999
184000


184001
184002
184003
184004
184005
184006
184007
184008
184009
184010

184011
184012
184013
184014
184015
184016
184017
184018
184019
......
186032
186033
186034
186035
186036
186037
186038
186039

186040
186041
186042
186043
186044
186045
186046
......
186061
186062
186063
186064
186065
186066
186067

186068
186069
186070
186071
186072
186073
186074
......
189656
189657
189658
189659
189660
189661
189662































































189663
189664
189665
189666
189667
189668
189669
......
189674
189675
189676
189677
189678
189679
189680
189681
189682
189683
189684
189685
189686
189687
189688
189689
189690
189691

189692
189693
189694
189695
189696
189697
189698
......
189943
189944
189945
189946
189947
189948
189949



189950
189951
189952
189953
189954
189955
189956
......
190104
190105
190106
190107
190108
190109
190110
190111
190112
190113
190114
190115
190116
190117
190118
190119
190120
190121
190122
190123
190124
190125
190126
190127
190128
190129
190130
190131
......
190196
190197
190198
190199
190200
190201
190202
190203
190204
190205
190206
190207
190208
190209
190210
......
190248
190249
190250
190251
190252
190253
190254
190255
190256
190257
190258
190259
190260
190261
190262
190263
190264
190265
......
190299
190300
190301
190302
190303
190304
190305
190306
190307
190308
190309
190310
190311
190312
190313
......
190712
190713
190714
190715
190716
190717
190718
190719
190720
190721
190722
190723
190724
190725
190726

190727
190728
190729
190730
190731
190732
190733
190734
190735
190736
......
190772
190773
190774
190775
190776
190777
190778
190779
190780
190781
190782
190783
190784
190785
190786






190787
190788
190789
190790
190791
190792
190793
......
190842
190843
190844
190845
190846
190847
190848










190849
190850
190851
190852
190853

190854
190855
190856
190857
190858


190859
190860


190861
190862
190863
190864
190865
190866
190867
190868
190869
190870
190871
......
190874
190875
190876
190877
190878
190879
190880

190881
190882
190883
190884
190885
190886
190887
......
190890
190891
190892
190893
190894
190895
190896

190897
190898
190899
190900
190901
190902
190903

190904
190905
190906
190907
190908
190909
190910
......
190920
190921
190922
190923
190924
190925
190926





190927
190928
190929
190930
190931
190932
190933
......
191215
191216
191217
191218
191219
191220
191221

191222
191223
191224
191225
191226
191227
191228
......
191345
191346
191347
191348
191349
191350
191351
191352
191353
191354
191355
191356
191357
191358
191359
191360
191361
......
191539
191540
191541
191542
191543
191544
191545




191546
191547
191548
191549
191550
191551
191552
......
191629
191630
191631
191632
191633
191634
191635

191636
191637
191638
191639
191640
191641
191642
......
191664
191665
191666
191667
191668
191669
191670


191671
191672
191673
191674
191675
191676
191677
......
191727
191728
191729
191730
191731
191732
191733

191734
191735
191736
191737
191738
191739
191740
......
191883
191884
191885
191886
191887
191888
191889




































191890
191891
191892
191893
191894
191895
191896
......
193433
193434
193435
193436
193437
193438
193439
193440
193441
193442
193443
193444
193445
193446
193447
193448
193449
193450
193451
193452
......
194036
194037
194038
194039
194040
194041
194042
194043
194044
194045
194046
194047
194048
194049
194050
194051
194052
194053
194054
194055
......
194180
194181
194182
194183
194184
194185
194186
194187

194188
194189
194190
194191
194192
194193
194194
......
194200
194201
194202
194203
194204
194205
194206

194207
194208
194209
194210
194211
194212
194213
......
194214
194215
194216
194217
194218
194219
194220
194221









194222
194223
194224
194225
194226
194227
194228
194229
194230
194231
194232









194233
194234
194235
194236
194237
194238
194239
194240
194241
194242
194243
194244
194245
194246
194247
......
194256
194257
194258
194259
194260
194261
194262
194263
194264
194265
194266
194267
194268
194269
194270
......
194604
194605
194606
194607
194608
194609
194610
194611
194612
194613
194614
194615
194616
194617
194618
194619
194620
194621
......
194632
194633
194634
194635
194636
194637
194638


194639
194640
194641
194642
194643
194644
194645
194646
194647
194648
194649
194650
194651
194652
194653
194654
194655
194656
194657
194658
194659
194660

194661
194662
194663
194664
194665



194666
194667
194668
194669
194670
194671
194672
......
194975
194976
194977
194978
194979
194980
194981
194982
194983
194984
194985
194986
194987
194988
194989
......
195054
195055
195056
195057
195058
195059
195060
195061

195062
195063
195064
195065
195066
195067
195068
......
195451
195452
195453
195454
195455
195456
195457

195458
195459
195460
195461
195462
195463
195464
195465
195466
195467
195468
195469
195470
195471
195472
195473
195474
195475
195476
195477
195478
195479
195480
195481
195482
195483
195484
195485
195486
195487
195488
195489
195490
195491
195492
195493
......
195822
195823
195824
195825
195826
195827
195828
195829
195830
195831
195832
195833
195834
195835
195836
......
195888
195889
195890
195891
195892
195893
195894

195895
195896
195897
195898
195899
195900
195901
......
196038
196039
196040
196041
196042
196043
196044

196045
196046
196047
196048
196049
196050
196051
196052
......
196076
196077
196078
196079
196080
196081
196082
196083

196084
196085
196086
196087
196088
196089
196090
......
196133
196134
196135
196136
196137
196138
196139
196140

196141
196142
196143
196144
196145
196146
196147
......
196506
196507
196508
196509
196510
196511
196512
196513
196514
196515
196516
196517
196518
196519


196520
196521
196522
196523
196524
196525
196526
......
196903
196904
196905
196906
196907
196908
196909
196910
196911
196912
196913
196914
196915
196916
196917
......
197013
197014
197015
197016
197017
197018
197019





















197020
197021
197022
197023
197024
197025
197026
......
198448
198449
198450
198451
198452
198453
198454

198455
198456
198457
198458
198459
198460
198461
......
199775
199776
199777
199778
199779
199780
199781
199782
199783
199784
199785
199786
199787
199788
199789
199790
199791
199792
......
210728
210729
210730
210731
210732
210733
210734
210735
210736
210737
210738
210739
210740
210741
210742
......
214477
214478
214479
214480
214481
214482
214483
214484















214485
214486
214487
214488
214489
214490
214491
214492
214493
214494
214495
214496
......
214505
214506
214507
214508
214509
214510
214511

214512
214513
214514
214515
214516
214517
214518
......
218549
218550
218551
218552
218553
218554
218555


218556
218557
218558
218559
218560
218561
218562
218563
218564
218565
218566
218567
218568
218569
218570
218571
218572
......
218873
218874
218875
218876
218877
218878
218879

218880
218881
218882
218883
218884
218885
218886
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/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.25.3.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
  "ENABLE_FTS3_TOKENIZER",
#endif
#if SQLITE_ENABLE_FTS4
  "ENABLE_FTS4",
#endif
#if SQLITE_ENABLE_FTS5
  "ENABLE_FTS5",



#endif
#if SQLITE_ENABLE_HIDDEN_COLUMNS
  "ENABLE_HIDDEN_COLUMNS",
#endif
#if SQLITE_ENABLE_ICU
  "ENABLE_ICU",
#endif
................................................................................
  "ENABLE_MEMSYS3",
#endif
#if SQLITE_ENABLE_MEMSYS5
  "ENABLE_MEMSYS5",
#endif
#if SQLITE_ENABLE_MULTIPLEX
  "ENABLE_MULTIPLEX",



#endif
#if SQLITE_ENABLE_NULL_TRIM
  "ENABLE_NULL_TRIM",
#endif
#if SQLITE_ENABLE_OVERSIZE_CELL_CHECK
  "ENABLE_OVERSIZE_CELL_CHECK",
#endif
................................................................................
** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.3"
#define SQLITE_VERSION_NUMBER 3025003
#define SQLITE_SOURCE_ID      "2018-11-05 20:37:38 89e099fbe5e13c33e683bef07361231ca525b88f7907be7092058007b75036f2"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_db_config()] to make sure that
** the call worked.  ^The [sqlite3_db_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>

** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
** <dd> ^This option takes three additional arguments that determine the 
** [lookaside memory allocator] configuration for the [database connection].
** ^The first argument (the third parameter to [sqlite3_db_config()] is a
** pointer to a memory buffer to use for lookaside memory.
** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
** may be NULL in which case SQLite will allocate the
................................................................................
** connection is not currently using lookaside memory, or in other words
** when the "current value" returned by
** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
** Any attempt to change the lookaside memory configuration when lookaside
** memory is in use leaves the configuration unchanged and returns 
** [SQLITE_BUSY].)^</dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
** <dd> ^This option is used to enable or disable the enforcement of
** [foreign key constraints].  There should be two additional arguments.
** The first argument is an integer which is 0 to disable FK enforcement,
** positive to enable FK enforcement or negative to leave FK enforcement
** unchanged.  The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether FK enforcement is off or on
** following this call.  The second parameter may be a NULL pointer, in
** which case the FK enforcement setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable triggers,
** positive to enable triggers or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether triggers are disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the trigger setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</dt>
** <dd> ^This option is used to enable or disable the two-argument
** version of the [fts3_tokenizer()] function which is part of the
** [FTS3] full-text search engine extension.
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable fts3_tokenizer() or
** positive to enable fts3_tokenizer() or negative to leave the setting
** unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether fts3_tokenizer is disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the new setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION</dt>
** <dd> ^This option is used to enable or disable the [sqlite3_load_extension()]
** interface independently of the [load_extension()] SQL function.
** The [sqlite3_enable_load_extension()] API enables or disables both the
** C-API [sqlite3_load_extension()] and the SQL function [load_extension()].
** There should be two additional arguments.
** When the first argument to this interface is 1, then only the C-API is
................................................................................
** C-API or the SQL function.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether [sqlite3_load_extension()] interface
** is disabled or enabled following this call.  The second parameter may
** be a NULL pointer, in which case the new setting is not reported back.
** </dd>
**
** <dt>SQLITE_DBCONFIG_MAINDBNAME</dt>
** <dd> ^This option is used to change the name of the "main" database
** schema.  ^The sole argument is a pointer to a constant UTF8 string
** which will become the new schema name in place of "main".  ^SQLite
** does not make a copy of the new main schema name string, so the application
** must ensure that the argument passed into this DBCONFIG option is unchanged
** until after the database connection closes.
** </dd>
**

** <dt>SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</dt>
** <dd> Usually, when a database in wal mode is closed or detached from a 
** database handle, SQLite checks if this will mean that there are now no 
** connections at all to the database. If so, it performs a checkpoint 
** operation before closing the connection. This option may be used to
** override this behaviour. The first parameter passed to this operation
** is an integer - positive to disable checkpoints-on-close, or zero (the
** default) to enable them, and negative to leave the setting unchanged.
** The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>^(The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].)^ The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
................................................................................
** The first argument to this setting is an integer which is 0 to disable 
** the QPSG, positive to enable QPSG, or negative to leave the setting
** unchanged. The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether the QPSG is disabled or enabled
** following this call.
** </dd>
**
** <dt>SQLITE_DBCONFIG_TRIGGER_EQP</dt>
** <dd> By default, the output of EXPLAIN QUERY PLAN commands does not 
** include output for any operations performed by trigger programs. This
** option is used to set or clear (the default) a flag that governs this
** behavior. The first parameter passed to this operation is an integer -
** positive to enable output for trigger programs, or zero to disable it,
** or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which is written 
** 0 or 1 to indicate whether output-for-triggers has been disabled - 0 if 
** it is not disabled, 1 if it is.  
** </dd>
**
** <dt>SQLITE_DBCONFIG_RESET_DATABASE</dt>
** <dd> Set the SQLITE_DBCONFIG_RESET_DATABASE flag and then run
** [VACUUM] in order to reset a database back to an empty database
** with no schema and no content. The following process works even for
** a badly corrupted database file:
** <ol>
** <li> If the database connection is newly opened, make sure it has read the
**      database schema by preparing then discarding some query against the
................................................................................
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
** <li> [sqlite3_exec](db, "[VACUUM]", 0, 0, 0);
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
** </ol>
** Because resetting a database is destructive and irreversible, the
** process requires the use of this obscure API and multiple steps to help
** ensure that it does not happen by accident.












** </dd>
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */
#define SQLITE_DBCONFIG_TRIGGER_EQP           1008 /* int int* */
#define SQLITE_DBCONFIG_RESET_DATABASE        1009 /* int int* */

#define SQLITE_DBCONFIG_MAX                   1009 /* Largest DBCONFIG */

/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
................................................................................
** probably reused many times.)^ ^Without this flag, [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()] assume that the prepared statement will 
** be used just once or at most a few times and then destroyed using
** [sqlite3_finalize()] relatively soon. The current implementation acts
** on this hint by avoiding the use of [lookaside memory] so as not to
** deplete the limited store of lookaside memory. Future versions of
** SQLite may act on this hint differently.









** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01


/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
................................................................................
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.





**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
** the original string, "SELECT $abc,:xyz" but sqlite3_expanded_sql()
** will return "SELECT 2345,NULL".)^
**
................................................................................
** is available to hold the result, or if the result would exceed the
** the maximum string length determined by the [SQLITE_LIMIT_LENGTH].
**
** ^The [SQLITE_TRACE_SIZE_LIMIT] compile-time option limits the size of
** bound parameter expansions.  ^The [SQLITE_OMIT_TRACE] compile-time
** option causes sqlite3_expanded_sql() to always return NULL.
**
** ^The string returned by sqlite3_sql(P) is managed by SQLite and is
** automatically freed when the prepared statement is finalized.

** ^The string returned by sqlite3_expanded_sql(P), on the other hand,
** is obtained from [sqlite3_malloc()] and must be free by the application
** by passing it to [sqlite3_free()].
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt);
SQLITE_API char *sqlite3_expanded_sql(sqlite3_stmt *pStmt);


/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
................................................................................
                       void **ppArg);
  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
  /* The methods above are in version 1 of the sqlite_module object. Those 
  ** below are for version 2 and greater. */
  int (*xSavepoint)(sqlite3_vtab *pVTab, int);
  int (*xRelease)(sqlite3_vtab *pVTab, int);
  int (*xRollbackTo)(sqlite3_vtab *pVTab, int);



};

/*
** CAPI3REF: Virtual Table Indexing Information
** KEYWORDS: sqlite3_index_info
**
** The sqlite3_index_info structure and its substructures is used as part
................................................................................
#define SQLITE_TESTCTRL_PENDING_BYTE            11
#define SQLITE_TESTCTRL_ASSERT                  12
#define SQLITE_TESTCTRL_ALWAYS                  13
#define SQLITE_TESTCTRL_RESERVE                 14
#define SQLITE_TESTCTRL_OPTIMIZATIONS           15
#define SQLITE_TESTCTRL_ISKEYWORD               16  /* NOT USED */
#define SQLITE_TESTCTRL_SCRATCHMALLOC           17  /* NOT USED */

#define SQLITE_TESTCTRL_LOCALTIME_FAULT         18
#define SQLITE_TESTCTRL_EXPLAIN_STMT            19  /* NOT USED */
#define SQLITE_TESTCTRL_ONCE_RESET_THRESHOLD    19
#define SQLITE_TESTCTRL_NEVER_CORRUPT           20
#define SQLITE_TESTCTRL_VDBE_COVERAGE           21
#define SQLITE_TESTCTRL_BYTEORDER               22
#define SQLITE_TESTCTRL_ISINIT                  23
................................................................................
** CAPI3REF: Virtual Table Configuration Options
**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>

** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
................................................................................
  unsigned int *anQueue;            /* Number of pending entries in the queue */
  int nCoord;                       /* Number of coordinates */
  int iLevel;                       /* Level of current node or entry */
  int mxLevel;                      /* The largest iLevel value in the tree */
  sqlite3_int64 iRowid;             /* Rowid for current entry */
  sqlite3_rtree_dbl rParentScore;   /* Score of parent node */
  int eParentWithin;                /* Visibility of parent node */
  int eWithin;                      /* OUT: Visiblity */
  sqlite3_rtree_dbl rScore;         /* OUT: Write the score here */
  /* The following fields are only available in 3.8.11 and later */
  sqlite3_value **apSqlParam;       /* Original SQL values of parameters */
};

/*
** Allowed values for sqlite3_rtree_query.eWithin and .eParentWithin.
................................................................................
** [sqlite3changeset_invert()] functions, all changes within the changeset 
** that apply to a single table are grouped together. This means that when 
** an application iterates through a changeset using an iterator created by 
** this function, all changes that relate to a single table are visited 
** consecutively. There is no chance that the iterator will visit a change 
** the applies to table X, then one for table Y, and then later on visit 
** another change for table X.







*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset                /* Pointer to blob containing changeset */
);





















/*
** CAPI3REF: Advance A Changeset Iterator
** METHOD: sqlite3_changeset_iter
**
** This function may only be used with iterators created by function
................................................................................
  int(*xConflict)(
    void *pCtx,                   /* Copy of sixth arg to _apply() */
    int eConflict,                /* DATA, MISSING, CONFLICT, CONSTRAINT */
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase, /* OUT: Rebase data */
  int flags                       /* Combination of SESSION_APPLY_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_apply_v2
**
** The following flags may passed via the 9th parameter to
** [sqlite3changeset_apply_v2] and [sqlite3changeset_apply_v2_strm]:
................................................................................
**   Usually, the sessions module encloses all operations performed by
**   a single call to apply_v2() or apply_v2_strm() in a [SAVEPOINT]. The
**   SAVEPOINT is committed if the changeset or patchset is successfully
**   applied, or rolled back if an error occurs. Specifying this flag
**   causes the sessions module to omit this savepoint. In this case, if the
**   caller has an open transaction or savepoint when apply_v2() is called, 
**   it may revert the partially applied changeset by rolling it back.





*/
#define SQLITE_CHANGESETAPPLY_NOSAVEPOINT   0x0001


/* 
** CAPI3REF: Constants Passed To The Conflict Handler
**
** Values that may be passed as the second argument to a conflict-handler.
**
** <dl>
................................................................................
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn






);
SQLITE_API int sqlite3session_changeset_strm(
  sqlite3_session *pSession,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3session_patchset_strm(
................................................................................
  sqlite3_rebaser *pRebaser,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);









































/*
** Make sure we can call this stuff from C++.
*/
#if 0
}
#endif
................................................................................

#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3PagerCheckpoint(Pager *pPager, sqlite3*, int, int*, int*);
SQLITE_PRIVATE   int sqlite3PagerWalSupported(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerWalCallback(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerOpenWal(Pager *pPager, int *pisOpen);
SQLITE_PRIVATE   int sqlite3PagerCloseWal(Pager *pPager, sqlite3*);
# ifdef SQLITE_DIRECT_OVERFLOW_READ
SQLITE_PRIVATE   int sqlite3PagerUseWal(Pager *pPager, Pgno);
# endif
# ifdef SQLITE_ENABLE_SNAPSHOT
SQLITE_PRIVATE   int sqlite3PagerSnapshotGet(Pager *pPager, sqlite3_snapshot **ppSnapshot);
SQLITE_PRIVATE   int sqlite3PagerSnapshotOpen(Pager *pPager, sqlite3_snapshot *pSnapshot);
SQLITE_PRIVATE   int sqlite3PagerSnapshotRecover(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerSnapshotCheck(Pager *pPager, sqlite3_snapshot *pSnapshot);
SQLITE_PRIVATE   void sqlite3PagerSnapshotUnlock(Pager *pPager);
# endif
#else
# define sqlite3PagerUseWal(x,y) 0



#endif

#ifdef SQLITE_ENABLE_ZIPVFS
SQLITE_PRIVATE   int sqlite3PagerWalFramesize(Pager *pPager);
#endif

/* Functions used to query pager state and configuration. */
................................................................................

/* Return the header size */
SQLITE_PRIVATE int sqlite3HeaderSizePcache(void);
SQLITE_PRIVATE int sqlite3HeaderSizePcache1(void);

/* Number of dirty pages as a percentage of the configured cache size */
SQLITE_PRIVATE int sqlite3PCachePercentDirty(PCache*);





#endif /* _PCACHE_H_ */

/************** End of pcache.h **********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include os.h in the middle of sqliteInt.h ********************/
/************** Begin file os.h **********************************************/
................................................................................
};

/*
** A hash table for built-in function definitions.  (Application-defined
** functions use a regular table table from hash.h.)
**
** Hash each FuncDef structure into one of the FuncDefHash.a[] slots.
** Collisions are on the FuncDef.u.pHash chain.

*/
#define SQLITE_FUNC_HASH_SZ 23
struct FuncDefHash {
  FuncDef *a[SQLITE_FUNC_HASH_SZ];       /* Hash table for functions */
};


#ifdef SQLITE_USER_AUTHENTICATION
/*
** Information held in the "sqlite3" database connection object and used
** to manage user authentication.
*/
typedef struct sqlite3_userauth sqlite3_userauth;
................................................................................
  sqlite3_vfs *pVfs;            /* OS Interface */
  struct Vdbe *pVdbe;           /* List of active virtual machines */
  CollSeq *pDfltColl;           /* The default collating sequence (BINARY) */
  sqlite3_mutex *mutex;         /* Connection mutex */
  Db *aDb;                      /* All backends */
  int nDb;                      /* Number of backends currently in use */
  u32 mDbFlags;                 /* flags recording internal state */
  u32 flags;                    /* flags settable by pragmas. See below */
  i64 lastRowid;                /* ROWID of most recent insert (see above) */
  i64 szMmap;                   /* Default mmap_size setting */
  u32 nSchemaLock;              /* Do not reset the schema when non-zero */
  unsigned int openFlags;       /* Flags passed to sqlite3_vfs.xOpen() */
  int errCode;                  /* Most recent error code (SQLITE_*) */
  int errMask;                  /* & result codes with this before returning */
  int iSysErrno;                /* Errno value from last system error */
................................................................................
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */
#define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */



/* Flags used only if debugging */

#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        0x80000000  /* Debug EXPLAIN QUERY PLAN */
#endif

/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange   0x0001  /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin  0x0002  /* Preference to built-in funcs */
................................................................................
#define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */
#define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */
#define SQLITE_FUNC_MINMAX   0x1000 /* True for min() and max() aggregates */
#define SQLITE_FUNC_SLOCHNG  0x2000 /* "Slow Change". Value constant during a
                                    ** single query - might change over time */
#define SQLITE_FUNC_AFFINITY 0x4000 /* Built-in affinity() function */
#define SQLITE_FUNC_OFFSET   0x8000 /* Built-in sqlite_offset() function */
#define SQLITE_FUNC_WINDOW  0x10000 /* Built-in window-only function */
#define SQLITE_FUNC_WINDOW_SIZE  0x20000  /* Requires partition size as arg. */


/*
** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are
** used to create the initializers for the FuncDef structures.
**
**   FUNCTION(zName, nArg, iArg, bNC, xFunc)
**     Used to create a scalar function definition of a function zName
................................................................................
   (void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} }
#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,0,#zName, {0}}
#define AGGREGATE2(zName, nArg, arg, nc, xStep, xFinal, extraFlags) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|extraFlags, \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}

#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}





/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
................................................................................
/*
** The schema for each SQL table and view is represented in memory
** by an instance of the following structure.
*/
struct Table {
  char *zName;         /* Name of the table or view */
  Column *aCol;        /* Information about each column */



  Index *pIndex;       /* List of SQL indexes on this table. */
  Select *pSelect;     /* NULL for tables.  Points to definition if a view. */
  FKey *pFKey;         /* Linked list of all foreign keys in this table */
  char *zColAff;       /* String defining the affinity of each column */
  ExprList *pCheck;    /* All CHECK constraints */
                       /*   ... also used as column name list in a VIEW */
  int tnum;            /* Root BTree page for this table */
................................................................................
#define TF_HasStat1        0x0010    /* nRowLogEst set from sqlite_stat1 */
#define TF_WithoutRowid    0x0020    /* No rowid.  PRIMARY KEY is the key */
#define TF_NoVisibleRowid  0x0040    /* No user-visible "rowid" column */
#define TF_OOOHidden       0x0080    /* Out-of-Order hidden columns */
#define TF_StatsUsed       0x0100    /* Query planner decisions affected by
                                     ** Index.aiRowLogEst[] values */
#define TF_HasNotNull      0x0200    /* Contains NOT NULL constraints */


/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
  void *p;          /* Pointer to sampled record */
  int n;            /* Size of record in bytes */
  tRowcnt *anEq;    /* Est. number of rows where the key equals this sample */
  tRowcnt *anLt;    /* Est. number of rows where key is less than this sample */
  tRowcnt *anDLt;   /* Est. number of distinct keys less than this sample */
};







/*
** Each token coming out of the lexer is an instance of
** this structure.  Tokens are also used as part of an expression.
**
** The memory that "z" points to is owned by other objects.  Take care
** that the owner of the "z" string does not deallocate the string before
** the Token goes out of scope!  Very often, the "z" points to some place
................................................................................
                         ** TK_SELECT_COLUMN: column of the result vector */
  i16 iAgg;              /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
  i16 iRightJoinTable;   /* If EP_FromJoin, the right table of the join */
  u8 op2;                /* TK_REGISTER: original value of Expr.op
                         ** TK_COLUMN: the value of p5 for OP_Column
                         ** TK_AGG_FUNCTION: nesting depth */
  AggInfo *pAggInfo;     /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
  Table *pTab;           /* Table for TK_COLUMN expressions.  Can be NULL
                         ** for a column of an index on an expression */
#ifndef SQLITE_OMIT_WINDOWFUNC
  Window *pWin;          /* Window definition for window functions */
#endif
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
................................................................................
#define EP_NoReduce  0x020000 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Unlikely  0x040000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
#define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */
#define EP_Subquery  0x200000 /* Tree contains a TK_SELECT operator */
#define EP_Alias     0x400000 /* Is an alias for a result set column */
#define EP_Leaf      0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */


/*
** The EP_Propagate mask is a set of properties that automatically propagate
** upwards into parent nodes.
*/
#define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc)

................................................................................
  void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx);  /* Callback */
  void *pVdbeBranchArg;                                     /* 1st argument */
#endif
#ifndef SQLITE_UNTESTABLE
  int (*xTestCallback)(int);        /* Invoked by sqlite3FaultSim() */
#endif
  int bLocaltimeFault;              /* True to fail localtime() calls */

  int iOnceResetThreshold;          /* When to reset OP_Once counters */
  u32 szSorterRef;                  /* Min size in bytes to use sorter-refs */
};

/*
** This macro is used inside of assert() statements to indicate that
** the assert is only valid on a well-formed database.  Instead of:
................................................................................
SQLITE_PRIVATE int sqlite3IsIdChar(u8);

/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char*,const char*);
SQLITE_PRIVATE int sqlite3Strlen30(const char*);

SQLITE_PRIVATE char *sqlite3ColumnType(Column*,char*);
#define sqlite3StrNICmp sqlite3_strnicmp

SQLITE_PRIVATE int sqlite3MallocInit(void);
SQLITE_PRIVATE void sqlite3MallocEnd(void);
SQLITE_PRIVATE void *sqlite3Malloc(u64);
SQLITE_PRIVATE void *sqlite3MallocZero(u64);
................................................................................
SQLITE_PRIVATE   void *sqlite3TestTextToPtr(const char*);
#endif

#if defined(SQLITE_DEBUG)
SQLITE_PRIVATE   void sqlite3TreeViewExpr(TreeView*, const Expr*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*);
SQLITE_PRIVATE   void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*);

SQLITE_PRIVATE   void sqlite3TreeViewSelect(TreeView*, const Select*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewWith(TreeView*, const With*, u8);
#ifndef SQLITE_OMIT_WINDOWFUNC
SQLITE_PRIVATE   void sqlite3TreeViewWindow(TreeView*, const Window*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8);
#endif
#endif
................................................................................
#ifdef SQLITE_ENABLE_CURSOR_HINTS
SQLITE_PRIVATE int sqlite3ExprContainsSubquery(Expr*);
#endif
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCanBeNull(const Expr*);
SQLITE_PRIVATE int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);



SQLITE_PRIVATE void sqlite3GenerateRowDelete(
    Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
SQLITE_PRIVATE void sqlite3ResolvePartIdxLabel(Parse*,int);

SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
SQLITE_PRIVATE   void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
# define sqlite3SetMakeRecordP5(A,B)
#endif
................................................................................
SQLITE_PRIVATE void sqlite3UniqueConstraint(Parse*, int, Index*);
SQLITE_PRIVATE void sqlite3RowidConstraint(Parse*, int, Table*);
SQLITE_PRIVATE Expr *sqlite3ExprDup(sqlite3*,Expr*,int);
SQLITE_PRIVATE ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int);
SQLITE_PRIVATE SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int);
SQLITE_PRIVATE IdList *sqlite3IdListDup(sqlite3*,IdList*);
SQLITE_PRIVATE Select *sqlite3SelectDup(sqlite3*,Select*,int);



SQLITE_PRIVATE void sqlite3InsertBuiltinFuncs(FuncDef*,int);
SQLITE_PRIVATE FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8);
SQLITE_PRIVATE void sqlite3RegisterBuiltinFunctions(void);
SQLITE_PRIVATE void sqlite3RegisterDateTimeFunctions(void);
SQLITE_PRIVATE void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyCheckOk(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyCheckSickOrOk(sqlite3*);
................................................................................
SQLITE_PRIVATE CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
SQLITE_PRIVATE CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, Expr *pExpr);
SQLITE_PRIVATE int sqlite3ExprCollSeqMatch(Parse*,Expr*,Expr*);
SQLITE_PRIVATE Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr*, const Token*, int);
SQLITE_PRIVATE Expr *sqlite3ExprAddCollateString(Parse*,Expr*,const char*);
SQLITE_PRIVATE Expr *sqlite3ExprSkipCollate(Expr*);
SQLITE_PRIVATE int sqlite3CheckCollSeq(Parse *, CollSeq *);

SQLITE_PRIVATE int sqlite3CheckObjectName(Parse *, const char *);
SQLITE_PRIVATE void sqlite3VdbeSetChanges(sqlite3 *, int);
SQLITE_PRIVATE int sqlite3AddInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3SubInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3MulInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3AbsInt32(int);
#ifdef SQLITE_ENABLE_8_3_NAMES
................................................................................
#endif
SQLITE_PRIVATE void sqlite3RootPageMoved(sqlite3*, int, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3AlterFunctions(void);
SQLITE_PRIVATE void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
SQLITE_PRIVATE void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*);
SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *, int *);



SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*, int);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse*, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
................................................................................
SQLITE_PRIVATE int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *, VTable *);
SQLITE_PRIVATE FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
SQLITE_PRIVATE sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*);
SQLITE_PRIVATE int sqlite3VdbeParameterIndex(Vdbe*, const char*, int);
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
SQLITE_PRIVATE void sqlite3ParserReset(Parse*);



SQLITE_PRIVATE int sqlite3Reprepare(Vdbe*);
SQLITE_PRIVATE void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
SQLITE_PRIVATE int sqlite3TempInMemory(const sqlite3*);
SQLITE_PRIVATE const char *sqlite3JournalModename(int);
#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
................................................................................
   0,                         /* xVdbeBranch */
   0,                         /* pVbeBranchArg */
#endif
#ifndef SQLITE_UNTESTABLE
   0,                         /* xTestCallback */
#endif
   0,                         /* bLocaltimeFault */

   0x7ffffffe,                /* iOnceResetThreshold */
   SQLITE_DEFAULT_SORTERREF_SIZE   /* szSorterRef */
};

/*
** Hash table for global functions - functions common to all
** database connections.  After initialization, this table is
................................................................................
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for statements that do not write */
  bft bIsReader:1;        /* True for statements that read */
  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  u32 aCounter[7];        /* Counters used by sqlite3_stmt_status() */
  char *zSql;             /* Text of the SQL statement that generated this */



  void *pFree;            /* Free this when deleting the vdbe */
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
  AuxData *pAuxData;      /* Linked list of auxdata allocations */
................................................................................
SQLITE_PRIVATE u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int);

int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
SQLITE_PRIVATE int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*);
SQLITE_PRIVATE int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*);
SQLITE_PRIVATE int sqlite3VdbeExec(Vdbe*);

SQLITE_PRIVATE int sqlite3VdbeList(Vdbe*);

SQLITE_PRIVATE int sqlite3VdbeHalt(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeChangeEncoding(Mem *, int);
SQLITE_PRIVATE int sqlite3VdbeMemTooBig(Mem*);
SQLITE_PRIVATE int sqlite3VdbeMemCopy(Mem*, const Mem*);
SQLITE_PRIVATE void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int);
SQLITE_PRIVATE void sqlite3VdbeMemMove(Mem*, Mem*);
SQLITE_PRIVATE int sqlite3VdbeMemNulTerminate(Mem*);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeMemCast(Mem*,u8,u8);
SQLITE_PRIVATE int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*);
SQLITE_PRIVATE void sqlite3VdbeMemRelease(Mem *p);
SQLITE_PRIVATE int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
#ifndef SQLITE_OMIT_WINDOWFUNC
SQLITE_PRIVATE int sqlite3VdbeMemAggValue(Mem*, Mem*, FuncDef*);
#endif

SQLITE_PRIVATE const char *sqlite3OpcodeName(int);

SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
SQLITE_PRIVATE int sqlite3VdbeMemClearAndResize(Mem *pMem, int n);
SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *, int);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE int sqlite3VdbeFrameIsValid(VdbeFrame*);
#endif
SQLITE_PRIVATE void sqlite3VdbeFrameMemDel(void*);      /* Destructor on Mem */
................................................................................
      sqlite3TreeViewSelect(pView, pCte->pSelect, 0);
      sqlite3TreeViewPop(pView);
    }
    sqlite3TreeViewPop(pView);
  }
}






































/*
** Generate a human-readable description of a Select object.
*/
SQLITE_PRIVATE void sqlite3TreeViewSelect(TreeView *pView, const Select *p, u8 moreToFollow){
  int n = 0;
  int cnt = 0;
................................................................................
      for(pX=p->pWin; pX; pX=pX->pNextWin){
        sqlite3TreeViewWinFunc(pView, pX, pX->pNextWin!=0);
      }
      sqlite3TreeViewPop(pView);
    }
#endif
    if( p->pSrc && p->pSrc->nSrc ){
      int i;
      pView = sqlite3TreeViewPush(pView, (n--)>0);
      sqlite3TreeViewLine(pView, "FROM");
      for(i=0; i<p->pSrc->nSrc; i++){
        struct SrcList_item *pItem = &p->pSrc->a[i];
        StrAccum x;
        char zLine[100];
        sqlite3StrAccumInit(&x, 0, zLine, sizeof(zLine), 0);
        sqlite3_str_appendf(&x, "{%d,*}", pItem->iCursor);
        if( pItem->zDatabase ){
          sqlite3_str_appendf(&x, " %s.%s", pItem->zDatabase, pItem->zName);
        }else if( pItem->zName ){
          sqlite3_str_appendf(&x, " %s", pItem->zName);
        }
        if( pItem->pTab ){
          sqlite3_str_appendf(&x, " tabname=%Q", pItem->pTab->zName);
        }
        if( pItem->zAlias ){
          sqlite3_str_appendf(&x, " (AS %s)", pItem->zAlias);
        }
        if( pItem->fg.jointype & JT_LEFT ){
          sqlite3_str_appendf(&x, " LEFT-JOIN");
        }
        sqlite3StrAccumFinish(&x);
        sqlite3TreeViewItem(pView, zLine, i<p->pSrc->nSrc-1); 
        if( pItem->pSelect ){
          sqlite3TreeViewSelect(pView, pItem->pSelect, 0);
        }
        if( pItem->fg.isTabFunc ){
          sqlite3TreeViewExprList(pView, pItem->u1.pFuncArg, 0, "func-args:");
        }
        sqlite3TreeViewPop(pView);
      }
      sqlite3TreeViewPop(pView);
    }
    if( p->pWhere ){
      sqlite3TreeViewItem(pView, "WHERE", (n--)>0);
      sqlite3TreeViewExpr(pView, p->pWhere, 0);
      sqlite3TreeViewPop(pView);
    }
................................................................................
      Window *pWin;
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
        pWin = 0;
      }else{
        pFarg = pExpr->x.pList;
#ifndef SQLITE_OMIT_WINDOWFUNC
        pWin = pExpr->pWin;
#else
        pWin = 0;
#endif 
      }
      if( pExpr->op==TK_AGG_FUNCTION ){
        sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q",
                             pExpr->op2, pExpr->u.zToken);
................................................................................
    ** 0x9e3779b1 is 2654435761 which is the closest prime number to
    ** (2**32)*golden_ratio, where golden_ratio = (sqrt(5) - 1)/2. */
    h += sqlite3UpperToLower[c];
    h *= 0x9e3779b1;
  }
  return h;
}
















/* Link pNew element into the hash table pH.  If pEntry!=0 then also
** insert pNew into the pEntry hash bucket.
*/
static void insertElement(
  Hash *pH,              /* The complete hash table */
................................................................................
    if( sqlite3StrICmp(elem->pKey,pKey)==0 ){ 
      return elem;
    }
    elem = elem->next;
  }
  return &nullElement;
}



































/* Remove a single entry from the hash table given a pointer to that
** element and a hash on the element's key.
*/
static void removeElementGivenHash(
  Hash *pH,         /* The pH containing "elem" */
  HashElem* elem,   /* The element to be removed from the pH */
................................................................................
** found, or NULL if there is no match.
*/
SQLITE_PRIVATE void *sqlite3HashFind(const Hash *pH, const char *pKey){
  assert( pH!=0 );
  assert( pKey!=0 );
  return findElementWithHash(pH, pKey, 0)->data;
}









/* Insert an element into the hash table pH.  The key is pKey
** and the data is "data".
**
** If no element exists with a matching key, then a new
** element is created and NULL is returned.
**
................................................................................

/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1

/*
** If we are to be thread-safe, include the pthreads header and define
** the SQLITE_UNIX_THREADS macro.
*/
#if SQLITE_THREADSAFE
/* # include <pthread.h> */
# define SQLITE_UNIX_THREADS 1
#endif

/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
................................................................................
  /* WAS:  ino_t ino;   */
  u64 ino;                   /* Inode number */
#endif
};

/*
** An instance of the following structure is allocated for each open
** inode.  Or, on LinuxThreads, there is one of these structures for
** each inode opened by each thread.
**
** A single inode can have multiple file descriptors, so each unixFile
** structure contains a pointer to an instance of this object and this
** object keeps a count of the number of unixFile pointing to it.
**
** Mutex rules:
**
................................................................................
  sem_t *pSem;                    /* Named POSIX semaphore */
  char aSemName[MAX_PATHNAME+2];  /* Name of that semaphore */
#endif
};

/*
** A lists of all unixInodeInfo objects.


*/
static unixInodeInfo *inodeList = 0;  /* All unixInodeInfo objects */

#ifdef SQLITE_DEBUG
/*
** True if the inode mutex is held, or not.  Used only within assert()
** to help verify correct mutex usage.

*/
int unixFileMutexHeld(unixFile *pFile){
  assert( pFile->pInode );
  return sqlite3_mutex_held(pFile->pInode->pLockMutex);
}
int unixFileMutexNotheld(unixFile *pFile){
  assert( pFile->pInode );
................................................................................
  }
  pInode->pUnused = 0;
}

/*
** Release a unixInodeInfo structure previously allocated by findInodeInfo().
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
*/
static void releaseInodeInfo(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  assert( unixMutexHeld() );
  assert( unixFileMutexNotheld(pFile) );
  if( ALWAYS(pInode) ){
    pInode->nRef--;
................................................................................
}

/*
** Given a file descriptor, locate the unixInodeInfo object that
** describes that file descriptor.  Create a new one if necessary.  The
** return value might be uninitialized if an error occurs.
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
**
** Return an appropriate error code.
*/
static int findInodeInfo(
  unixFile *pFile,               /* Unix file with file desc used in the key */
  unixInodeInfo **ppInode        /* Return the unixInodeInfo object here */
){
................................................................................
  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
#if OS_VXWORKS
  fileId.pId = pFile->pId;
#else
  fileId.ino = (u64)statbuf.st_ino;
#endif

  pInode = inodeList;
  while( pInode && memcmp(&fileId, &pInode->fileId, sizeof(fileId)) ){
    pInode = pInode->pNext;
  }
  if( pInode==0 ){
    pInode = sqlite3_malloc64( sizeof(*pInode) );
    if( pInode==0 ){
................................................................................
      pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pInode->pLockMutex==0 ){
        sqlite3_free(pInode);
        return SQLITE_NOMEM_BKPT;
      }
    }
    pInode->nRef = 1;

    pInode->pNext = inodeList;
    pInode->pPrev = 0;
    if( inodeList ) inodeList->pPrev = pInode;
    inodeList = pInode;
  }else{
    pInode->nRef++;
  }
................................................................................
** unixMutexHeld() must be true when creating or destroying
** this object or while reading or writing the following fields:
**
**      nRef
**
** The following fields are read-only after the object is created:
** 
**      fid
**      zFilename
**
** Either unixShmNode.mutex must be held or unixShmNode.nRef==0 and
** unixMutexHeld() is true when reading or writing any other field
** in this structure.
*/
struct unixShmNode {
  unixInodeInfo *pInode;     /* unixInodeInfo that owns this SHM node */
  sqlite3_mutex *mutex;      /* Mutex to access this object */
  char *zFilename;           /* Name of the mmapped file */
  int h;                     /* Open file descriptor */
  int szRegion;              /* Size of shared-memory regions */
  u16 nRegion;               /* Size of array apRegion */
  u8 isReadonly;             /* True if read-only */
  u8 isUnlocked;             /* True if no DMS lock held */
  char **apRegion;           /* Array of mapped shared-memory regions */
  int nRef;                  /* Number of unixShm objects pointing to this */
  unixShm *pFirst;           /* All unixShm objects pointing to this */
................................................................................
/*
** Structure used internally by this VFS to record the state of an
** open shared memory connection.
**
** The following fields are initialized when this object is created and
** are read-only thereafter:
**
**    unixShm.pFile
**    unixShm.id
**
** All other fields are read/write.  The unixShm.pFile->mutex must be held
** while accessing any read/write fields.
*/
struct unixShm {
  unixShmNode *pShmNode;     /* The underlying unixShmNode object */
  unixShm *pNext;            /* Next unixShm with the same unixShmNode */
  u8 hasMutex;               /* True if holding the unixShmNode mutex */
  u8 id;                     /* Id of this connection within its unixShmNode */
  u16 sharedMask;            /* Mask of shared locks held */
  u16 exclMask;              /* Mask of exclusive locks held */
};

/*
** Constants used for locking
................................................................................
){
  unixShmNode *pShmNode; /* Apply locks to this open shared-memory segment */
  struct flock f;        /* The posix advisory locking structure */
  int rc = SQLITE_OK;    /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  pShmNode = pFile->pInode->pShmNode;
  assert( pShmNode->nRef==0 || sqlite3_mutex_held(pShmNode->mutex) );


  /* Shared locks never span more than one byte */
  assert( n==1 || lockType!=F_RDLCK );

  /* Locks are within range */
  assert( n>=1 && n<=SQLITE_SHM_NLOCK );

  if( pShmNode->h>=0 ){
    /* Initialize the locking parameters */
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;
    rc = osSetPosixAdvisoryLock(pShmNode->h, &f, pFile);
    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
static void unixShmPurge(unixFile *pFd){
  unixShmNode *p = pFd->pInode->pShmNode;
  assert( unixMutexHeld() );
  if( p && ALWAYS(p->nRef==0) ){
    int nShmPerMap = unixShmRegionPerMap();
    int i;
    assert( p->pInode==pFd->pInode );
    sqlite3_mutex_free(p->mutex);
    for(i=0; i<p->nRegion; i+=nShmPerMap){
      if( p->h>=0 ){
        osMunmap(p->apRegion[i], p->szRegion);
      }else{
        sqlite3_free(p->apRegion[i]);
      }
    }
    sqlite3_free(p->apRegion);
    if( p->h>=0 ){
      robust_close(pFd, p->h, __LINE__);
      p->h = -1;
    }
    p->pInode->pShmNode = 0;
    sqlite3_free(p);
  }
}

/*
................................................................................
  ** process might open and use the *-shm file without truncating it.
  ** And if the *-shm file has been corrupted by a power failure or
  ** system crash, the database itself may also become corrupt.  */
  lock.l_whence = SEEK_SET;
  lock.l_start = UNIX_SHM_DMS;
  lock.l_len = 1;
  lock.l_type = F_WRLCK;
  if( osFcntl(pShmNode->h, F_GETLK, &lock)!=0 ) {
    rc = SQLITE_IOERR_LOCK;
  }else if( lock.l_type==F_UNLCK ){
    if( pShmNode->isReadonly ){
      pShmNode->isUnlocked = 1;
      rc = SQLITE_READONLY_CANTINIT;
    }else{
      rc = unixShmSystemLock(pDbFd, F_WRLCK, UNIX_SHM_DMS, 1);





      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->h, 0) ){
        rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);
      }
    }
  }else if( lock.l_type==F_WRLCK ){
    rc = SQLITE_BUSY;
  }

................................................................................
    sqlite3_snprintf(nShmFilename, zShm, 
                     SQLITE_SHM_DIRECTORY "/sqlite-shm-%x-%x",
                     (u32)sStat.st_ino, (u32)sStat.st_dev);
#else
    sqlite3_snprintf(nShmFilename, zShm, "%s-shm", zBasePath);
    sqlite3FileSuffix3(pDbFd->zPath, zShm);
#endif
    pShmNode->h = -1;
    pDbFd->pInode->pShmNode = pShmNode;
    pShmNode->pInode = pDbFd->pInode;
    if( sqlite3GlobalConfig.bCoreMutex ){
      pShmNode->mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pShmNode->mutex==0 ){
        rc = SQLITE_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( pInode->bProcessLock==0 ){
      if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
        pShmNode->h = robust_open(zShm, O_RDWR|O_CREAT, (sStat.st_mode&0777));
      }
      if( pShmNode->h<0 ){
        pShmNode->h = robust_open(zShm, O_RDONLY, (sStat.st_mode&0777));
        if( pShmNode->h<0 ){
          rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShm);
          goto shm_open_err;
        }
        pShmNode->isReadonly = 1;
      }

      /* If this process is running as root, make sure that the SHM file
      ** is owned by the same user that owns the original database.  Otherwise,
      ** the original owner will not be able to connect.
      */
      robustFchown(pShmNode->h, sStat.st_uid, sStat.st_gid);

      rc = unixLockSharedMemory(pDbFd, pShmNode);
      if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
................................................................................
  pDbFd->pShm = p;
  unixLeaveMutex();

  /* The reference count on pShmNode has already been incremented under
  ** the cover of the unixEnterMutex() mutex and the pointer from the
  ** new (struct unixShm) object to the pShmNode has been set. All that is
  ** left to do is to link the new object into the linked list starting
  ** at pShmNode->pFirst. This must be done while holding the pShmNode->mutex 
  ** mutex.
  */
  sqlite3_mutex_enter(pShmNode->mutex);
  p->pNext = pShmNode->pFirst;
  pShmNode->pFirst = p;
  sqlite3_mutex_leave(pShmNode->mutex);
  return rc;

  /* Jump here on any error */
shm_open_err:
  unixShmPurge(pDbFd);       /* This call frees pShmNode if required */
  sqlite3_free(p);
  unixLeaveMutex();
................................................................................
  if( pDbFd->pShm==0 ){
    rc = unixOpenSharedMemory(pDbFd);
    if( rc!=SQLITE_OK ) return rc;
  }

  p = pDbFd->pShm;
  pShmNode = p->pShmNode;
  sqlite3_mutex_enter(pShmNode->mutex);
  if( pShmNode->isUnlocked ){
    rc = unixLockSharedMemory(pDbFd, pShmNode);
    if( rc!=SQLITE_OK ) goto shmpage_out;
    pShmNode->isUnlocked = 0;
  }
  assert( szRegion==pShmNode->szRegion || pShmNode->nRegion==0 );
  assert( pShmNode->pInode==pDbFd->pInode );
  assert( pShmNode->h>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->h<0 || pDbFd->pInode->bProcessLock==0 );

  /* Minimum number of regions required to be mapped. */
  nReqRegion = ((iRegion+nShmPerMap) / nShmPerMap) * nShmPerMap;

  if( pShmNode->nRegion<nReqRegion ){
    char **apNew;                      /* New apRegion[] array */
    int nByte = nReqRegion*szRegion;   /* Minimum required file size */
    struct stat sStat;                 /* Used by fstat() */

    pShmNode->szRegion = szRegion;

    if( pShmNode->h>=0 ){
      /* The requested region is not mapped into this processes address space.
      ** Check to see if it has been allocated (i.e. if the wal-index file is
      ** large enough to contain the requested region).
      */
      if( osFstat(pShmNode->h, &sStat) ){
        rc = SQLITE_IOERR_SHMSIZE;
        goto shmpage_out;
      }
  
      if( sStat.st_size<nByte ){
        /* The requested memory region does not exist. If bExtend is set to
        ** false, exit early. *pp will be set to NULL and SQLITE_OK returned.
................................................................................
          static const int pgsz = 4096;
          int iPg;

          /* Write to the last byte of each newly allocated or extended page */
          assert( (nByte % pgsz)==0 );
          for(iPg=(sStat.st_size/pgsz); iPg<(nByte/pgsz); iPg++){
            int x = 0;
            if( seekAndWriteFd(pShmNode->h, iPg*pgsz + pgsz-1, "", 1, &x)!=1 ){
              const char *zFile = pShmNode->zFilename;
              rc = unixLogError(SQLITE_IOERR_SHMSIZE, "write", zFile);
              goto shmpage_out;
            }
          }
        }
      }
................................................................................
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem;
      if( pShmNode->h>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
        );
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc64(szRegion);
        if( pMem==0 ){
          rc = SQLITE_NOMEM_BKPT;
          goto shmpage_out;
        }
        memset(pMem, 0, szRegion);
      }

      for(i=0; i<nShmPerMap; i++){
        pShmNode->apRegion[pShmNode->nRegion+i] = &((char*)pMem)[szRegion*i];
      }
      pShmNode->nRegion += nShmPerMap;
    }
................................................................................
shmpage_out:
  if( pShmNode->nRegion>iRegion ){
    *pp = pShmNode->apRegion[iRegion];
  }else{
    *pp = 0;
  }
  if( pShmNode->isReadonly && rc==SQLITE_OK ) rc = SQLITE_READONLY;
  sqlite3_mutex_leave(pShmNode->mutex);
  return rc;
}

/*
** Change the lock state for a shared-memory segment.
**
** Note that the relationship between SHAREd and EXCLUSIVE locks is a little
................................................................................
  assert( ofst>=0 && ofst+n<=SQLITE_SHM_NLOCK );
  assert( n>=1 );
  assert( flags==(SQLITE_SHM_LOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE) );
  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );
  assert( pShmNode->h>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->h<0 || pDbFd->pInode->bProcessLock==0 );

  mask = (1<<(ofst+n)) - (1<<ofst);
  assert( n>1 || mask==(1<<ofst) );
  sqlite3_mutex_enter(pShmNode->mutex);
  if( flags & SQLITE_SHM_UNLOCK ){
    u16 allMask = 0; /* Mask of locks held by siblings */

    /* See if any siblings hold this same lock */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
................................................................................
      rc = unixShmSystemLock(pDbFd, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){
        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->mutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
           p->id, osGetpid(0), p->sharedMask, p->exclMask));
  return rc;
}

/*
** Implement a memory barrier or memory fence on shared memory.  
................................................................................
  pShmNode = p->pShmNode;

  assert( pShmNode==pDbFd->pInode->pShmNode );
  assert( pShmNode->pInode==pDbFd->pInode );

  /* Remove connection p from the set of connections associated
  ** with pShmNode */
  sqlite3_mutex_enter(pShmNode->mutex);
  for(pp=&pShmNode->pFirst; (*pp)!=p; pp = &(*pp)->pNext){}
  *pp = p->pNext;

  /* Free the connection p */
  sqlite3_free(p);
  pDbFd->pShm = 0;
  sqlite3_mutex_leave(pShmNode->mutex);

  /* If pShmNode->nRef has reached 0, then close the underlying
  ** shared-memory file, too */
  assert( unixFileMutexNotheld(pDbFd) );
  unixEnterMutex();
  assert( pShmNode->nRef>0 );
  pShmNode->nRef--;
  if( pShmNode->nRef==0 ){
    if( deleteFlag && pShmNode->h>=0 ){
      osUnlink(pShmNode->zFilename);
    }
    unixShmPurge(pDbFd);
  }
  unixLeaveMutex();

  return SQLITE_OK;
................................................................................
  winceLock local;        /* Locks obtained by this instance of winFile */
  winceLock *shared;      /* Global shared lock memory for the file  */
#endif
#if SQLITE_MAX_MMAP_SIZE>0
  int nFetchOut;                /* Number of outstanding xFetch references */
  HANDLE hMap;                  /* Handle for accessing memory mapping */
  void *pMapRegion;             /* Area memory mapped */
  sqlite3_int64 mmapSize;       /* Usable size of mapped region */
  sqlite3_int64 mmapSizeActual; /* Actual size of mapped region */
  sqlite3_int64 mmapSizeMax;    /* Configured FCNTL_MMAP_SIZE value */
#endif
};

/*
** The winVfsAppData structure is used for the pAppData member for all of the
** Win32 VFS variants.
................................................................................
*/
static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){
  winFile *pFile = (winFile*)id;  /* File handle object */
  int rc = SQLITE_OK;             /* Return code for this function */
  DWORD lastErrno;
#if SQLITE_MAX_MMAP_SIZE>0
  sqlite3_int64 oldMmapSize;




















#endif

  assert( pFile );
  SimulateIOError(return SQLITE_IOERR_TRUNCATE);
  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, size=%lld, lock=%d\n",
           osGetCurrentProcessId(), pFile, pFile->h, nByte, pFile->locktype));

................................................................................
/*
** Cleans up the mapped region of the specified file, if any.
*/
#if SQLITE_MAX_MMAP_SIZE>0
static int winUnmapfile(winFile *pFile){
  assert( pFile!=0 );
  OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, hMap=%p, pMapRegion=%p, "
           "mmapSize=%lld, mmapSizeActual=%lld, mmapSizeMax=%lld\n",
           osGetCurrentProcessId(), pFile, pFile->hMap, pFile->pMapRegion,
           pFile->mmapSize, pFile->mmapSizeActual, pFile->mmapSizeMax));
  if( pFile->pMapRegion ){
    if( !osUnmapViewOfFile(pFile->pMapRegion) ){
      pFile->lastErrno = osGetLastError();
      OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, pMapRegion=%p, "
               "rc=SQLITE_IOERR_MMAP\n", osGetCurrentProcessId(), pFile,
               pFile->pMapRegion));
      return winLogError(SQLITE_IOERR_MMAP, pFile->lastErrno,
                         "winUnmapfile1", pFile->zPath);
    }
    pFile->pMapRegion = 0;
    pFile->mmapSize = 0;
    pFile->mmapSizeActual = 0;
  }
  if( pFile->hMap!=NULL ){
    if( !osCloseHandle(pFile->hMap) ){
      pFile->lastErrno = osGetLastError();
      OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, hMap=%p, rc=SQLITE_IOERR_MMAP\n",
               osGetCurrentProcessId(), pFile, pFile->hMap));
      return winLogError(SQLITE_IOERR_MMAP, pFile->lastErrno,
................................................................................
      /* Log the error, but continue normal operation using xRead/xWrite */
      OSTRACE(("MAP-FILE-MAP pid=%lu, pFile=%p, rc=%s\n",
               osGetCurrentProcessId(), pFd, sqlite3ErrName(rc)));
      return SQLITE_OK;
    }
    pFd->pMapRegion = pNew;
    pFd->mmapSize = nMap;
    pFd->mmapSizeActual = nMap;
  }

  OSTRACE(("MAP-FILE pid=%lu, pFile=%p, rc=SQLITE_OK\n",
           osGetCurrentProcessId(), pFd));
  return SQLITE_OK;
}
#endif /* SQLITE_MAX_MMAP_SIZE>0 */
................................................................................
  }
  pFile->lastErrno = NO_ERROR;
  pFile->zPath = zName;
#if SQLITE_MAX_MMAP_SIZE>0
  pFile->hMap = NULL;
  pFile->pMapRegion = 0;
  pFile->mmapSize = 0;
  pFile->mmapSizeActual = 0;
  pFile->mmapSizeMax = sqlite3GlobalConfig.szMmap;
#endif

  OpenCounter(+1);
  return rc;
}

................................................................................
**   such that p was added to the list more recently than p->pDirtyNext.
**   PCache.pDirty points to the first (newest) element in the list and
**   pDirtyTail to the last (oldest).
**
**   The PCache.pSynced variable is used to optimize searching for a dirty
**   page to eject from the cache mid-transaction. It is better to eject
**   a page that does not require a journal sync than one that does. 
**   Therefore, pSynced is maintained to that it *almost* always points
**   to either the oldest page in the pDirty/pDirtyTail list that has a
**   clear PGHDR_NEED_SYNC flag or to a page that is older than this one
**   (so that the right page to eject can be found by following pDirtyPrev
**   pointers).
*/
struct PCache {
  PgHdr *pDirty, *pDirtyTail;         /* List of dirty pages in LRU order */
................................................................................
SQLITE_PRIVATE int sqlite3PCachePercentDirty(PCache *pCache){
  PgHdr *pDirty;
  int nDirty = 0;
  int nCache = numberOfCachePages(pCache);
  for(pDirty=pCache->pDirty; pDirty; pDirty=pDirty->pDirtyNext) nDirty++;
  return nCache ? (int)(((i64)nDirty * 100) / nCache) : 0;
}










#if defined(SQLITE_CHECK_PAGES) || defined(SQLITE_DEBUG)
/*
** For all dirty pages currently in the cache, invoke the specified
** callback. This is only used if the SQLITE_CHECK_PAGES macro is
** defined.
*/
................................................................................
  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
};

/*
** A page is pinned if it is no on the LRU list

*/
#define PAGE_IS_PINNED(p)    ((p)->pLruNext==0)
#define PAGE_IS_UNPINNED(p)  ((p)->pLruNext!=0)

/* Each page cache (or PCache) belongs to a PGroup.  A PGroup is a set 
** of one or more PCaches that are able to recycle each other's unpinned
** pages when they are under memory pressure.  A PGroup is an instance of
................................................................................
**
** instead of
**
**   if( pPager->jfd->pMethods ){ ...
*/
#define isOpen(pFd) ((pFd)->pMethods!=0)


/*
** Return true if this pager uses a write-ahead log to read page pgno.
** Return false if the pager reads pgno directly from the database.





*/
#if !defined(SQLITE_OMIT_WAL) && defined(SQLITE_DIRECT_OVERFLOW_READ)
SQLITE_PRIVATE int sqlite3PagerUseWal(Pager *pPager, Pgno pgno){




  u32 iRead = 0;
  int rc;
  if( pPager->pWal==0 ) return 0;
  rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iRead);



  return rc || iRead;
}
#endif

#ifndef SQLITE_OMIT_WAL
# define pagerUseWal(x) ((x)->pWal!=0)
#else
# define pagerUseWal(x) 0
# define pagerRollbackWal(x) 0
# define pagerWalFrames(v,w,x,y) 0
# define pagerOpenWalIfPresent(z) SQLITE_OK
................................................................................
SQLITE_PRIVATE void sqlite3PagerSetCodec(
  Pager *pPager,
  void *(*xCodec)(void*,void*,Pgno,int),
  void (*xCodecSizeChng)(void*,int,int),
  void (*xCodecFree)(void*),
  void *pCodec
){

  if( pPager->xCodecFree ) pPager->xCodecFree(pPager->pCodec);



  pPager->xCodec = pPager->memDb ? 0 : xCodec;
  pPager->xCodecSizeChng = xCodecSizeChng;
  pPager->xCodecFree = xCodecFree;
  pPager->pCodec = pCodec;
  setGetterMethod(pPager);
  pagerReportSize(pPager);
}
................................................................................
      pBt->usableSize = usableSize;
      pBt->pageSize = pageSize;
      freeTempSpace(pBt);
      rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
                                   pageSize-usableSize);
      return rc;
    }
    if( (pBt->db->flags & SQLITE_WriteSchema)==0 && nPage>nPageFile ){
      rc = SQLITE_CORRUPT_BKPT;
      goto page1_init_failed;
    }
    /* EVIDENCE-OF: R-28312-64704 However, the usable size is not allowed to
    ** be less than 480. In other words, if the page size is 512, then the
    ** reserved space size cannot exceed 32. */
    if( usableSize<480 ){
................................................................................
  Pager *pPager = pBt->pPager;
  int rc;

  assert( eType==PTRMAP_OVERFLOW2 || eType==PTRMAP_OVERFLOW1 || 
      eType==PTRMAP_BTREE || eType==PTRMAP_ROOTPAGE );
  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( pDbPage->pBt==pBt );


  /* Move page iDbPage from its current location to page number iFreePage */
  TRACE(("AUTOVACUUM: Moving %d to free page %d (ptr page %d type %d)\n", 
      iDbPage, iFreePage, iPtrPage, eType));
  rc = sqlite3PagerMovepage(pPager, pDbPage->pDbPage, iFreePage, isCommit);
  if( rc!=SQLITE_OK ){
    return rc;
................................................................................
          rc = getOverflowPage(pBt, nextPage, 0, &nextPage);
        }
        offset -= ovflSize;
      }else{
        /* Need to read this page properly. It contains some of the
        ** range of data that is being read (eOp==0) or written (eOp!=0).
        */
#ifdef SQLITE_DIRECT_OVERFLOW_READ
        sqlite3_file *fd;      /* File from which to do direct overflow read */
#endif
        int a = amt;
        if( a + offset > ovflSize ){
          a = ovflSize - offset;
        }

#ifdef SQLITE_DIRECT_OVERFLOW_READ
        /* If all the following are true:
        **
        **   1) this is a read operation, and 
        **   2) data is required from the start of this overflow page, and
        **   3) there is no open write-transaction, and
        **   4) the database is file-backed, and
        **   5) the page is not in the WAL file
        **   6) at least 4 bytes have already been read into the output buffer 
        **
        ** then data can be read directly from the database file into the
        ** output buffer, bypassing the page-cache altogether. This speeds
        ** up loading large records that span many overflow pages.
        */
        if( eOp==0                                             /* (1) */
         && offset==0                                          /* (2) */
         && pBt->inTransaction==TRANS_READ                     /* (3) */
         && (fd = sqlite3PagerFile(pBt->pPager))->pMethods     /* (4) */
         && 0==sqlite3PagerUseWal(pBt->pPager, nextPage)       /* (5) */
         && &pBuf[-4]>=pBufStart                               /* (6) */
        ){

          u8 aSave[4];
          u8 *aWrite = &pBuf[-4];
          assert( aWrite>=pBufStart );                         /* due to (6) */
          memcpy(aSave, aWrite, 4);
          rc = sqlite3OsRead(fd, aWrite, a+4, (i64)pBt->pageSize*(nextPage-1));
          nextPage = get4byte(aWrite);
          memcpy(aWrite, aSave, 4);
................................................................................
  */
  if( fg & MEM_Int ){
    sqlite3_snprintf(nByte, pMem->z, "%lld", pMem->u.i);
  }else{
    assert( fg & MEM_Real );
    sqlite3_snprintf(nByte, pMem->z, "%!.15g", pMem->u.r);
  }

  pMem->n = sqlite3Strlen30(pMem->z);
  pMem->enc = SQLITE_UTF8;
  pMem->flags |= MEM_Str|MEM_Term;
  if( bForce ) pMem->flags &= ~(MEM_Int|MEM_Real);
  sqlite3VdbeChangeEncoding(pMem, enc);
  return SQLITE_OK;
}

................................................................................
  if( p==0 ) return;
  p->prepFlags = prepFlags;
  if( (prepFlags & SQLITE_PREPARE_SAVESQL)==0 ){
    p->expmask = 0;
  }
  assert( p->zSql==0 );
  p->zSql = sqlite3DbStrNDup(p->db, z, n);







}

/*
** Swap all content between two VDBE structures.
*/
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
................................................................................
  pB->pNext = pTmp;
  pTmp = pA->pPrev;
  pA->pPrev = pB->pPrev;
  pB->pPrev = pTmp;
  zTmp = pA->zSql;
  pA->zSql = pB->zSql;
  pB->zSql = zTmp;





  pB->expmask = pA->expmask;
  pB->prepFlags = pA->prepFlags;
  memcpy(pB->aCounter, pA->aCounter, sizeof(pB->aCounter));
  pB->aCounter[SQLITE_STMTSTATUS_REPREPARE]++;
}

/*
................................................................................
    releaseMemArray(p->aVar, p->nVar);
    sqlite3DbFree(db, p->pVList);
    sqlite3DbFree(db, p->pFree);
  }
  vdbeFreeOpArray(db, p->aOp, p->nOp);
  sqlite3DbFree(db, p->aColName);
  sqlite3DbFree(db, p->zSql);



#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
  {
    int i;
    for(i=0; i<p->nScan; i++){
      sqlite3DbFree(db, p->aScan[i].zName);
    }
    sqlite3DbFree(db, p->aScan);
................................................................................
    z = sqlite3VdbeExpandSql(p, zSql);
    sqlite3_mutex_leave(p->db->mutex);
  }
  return z;
#endif
}











#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
/*
** Allocate and populate an UnpackedRecord structure based on the serialized
** record in nKey/pKey. Return a pointer to the new UnpackedRecord structure
** if successful, or a NULL pointer if an OOM error is encountered.
*/
static UnpackedRecord *vdbeUnpackRecord(
................................................................................
  }else{
    /* Rare case of a really large header */
    nVarint = sqlite3VarintLen(nHdr);
    nHdr += nVarint;
    if( nVarint<sqlite3VarintLen(nHdr) ) nHdr++;
  }
  nByte = nHdr+nData;
  if( nByte+nZero>db->aLimit[SQLITE_LIMIT_LENGTH] ){
    goto too_big;
  }

  /* Make sure the output register has a buffer large enough to store 
  ** the new record. The output register (pOp->p3) is not allowed to
  ** be one of the input registers (because the following call to
  ** sqlite3VdbeMemClearAndResize() could clobber the value before it is used).
  */










  if( sqlite3VdbeMemClearAndResize(pOut, (int)nByte) ){
    goto no_mem;

  }
  zNewRecord = (u8 *)pOut->z;

  /* Write the record */
  i = putVarint32(zNewRecord, nHdr);
  j = nHdr;
  assert( pData0<=pLast );
................................................................................
    db->mDbFlags |= DBFLAG_SchemaChange;
    p->expired = 0;
  }else
#endif
  {
    zMaster = MASTER_NAME;
    initData.db = db;
    initData.iDb = pOp->p1;
    initData.pzErrMsg = &p->zErrMsg;
    initData.mInitFlags = 0;
    zSql = sqlite3MPrintf(db,
       "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s ORDER BY rowid",
       db->aDb[iDb].zDbSName, zMaster, pOp->p4.z);
    if( zSql==0 ){
      rc = SQLITE_NOMEM_BKPT;
................................................................................
        continue;
      }else if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
      }else if( pExpr->x.pList ){
        if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( !ExprHasProperty(pExpr, EP_Reduced) && pExpr->pWin ){
        Window *pWin = pExpr->pWin;
        if( sqlite3WalkExprList(pWalker, pWin->pPartition) ) return WRC_Abort;
        if( sqlite3WalkExprList(pWalker, pWin->pOrderBy) ) return WRC_Abort;
        if( sqlite3WalkExpr(pWalker, pWin->pFilter) ) return WRC_Abort;
      }
#endif
    }
    break;
................................................................................
** expression node refer back to that source column.  The following changes
** are made to pExpr:
**
**    pExpr->iDb           Set the index in db->aDb[] of the database X
**                         (even if X is implied).
**    pExpr->iTable        Set to the cursor number for the table obtained
**                         from pSrcList.
**    pExpr->pTab          Points to the Table structure of X.Y (even if
**                         X and/or Y are implied.)
**    pExpr->iColumn       Set to the column number within the table.
**    pExpr->op            Set to TK_COLUMN.
**    pExpr->pLeft         Any expression this points to is deleted
**    pExpr->pRight        Any expression this points to is deleted.
**
** The zDb variable is the name of the database (the "X").  This value may be
................................................................................

  assert( pNC );     /* the name context cannot be NULL. */
  assert( zCol );    /* The Z in X.Y.Z cannot be NULL */
  assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );

  /* Initialize the node to no-match */
  pExpr->iTable = -1;
  pExpr->pTab = 0;
  ExprSetVVAProperty(pExpr, EP_NoReduce);

  /* Translate the schema name in zDb into a pointer to the corresponding
  ** schema.  If not found, pSchema will remain NULL and nothing will match
  ** resulting in an appropriate error message toward the end of this routine
  */
  if( zDb ){
................................................................................
        if( zTab ){
          const char *zTabName = pItem->zAlias ? pItem->zAlias : pTab->zName;
          assert( zTabName!=0 );
          if( sqlite3StrICmp(zTabName, zTab)!=0 ){
            continue;
          }
          if( IN_RENAME_OBJECT && pItem->zAlias ){
            sqlite3RenameTokenRemap(pParse, 0, (void*)&pExpr->pTab);
          }
        }
        if( 0==(cntTab++) ){
          pMatch = pItem;
        }
        for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
          if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
................................................................................
            pExpr->iColumn = j==pTab->iPKey ? -1 : (i16)j;
            break;
          }
        }
      }
      if( pMatch ){
        pExpr->iTable = pMatch->iCursor;
        pExpr->pTab = pMatch->pTab;
        /* RIGHT JOIN not (yet) supported */
        assert( (pMatch->fg.jointype & JT_RIGHT)==0 );
        if( (pMatch->fg.jointype & JT_LEFT)!=0 ){
          ExprSetProperty(pExpr, EP_CanBeNull);
        }
        pSchema = pExpr->pTab->pSchema;
      }
    } /* if( pSrcList ) */

#if !defined(SQLITE_OMIT_TRIGGER) || !defined(SQLITE_OMIT_UPSERT)
    /* If we have not already resolved the name, then maybe 
    ** it is a new.* or old.* trigger argument reference.  Or
    ** maybe it is an excluded.* from an upsert.
................................................................................
        if( iCol<pTab->nCol ){
          cnt++;
#ifndef SQLITE_OMIT_UPSERT
          if( pExpr->iTable==2 ){
            testcase( iCol==(-1) );
            if( IN_RENAME_OBJECT ){
              pExpr->iColumn = iCol;
              pExpr->pTab = pTab;
              eNewExprOp = TK_COLUMN;
            }else{
              pExpr->iTable = pNC->uNC.pUpsert->regData + iCol;
              eNewExprOp = TK_REGISTER;
              ExprSetProperty(pExpr, EP_Alias);
            }
          }else
................................................................................
              testcase( iCol==32 );
              pParse->oldmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }else{
              testcase( iCol==31 );
              testcase( iCol==32 );
              pParse->newmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }
            pExpr->pTab = pTab;
            pExpr->iColumn = (i16)iCol;
            eNewExprOp = TK_TRIGGER;
#endif /* SQLITE_OMIT_TRIGGER */
          }
        }
      }
    }
................................................................................
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 ){
    assert( pExpr->op==TK_ID );
    if( ExprHasProperty(pExpr,EP_DblQuoted) ){
      pExpr->op = TK_STRING;
      pExpr->pTab = 0;
      return WRC_Prune;
    }
    if( sqlite3ExprIdToTrueFalse(pExpr) ){
      return WRC_Prune;
    }
  }

................................................................................
** Allocate and return a pointer to an expression to load the column iCol
** from datasource iSrc in SrcList pSrc.
*/
SQLITE_PRIVATE Expr *sqlite3CreateColumnExpr(sqlite3 *db, SrcList *pSrc, int iSrc, int iCol){
  Expr *p = sqlite3ExprAlloc(db, TK_COLUMN, 0, 0);
  if( p ){
    struct SrcList_item *pItem = &pSrc->a[iSrc];
    p->pTab = pItem->pTab;
    p->iTable = pItem->iCursor;
    if( p->pTab->iPKey==iCol ){
      p->iColumn = -1;
    }else{
      p->iColumn = (ynVar)iCol;
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );
      pItem->colUsed |= ((Bitmask)1)<<(iCol>=BMS ? BMS-1 : iCol);
    }
................................................................................
    case TK_ROW: {
      SrcList *pSrcList = pNC->pSrcList;
      struct SrcList_item *pItem;
      assert( pSrcList && pSrcList->nSrc==1 );
      pItem = pSrcList->a;
      assert( HasRowid(pItem->pTab) && pItem->pTab->pSelect==0 );
      pExpr->op = TK_COLUMN;
      pExpr->pTab = pItem->pTab;
      pExpr->iTable = pItem->iCursor;
      pExpr->iColumn = -1;
      pExpr->affinity = SQLITE_AFF_INTEGER;
      break;
    }
#endif /* defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
          && !defined(SQLITE_OMIT_SUBQUERY) */
................................................................................
          pLeft = pRight->pLeft;
          pRight = pRight->pRight;
        }
        zTable = pLeft->u.zToken;
        zColumn = pRight->u.zToken;
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)pExpr, (void*)pRight);
        }
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)&pExpr->pTab, (void*)pLeft);
        }
      }
      return lookupName(pParse, zDb, zTable, zColumn, pNC, pExpr);
    }

    /* Resolve function names
    */
................................................................................
        if( (pDef->funcFlags & SQLITE_FUNC_CONSTANT)==0 ){
          /* Date/time functions that use 'now', and other functions like
          ** sqlite_version() that might change over time cannot be used
          ** in an index. */
          notValid(pParse, pNC, "non-deterministic functions",
                   NC_IdxExpr|NC_PartIdx);
        }









      }

      if( 0==IN_RENAME_OBJECT ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
          || (pDef->xValue==0 && pDef->xInverse==0)
          || (pDef->xValue && pDef->xInverse && pDef->xSFunc && pDef->xFinalize)
        );
        if( pDef && pDef->xValue==0 && pExpr->pWin ){
          sqlite3ErrorMsg(pParse, 
              "%.*s() may not be used as a window function", nId, zId
          );
          pNC->nErr++;
        }else if( 
              (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
           || (is_agg && (pDef->funcFlags & SQLITE_FUNC_WINDOW) && !pExpr->pWin)
           || (is_agg && pExpr->pWin && (pNC->ncFlags & NC_AllowWin)==0)
        ){
          const char *zType;
          if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->pWin ){
            zType = "window";
          }else{
            zType = "aggregate";
          }
          sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()",zType,nId,zId);
          pNC->nErr++;
          is_agg = 0;
................................................................................
        }else if( wrong_num_args ){
          sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
               nId, zId);
          pNC->nErr++;
        }
        if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
          pNC->ncFlags &= ~(pExpr->pWin ? NC_AllowWin : NC_AllowAgg);
#else
          pNC->ncFlags &= ~NC_AllowAgg;
#endif
        }
      }
      sqlite3WalkExprList(pWalker, pList);
      if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pExpr->pWin ){
          Select *pSel = pNC->pWinSelect;
          sqlite3WalkExprList(pWalker, pExpr->pWin->pPartition);
          sqlite3WalkExprList(pWalker, pExpr->pWin->pOrderBy);
          sqlite3WalkExpr(pWalker, pExpr->pWin->pFilter);
          sqlite3WindowUpdate(pParse, pSel->pWinDefn, pExpr->pWin, pDef);
          if( 0==pSel->pWin 
           || 0==sqlite3WindowCompare(pParse, pSel->pWin, pExpr->pWin) 
          ){
            pExpr->pWin->pNextWin = pSel->pWin;
            pSel->pWin = pExpr->pWin;
          }
          pNC->ncFlags |= NC_AllowWin;
        }else
#endif /* SQLITE_OMIT_WINDOWFUNC */
        {
          NameContext *pNC2 = pNC;
          pExpr->op = TK_AGG_FUNCTION;
................................................................................
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pE->pWin ){
          /* Since this window function is being changed into a reference
          ** to the same window function the result set, remove the instance
          ** of this window function from the Select.pWin list. */
          Window **pp;
          for(pp=&pSelect->pWin; *pp; pp=&(*pp)->pNextWin){
            if( *pp==pE->pWin ){
              *pp = (*pp)->pNextWin;
            }    
          }
        }
#endif
        pItem->u.x.iOrderByCol = j+1;
      }
................................................................................
  if( op==TK_REGISTER ) op = pExpr->op2;
#ifndef SQLITE_OMIT_CAST
  if( op==TK_CAST ){
    assert( !ExprHasProperty(pExpr, EP_IntValue) );
    return sqlite3AffinityType(pExpr->u.zToken, 0);
  }
#endif
  if( (op==TK_AGG_COLUMN || op==TK_COLUMN) && pExpr->pTab ){
    return sqlite3TableColumnAffinity(pExpr->pTab, pExpr->iColumn);
  }
  if( op==TK_SELECT_COLUMN ){
    assert( pExpr->pLeft->flags&EP_xIsSelect );
    return sqlite3ExprAffinity(
        pExpr->pLeft->x.pSelect->pEList->a[pExpr->iColumn].pExpr
    );
  }
................................................................................
  CollSeq *pColl = 0;
  Expr *p = pExpr;
  while( p ){
    int op = p->op;
    if( p->flags & EP_Generic ) break;
    if( (op==TK_AGG_COLUMN || op==TK_COLUMN
          || op==TK_REGISTER || op==TK_TRIGGER)
     && p->pTab!=0
    ){
      /* op==TK_REGISTER && p->pTab!=0 happens when pExpr was originally
      ** a TK_COLUMN but was previously evaluated and cached in a register */
      int j = p->iColumn;
      if( j>=0 ){
        const char *zColl = p->pTab->aCol[j].zColl;
        pColl = sqlite3FindCollSeq(db, ENC(db), zColl, 0);
      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
................................................................................
/*
** Recursively delete an expression tree.
*/
static SQLITE_NOINLINE void sqlite3ExprDeleteNN(sqlite3 *db, Expr *p){
  assert( p!=0 );
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );




#ifdef SQLITE_DEBUG
  if( ExprHasProperty(p, EP_Leaf) && !ExprHasProperty(p, EP_TokenOnly) ){
    assert( p->pLeft==0 );
    assert( p->pRight==0 );
    assert( p->x.pSelect==0 );
  }
#endif
................................................................................
    if( p->pRight ){
      sqlite3ExprDeleteNN(db, p->pRight);
    }else if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
    if( !ExprHasProperty(p, EP_Reduced) ){

      sqlite3WindowDelete(db, p->pWin);
    }
  }
  if( ExprHasProperty(p, EP_MemToken) ) sqlite3DbFree(db, p->u.zToken);
  if( !ExprHasProperty(p, EP_Static) ){
    sqlite3DbFreeNN(db, p);
  }
}
................................................................................
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  assert( flags==EXPRDUP_REDUCE || flags==0 ); /* Only one flag value allowed */
  assert( EXPR_FULLSIZE<=0xfff );
  assert( (0xfff & (EP_Reduced|EP_TokenOnly))==0 );
  if( 0==flags || p->op==TK_SELECT_COLUMN 
#ifndef SQLITE_OMIT_WINDOWFUNC
   || p->pWin 
#endif
  ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( !ExprHasProperty(p, EP_MemToken) );
................................................................................
** This function returns the space in bytes required to store the copy 
** of the Expr structure and a copy of the Expr.u.zToken string (if that
** string is defined.)
*/
static int dupedExprNodeSize(Expr *p, int flags){
  int nByte = dupedExprStructSize(p, flags) & 0xfff;
  if( !ExprHasProperty(p, EP_IntValue) && p->u.zToken ){
    nByte += sqlite3Strlen30(p->u.zToken)+1;
  }
  return ROUND8(nByte);
}

/*
** Return the number of bytes required to create a duplicate of the 
** expression passed as the first argument. The second argument is a
................................................................................
        pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, dupFlags);
      }else{
        pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, dupFlags);
      }
    }

    /* Fill in pNew->pLeft and pNew->pRight. */

    zAlloc += dupedExprNodeSize(p, dupFlags);
    if( ExprHasProperty(pNew, EP_Reduced|EP_TokenOnly) ){
      if( !ExprHasProperty(pNew, EP_TokenOnly|EP_Leaf) ){
        pNew->pLeft = p->pLeft ?
                      exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc) : 0;
        pNew->pRight = p->pRight ?
                       exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc) : 0;
      }
    }else{
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(p, EP_Reduced|EP_TokenOnly) ){
        pNew->pWin = 0;
      }else{
        pNew->pWin = sqlite3WindowDup(db, pNew, p->pWin);

      }
#endif /* SQLITE_OMIT_WINDOWFUNC */




      if( !ExprHasProperty(p, EP_TokenOnly|EP_Leaf) ){
        if( pNew->op==TK_SELECT_COLUMN ){
          pNew->pLeft = p->pLeft;
          assert( p->iColumn==0 || p->pRight==0 );
          assert( p->pRight==0  || p->pRight==p->pLeft );
        }else{
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
        }
        pNew->pRight = sqlite3ExprDup(db, p->pRight, 0);
      }
    }
    if( pzBuffer ){
      *pzBuffer = zAlloc;
    }
  }
  return pNew;
}

/*
** Create and return a deep copy of the object passed as the second 
** argument. If an OOM condition is encountered, NULL is returned
................................................................................
    case TK_INTEGER:
    case TK_STRING:
    case TK_FLOAT:
    case TK_BLOB:
      return 0;
    case TK_COLUMN:
      return ExprHasProperty(p, EP_CanBeNull) ||
             p->pTab==0 ||  /* Reference to column of index on expression */
             (p->iColumn>=0 && p->pTab->aCol[p->iColumn].notNull==0);
    default:
      return 1;
  }
}

/*
** Return TRUE if the given expression is a constant which would be
................................................................................
*/
SQLITE_PRIVATE int sqlite3IsRowid(const char *z){
  if( sqlite3StrICmp(z, "_ROWID_")==0 ) return 1;
  if( sqlite3StrICmp(z, "ROWID")==0 ) return 1;
  if( sqlite3StrICmp(z, "OID")==0 ) return 1;
  return 0;
}









/*
** pX is the RHS of an IN operator.  If pX is a SELECT statement 
** that can be simplified to a direct table access, then return
** a pointer to the SELECT statement.  If pX is not a SELECT statement,
** or if the SELECT statement needs to be manifested into a transient
** table, then return NULL.
................................................................................
        /* This COLUMN expression is really a constant due to WHERE clause
        ** constraints, and that constant is coded by the pExpr->pLeft
        ** expresssion.  However, make sure the constant has the correct
        ** datatype by applying the Affinity of the table column to the
        ** constant.
        */
        int iReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft,target);
        int aff = sqlite3TableColumnAffinity(pExpr->pTab, pExpr->iColumn);
        if( aff!=SQLITE_AFF_BLOB ){
          static const char zAff[] = "B\000C\000D\000E";
          assert( SQLITE_AFF_BLOB=='A' );
          assert( SQLITE_AFF_TEXT=='B' );
          if( iReg!=target ){
            sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target);
            iReg = target;
................................................................................
          return pExpr->iColumn - pParse->iSelfTab;
        }else{
          /* Coding an expression that is part of an index where column names
          ** in the index refer to the table to which the index belongs */
          iTab = pParse->iSelfTab - 1;
        }
      }
      return sqlite3ExprCodeGetColumn(pParse, pExpr->pTab,
                               pExpr->iColumn, iTab, target,
                               pExpr->op2);
    }
    case TK_INTEGER: {
      codeInteger(pParse, pExpr, 0, target);
      return target;
    }
................................................................................
      u32 constMask = 0;     /* Mask of function arguments that are constant */
      int i;                 /* Loop counter */
      sqlite3 *db = pParse->db;  /* The database connection */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

#ifndef SQLITE_OMIT_WINDOWFUNC
      if( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) && pExpr->pWin ){
        return pExpr->pWin->regResult;
      }
#endif

      if( ConstFactorOk(pParse) && sqlite3ExprIsConstantNotJoin(pExpr) ){
        /* SQL functions can be expensive. So try to move constant functions
        ** out of the inner loop, even if that means an extra OP_Copy. */
        return sqlite3ExprCodeAtInit(pParse, pExpr, -1);
................................................................................
      **
      ** Then p1 is interpreted as follows:
      **
      **   p1==0   ->    old.rowid     p1==3   ->    new.rowid
      **   p1==1   ->    old.a         p1==4   ->    new.a
      **   p1==2   ->    old.b         p1==5   ->    new.b       
      */
      Table *pTab = pExpr->pTab;
      int p1 = pExpr->iTable * (pTab->nCol+1) + 1 + pExpr->iColumn;

      assert( pExpr->iTable==0 || pExpr->iTable==1 );
      assert( pExpr->iColumn>=-1 && pExpr->iColumn<pTab->nCol );
      assert( pTab->iPKey<0 || pExpr->iColumn!=pTab->iPKey );
      assert( p1>=0 && p1<(pTab->nCol*2+2) );

      sqlite3VdbeAddOp2(v, OP_Param, p1, target);
      VdbeComment((v, "r[%d]=%s.%s", target,
        (pExpr->iTable ? "new" : "old"),
        (pExpr->iColumn<0 ? "rowid" : pExpr->pTab->aCol[pExpr->iColumn].zName)
      ));

#ifndef SQLITE_OMIT_FLOATING_POINT
      /* If the column has REAL affinity, it may currently be stored as an
      ** integer. Use OP_RealAffinity to make sure it is really real.
      **
      ** EVIDENCE-OF: R-60985-57662 SQLite will convert the value back to
................................................................................
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;














    }else if( pA->op==TK_COLLATE ){
      if( sqlite3_stricmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
................................................................................
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    assert( (combinedFlags & EP_Reduced)==0 );
    if( pA->op!=TK_STRING && pA->op!=TK_TRUEFALSE ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }
#ifndef SQLITE_OMIT_WINDOWFUNC
    /* Justification for the assert():
    ** window functions have p->op==TK_FUNCTION but aggregate functions
    ** have p->op==TK_AGG_FUNCTION.  So any comparison between an aggregate
    ** function and a window function should have failed before reaching
    ** this point.  And, it is not possible to have a window function and
    ** a scalar function with the same name and number of arguments.  So
    ** if we reach this point, either A and B both window functions or
    ** neither are a window functions. */
    assert( (pA->pWin==0)==(pB->pWin==0) );

    if( pA->pWin!=0 ){
      if( sqlite3WindowCompare(pParse,pA->pWin,pB->pWin)!=0 ) return 2;
    }
#endif
  }
  return 0;
}

/*
** Compare two ExprList objects.  Return 0 if they are identical and 
** non-zero if they differ in any way.
................................................................................
    case TK_GE:
      testcase( pExpr->op==TK_EQ );
      testcase( pExpr->op==TK_NE );
      testcase( pExpr->op==TK_LT );
      testcase( pExpr->op==TK_LE );
      testcase( pExpr->op==TK_GT );
      testcase( pExpr->op==TK_GE );
      if( (pExpr->pLeft->op==TK_COLUMN && IsVirtual(pExpr->pLeft->pTab))
       || (pExpr->pRight->op==TK_COLUMN && IsVirtual(pExpr->pRight->pTab))
      ){
       return WRC_Prune;
      }
    default:
      return WRC_Continue;
  }
}
................................................................................
                break;
              }
            }
            if( (k>=pAggInfo->nColumn)
             && (k = addAggInfoColumn(pParse->db, pAggInfo))>=0 
            ){
              pCol = &pAggInfo->aCol[k];
              pCol->pTab = pExpr->pTab;
              pCol->iTable = pExpr->iTable;
              pCol->iColumn = pExpr->iColumn;
              pCol->iMem = ++pParse->nMem;
              pCol->iSorterColumn = -1;
              pCol->pExpr = pExpr;
              if( pAggInfo->pGroupBy ){
                int j, n;
................................................................................
  }
}
#else
# define renameTokenCheckAll(x,y)
#endif

/*
** Add a new RenameToken object mapping parse tree element pPtr into
** token *pToken to the Parse object currently under construction.
**
** Return a copy of pPtr.






*/
SQLITE_PRIVATE void *sqlite3RenameTokenMap(Parse *pParse, void *pPtr, Token *pToken){
  RenameToken *pNew;
  assert( pPtr || pParse->db->mallocFailed );
  renameTokenCheckAll(pParse, pPtr);
  pNew = sqlite3DbMallocZero(pParse->db, sizeof(RenameToken));
  if( pNew ){
................................................................................
  if( pExpr->op==TK_TRIGGER 
   && pExpr->iColumn==p->iCol 
   && pWalker->pParse->pTriggerTab==p->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }else if( pExpr->op==TK_COLUMN 
   && pExpr->iColumn==p->iCol 
   && p->pTab==pExpr->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }
  return WRC_Continue;
}

/*
................................................................................
  memset(&sNC, 0, sizeof(sNC));
  sNC.pParse = pParse;
  assert( pNew->pTabSchema );
  pParse->pTriggerTab = sqlite3FindTable(db, pNew->table, 
      db->aDb[sqlite3SchemaToIndex(db, pNew->pTabSchema)].zDbSName
  );
  pParse->eTriggerOp = pNew->op;






  /* Resolve symbols in WHEN clause */
  if( pNew->pWhen ){
    rc = sqlite3ResolveExprNames(&sNC, pNew->pWhen);
  }

  for(pStep=pNew->step_list; rc==SQLITE_OK && pStep; pStep=pStep->pNext){
    if( pStep->pSelect ){
      sqlite3SelectPrep(pParse, pStep->pSelect, &sNC);
      if( pParse->nErr ) rc = pParse->rc;
................................................................................
**   8. bTemp:    True if zSql comes from temp schema
**
** Do a column rename operation on the CREATE statement given in zSql.
** The iCol-th column (left-most is 0) of table zTable is renamed from zCol
** into zNew.  The name should be quoted if bQuote is true.
**
** This function is used internally by the ALTER TABLE RENAME COLUMN command.
** Though accessible to application code, it is not intended for use by
** applications.  The existance of this function, and the way it works,
** is subject to change without notice.
**
** If any of the parameters are out-of-bounds, then simply return NULL.
** An out-of-bounds parameter can only occur when the application calls
** this function directly.  The parameters will always be well-formed when
** this routine is invoked by the bytecode for a legitimate ALTER TABLE
** statement.
*/
static void renameColumnFunc(
  sqlite3_context *context,
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
................................................................................
}

/*
** Walker expression callback used by "RENAME TABLE". 
*/
static int renameTableExprCb(Walker *pWalker, Expr *pExpr){
  RenameCtx *p = pWalker->u.pRename;
  if( pExpr->op==TK_COLUMN && p->pTab==pExpr->pTab ){
    renameTokenFind(pWalker->pParse, p, (void*)&pExpr->pTab);
  }
  return WRC_Continue;
}

/*
** Walker select callback used by "RENAME TABLE". 
*/
................................................................................
            sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
            if( sParse.nErr ) rc = sParse.rc;
            sqlite3WalkSelect(&sWalker, pTab->pSelect);
          }
        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( db->flags & SQLITE_ForeignKeys ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
                renameTokenFind(&sParse, &sCtx, (void*)pFKey->zTo);
              }
            }
          }
................................................................................
}

/*
** Register built-in functions used to help implement ALTER TABLE
*/
SQLITE_PRIVATE void sqlite3AlterFunctions(void){
  static FuncDef aAlterTableFuncs[] = {
    FUNCTION(sqlite_rename_column,  9, 0, 0, renameColumnFunc),
    FUNCTION(sqlite_rename_table,  7, 0, 0, renameTableFunc),
    FUNCTION(sqlite_rename_test,  5, 0, 0, renameTableTest),
  };
  sqlite3InsertBuiltinFuncs(aAlterTableFuncs, ArraySize(aAlterTableFuncs));
}
#endif  /* SQLITE_ALTER_TABLE */

/************** End of alter.c ***********************************************/
/************** Begin file analyze.c *****************************************/
................................................................................
    ** reopen it as a MemDB */
    pVfs = sqlite3_vfs_find("memdb");
    if( pVfs==0 ) return;
    pNew = &db->aDb[db->init.iDb];
    if( pNew->pBt ) sqlite3BtreeClose(pNew->pBt);
    pNew->pBt = 0;
    pNew->pSchema = 0;
    rc = sqlite3BtreeOpen(pVfs, "x", db, &pNew->pBt, 0, SQLITE_OPEN_MAIN_DB);
  }else{
    /* This is a real ATTACH
    **
    ** Check for the following errors:
    **
    **     * Too many attached databases,
    **     * Transaction currently open
................................................................................
  Table *pTab = 0;      /* The table being read */
  const char *zCol;     /* Name of the column of the table */
  int iSrc;             /* Index in pTabList->a[] of table being read */
  int iDb;              /* The index of the database the expression refers to */
  int iCol;             /* Index of column in table */

  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );

  if( db->xAuth==0 ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
  if( iDb<0 ){
    /* An attempt to read a column out of a subquery or other
    ** temporary table. */
    return;
  }
................................................................................
){
  sqlite3 *db = pParse->db;
  int rc;

  /* Don't do any authorization checks if the database is initialising
  ** or if the parser is being invoked from within sqlite3_declare_vtab.
  */

  if( db->init.busy || IN_SPECIAL_PARSE ){
    return SQLITE_OK;
  }

  if( db->xAuth==0 ){
    return SQLITE_OK;
  }
................................................................................
    return 0;
  }

  p = sqlite3FindTable(db, zName, zDbase);
  if( p==0 ){
    const char *zMsg = flags & LOCATE_VIEW ? "no such view" : "no such table";
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if( sqlite3FindDbName(db, zDbase)<1 ){
      /* If zName is the not the name of a table in the schema created using
      ** CREATE, then check to see if it is the name of an virtual table that
      ** can be an eponymous virtual table. */
      Module *pMod = (Module*)sqlite3HashFind(&db->aModule, zName);
      if( pMod==0 && sqlite3_strnicmp(zName, "pragma_", 7)==0 ){
        pMod = sqlite3PragmaVtabRegister(db, zName);
      }
      if( pMod && sqlite3VtabEponymousTableInit(pParse, pMod) ){
        return pMod->pEpoTab;
      }
    }
#endif
    if( (flags & LOCATE_NOERR)==0 ){
      if( zDbase ){
        sqlite3ErrorMsg(pParse, "%s: %s.%s", zMsg, zDbase, zName);
      }else{
        sqlite3ErrorMsg(pParse, "%s: %s", zMsg, zName);
................................................................................
/*
** Erase all schema information from all attached databases (including
** "main" and "temp") for a single database connection.
*/
SQLITE_PRIVATE void sqlite3ResetAllSchemasOfConnection(sqlite3 *db){
  int i;
  sqlite3BtreeEnterAll(db);
  assert( db->nSchemaLock==0 );
  for(i=0; i<db->nDb; i++){
    Db *pDb = &db->aDb[i];
    if( pDb->pSchema ){

      sqlite3SchemaClear(pDb->pSchema);



    }
  }
  db->mDbFlags &= ~(DBFLAG_SchemaChange|DBFLAG_SchemaKnownOk);
  sqlite3VtabUnlockList(db);
  sqlite3BtreeLeaveAll(db);

  sqlite3CollapseDatabaseArray(db);

}

/*
** This routine is called when a commit occurs.
*/
SQLITE_PRIVATE void sqlite3CommitInternalChanges(sqlite3 *db){
  db->mDbFlags &= ~DBFLAG_SchemaChange;
................................................................................
  }

  /* Delete any foreign keys attached to this table. */
  sqlite3FkDelete(db, pTable);

  /* Delete the Table structure itself.
  */






  sqlite3DeleteColumnNames(db, pTable);
  sqlite3DbFree(db, pTable->zName);
  sqlite3DbFree(db, pTable->zColAff);
  sqlite3SelectDelete(db, pTable->pSelect);
  sqlite3ExprListDelete(db, pTable->pCheck);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3VtabClear(db, pTable);
................................................................................
    assert( db->init.iDb==0 || db->init.busy || IN_RENAME_OBJECT
             || (db->mDbFlags & DBFLAG_Vacuum)!=0);
    iDb = db->init.iDb;
    *pUnqual = pName1;
  }
  return iDb;
}















/*
** This routine is used to check if the UTF-8 string zName is a legal
** unqualified name for a new schema object (table, index, view or
** trigger). All names are legal except those that begin with the string
** "sqlite_" (in upper, lower or mixed case). This portion of the namespace
** is reserved for internal use.
*/
SQLITE_PRIVATE int sqlite3CheckObjectName(Parse *pParse, const char *zName){
  if( !pParse->db->init.busy && pParse->nested==0 
          && (pParse->db->flags & SQLITE_WriteSchema)==0
          && 0==sqlite3StrNICmp(zName, "sqlite_", 7) ){
    sqlite3ErrorMsg(pParse, "object name reserved for internal use: %s", zName);
    return SQLITE_ERROR;
  }
  return SQLITE_OK;
}

................................................................................
    assert( pTab->nCol==j );
  }else{
    pPk->nColumn = pTab->nCol;
  }
  recomputeColumnsNotIndexed(pPk);
}































/*
** This routine is called to report the final ")" that terminates
** a CREATE TABLE statement.
**
** The table structure that other action routines have been building
** is added to the internal hash tables, assuming no errors have
** occurred.
................................................................................

  if( pEnd==0 && pSelect==0 ){
    return;
  }
  assert( !db->mallocFailed );
  p = pParse->pNewTable;
  if( p==0 ) return;





  /* If the db->init.busy is 1 it means we are reading the SQL off the
  ** "sqlite_master" or "sqlite_temp_master" table on the disk.
  ** So do not write to the disk again.  Extract the root page number
  ** for the table from the db->init.newTnum field.  (The page number
  ** should have been put there by the sqliteOpenCb routine.)
  **
................................................................................
** Also write code to modify the sqlite_master table and internal schema
** if a root-page of another table is moved by the btree-layer whilst
** erasing iTable (this can happen with an auto-vacuum database).
*/ 
static void destroyRootPage(Parse *pParse, int iTable, int iDb){
  Vdbe *v = sqlite3GetVdbe(pParse);
  int r1 = sqlite3GetTempReg(pParse);
  assert( iTable>1 );
  sqlite3VdbeAddOp3(v, OP_Destroy, iTable, r1, iDb);
  sqlite3MayAbort(pParse);
#ifndef SQLITE_OMIT_AUTOVACUUM
  /* OP_Destroy stores an in integer r1. If this integer
  ** is non-zero, then it is the root page number of a table moved to
  ** location iTable. The following code modifies the sqlite_master table to
  ** reflect this.
................................................................................
  for(p=sqlite3BuiltinFunctions.a[h]; p; p=p->u.pHash){
    if( sqlite3StrICmp(p->zName, zFunc)==0 ){
      return p;
    }
  }
  return 0;
}
















/*
** Insert a new FuncDef into a FuncDefHash hash table.
*/
SQLITE_PRIVATE void sqlite3InsertBuiltinFuncs(
  FuncDef *aDef,      /* List of global functions to be inserted */
  int nDef            /* Length of the apDef[] list */
){
  int i;
  for(i=0; i<nDef; i++){
    FuncDef *pOther;
    const char *zName = aDef[i].zName;
    int nName = sqlite3Strlen30(zName);
    int h = (zName[0] + nName) % SQLITE_FUNC_HASH_SZ;
    assert( zName[0]>='a' && zName[0]<='z' );
    pOther = functionSearch(h, zName);
    if( pOther ){
      assert( pOther!=&aDef[i] && pOther->pNext!=&aDef[i] );
      aDef[i].pNext = pOther->pNext;
      pOther->pNext = &aDef[i];
    }else{
................................................................................
  ** install a new function.  Whatever FuncDef structure is returned it will
  ** have fields overwritten with new information appropriate for the
  ** new function.  But the FuncDefs for built-in functions are read-only.
  ** So we must not search for built-ins when creating a new function.
  */ 
  if( !createFlag && (pBest==0 || (db->mDbFlags & DBFLAG_PreferBuiltin)!=0) ){
    bestScore = 0;
    h = (sqlite3UpperToLower[(u8)zName[0]] + nName) % SQLITE_FUNC_HASH_SZ;
    p = functionSearch(h, zName);
    while( p ){
      int score = matchQuality(p, nArg, enc);
      if( score>bestScore ){
        pBest = p;
        bestScore = score;
      }
................................................................................
    pTab->nTabRef++;
  }
  if( sqlite3IndexedByLookup(pParse, pItem) ){
    pTab = 0;
  }
  return pTab;
}


































/*
** Check to make sure the given table is writable.  If it is not
** writable, generate an error message and return 1.  If it is
** writable return 0;
*/
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  /* A table is not writable under the following circumstances:
  **
  **   1) It is a virtual table and no implementation of the xUpdate method
  **      has been provided, or
  **   2) It is a system table (i.e. sqlite_master), this call is not
  **      part of a nested parse and writable_schema pragma has not 
  **      been specified.
  **
  ** In either case leave an error message in pParse and return non-zero.
  */
  if( ( IsVirtual(pTab) 
     && sqlite3GetVTable(pParse->db, pTab)->pMod->pModule->xUpdate==0 )
   || ( (pTab->tabFlags & TF_Readonly)!=0
     && (pParse->db->flags & SQLITE_WriteSchema)==0
     && pParse->nested==0 )
  ){
    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
    return 1;
  }

#ifndef SQLITE_OMIT_VIEW
  if( !viewOk && pTab->pSelect ){
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
  }
#endif
  return 0;
................................................................................
  sqlite3 *db,      /* The database connection */
  Table *pTab,      /* The table whose column is desired */
  int iCursor,      /* The open cursor on the table */
  i16 iCol          /* The column that is wanted */
){
  Expr *pExpr = sqlite3Expr(db, TK_COLUMN, 0);
  if( pExpr ){
    pExpr->pTab = pTab;
    pExpr->iTable = iCursor;
    pExpr->iColumn = iCol;
  }
  return pExpr;
}

/*
................................................................................
      zColAff[i] = pTab->aCol[i].affinity;
    }
    do{
      zColAff[i--] = 0;
    }while( i>=0 && zColAff[i]==SQLITE_AFF_BLOB );
    pTab->zColAff = zColAff;
  }

  i = sqlite3Strlen30(zColAff);
  if( i ){
    if( iReg ){
      sqlite3VdbeAddOp4(v, OP_Affinity, iReg, i, 0, zColAff, i);
    }else{
      sqlite3VdbeChangeP4(v, -1, zColAff, i);
    }
  }
................................................................................
 #undef pTrigger
#endif
#ifdef tmask
 #undef tmask
#endif

/*
** Meanings of bits in of pWalker->eCode for checkConstraintUnchanged()

*/
#define CKCNSTRNT_COLUMN   0x01    /* CHECK constraint uses a changing column */
#define CKCNSTRNT_ROWID    0x02    /* CHECK constraint references the ROWID */

/* This is the Walker callback from checkConstraintUnchanged().  Set
** bit 0x01 of pWalker->eCode if
** pWalker->eCode to 0 if this expression node references any of the
** columns that are being modifed by an UPDATE statement.
*/
static int checkConstraintExprNode(Walker *pWalker, Expr *pExpr){
  if( pExpr->op==TK_COLUMN ){
    assert( pExpr->iColumn>=0 || pExpr->iColumn==-1 );
    if( pExpr->iColumn>=0 ){
      if( pWalker->u.aiCol[pExpr->iColumn]>=0 ){
................................................................................
}

/*
** pExpr is a CHECK constraint on a row that is being UPDATE-ed.  The
** only columns that are modified by the UPDATE are those for which
** aiChng[i]>=0, and also the ROWID is modified if chngRowid is true.
**
** Return true if CHECK constraint pExpr does not use any of the
** changing columns (or the rowid if it is changing).  In other words,
** return true if this CHECK constraint can be skipped when validating
** the new row in the UPDATE statement.





*/
static int checkConstraintUnchanged(Expr *pExpr, int *aiChng, int chngRowid){





  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 0;
  w.xExprCallback = checkConstraintExprNode;
  w.u.aiCol = aiChng;
  sqlite3WalkExpr(&w, pExpr);
  if( !chngRowid ){
................................................................................
    testcase( (w.eCode & CKCNSTRNT_ROWID)!=0 );
    w.eCode &= ~CKCNSTRNT_ROWID;
  }
  testcase( w.eCode==0 );
  testcase( w.eCode==CKCNSTRNT_COLUMN );
  testcase( w.eCode==CKCNSTRNT_ROWID );
  testcase( w.eCode==(CKCNSTRNT_ROWID|CKCNSTRNT_COLUMN) );
  return !w.eCode;
}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE
** on table pTab.
**
** The regNewData parameter is the first register in a range that contains
................................................................................
  if( pTab->pCheck && (db->flags & SQLITE_IgnoreChecks)==0 ){
    ExprList *pCheck = pTab->pCheck;
    pParse->iSelfTab = -(regNewData+1);
    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    for(i=0; i<pCheck->nExpr; i++){
      int allOk;
      Expr *pExpr = pCheck->a[i].pExpr;
      if( aiChng && checkConstraintUnchanged(pExpr, aiChng, pkChng) ) continue;






      allOk = sqlite3VdbeMakeLabel(v);
      sqlite3VdbeVerifyAbortable(v, onError);
      sqlite3ExprIfTrue(pParse, pExpr, allOk, SQLITE_JUMPIFNULL);
      if( onError==OE_Ignore ){
        sqlite3VdbeGoto(v, ignoreDest);
      }else{
        char *zName = pCheck->a[i].zName;
................................................................................
  void (*str_append)(sqlite3_str*, const char *zIn, int N);
  void (*str_appendall)(sqlite3_str*, const char *zIn);
  void (*str_appendchar)(sqlite3_str*, int N, char C);
  void (*str_reset)(sqlite3_str*);
  int (*str_errcode)(sqlite3_str*);
  int (*str_length)(sqlite3_str*);
  char *(*str_value)(sqlite3_str*);

  int (*create_window_function)(sqlite3*,const char*,int,int,void*,
                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                            void (*xFinal)(sqlite3_context*),
                            void (*xValue)(sqlite3_context*),
                            void (*xInv)(sqlite3_context*,int,sqlite3_value**),
                            void(*xDestroy)(void*));


};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/
typedef int (*sqlite3_loadext_entry)(
................................................................................
#define sqlite3_str_appendchar         sqlite3_api->str_appendchar
#define sqlite3_str_reset              sqlite3_api->str_reset
#define sqlite3_str_errcode            sqlite3_api->str_errcode
#define sqlite3_str_length             sqlite3_api->str_length
#define sqlite3_str_value              sqlite3_api->str_value
/* Version 3.25.0 and later */
#define sqlite3_create_window_function sqlite3_api->create_window_function


#endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */

#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;
................................................................................

#ifdef SQLITE_OMIT_VIRTUALTABLE
# define sqlite3_create_module 0
# define sqlite3_create_module_v2 0
# define sqlite3_declare_vtab 0
# define sqlite3_vtab_config 0
# define sqlite3_vtab_on_conflict 0

#endif

#ifdef SQLITE_OMIT_SHARED_CACHE
# define sqlite3_enable_shared_cache 0
#endif

#if defined(SQLITE_OMIT_TRACE) || defined(SQLITE_OMIT_DEPRECATED)
................................................................................
  sqlite3_str_appendall,
  sqlite3_str_appendchar,
  sqlite3_str_reset,
  sqlite3_str_errcode,
  sqlite3_str_length,
  sqlite3_str_value,
  /* Version 3.25.0 and later */
  sqlite3_create_window_function






};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.
................................................................................
#define PragTyp_TEMP_STORE_DIRECTORY          36
#define PragTyp_THREADS                       37
#define PragTyp_WAL_AUTOCHECKPOINT            38
#define PragTyp_WAL_CHECKPOINT                39
#define PragTyp_ACTIVATE_EXTENSIONS           40
#define PragTyp_HEXKEY                        41
#define PragTyp_KEY                           42
#define PragTyp_REKEY                         43
#define PragTyp_LOCK_STATUS                   44
#define PragTyp_PARSER_TRACE                  45
#define PragTyp_STATS                         46

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_ReadOnly   0x08 /* Read-only HEADER_VALUE */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
................................................................................
#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */

/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "cache_size",  /* Used by: default_cache_size */
  /*   1 */ "cid",         /* Used by: table_info */
  /*   2 */ "name",       
  /*   3 */ "type",       
  /*   4 */ "notnull",    
  /*   5 */ "dflt_value", 
  /*   6 */ "pk",         
  /*   7 */ "tbl",         /* Used by: stats */
  /*   8 */ "idx",        
  /*   9 */ "wdth",       
  /*  10 */ "hght",       
  /*  11 */ "flgs",       
  /*  12 */ "seqno",       /* Used by: index_info */
  /*  13 */ "cid",        
  /*  14 */ "name",       

  /*  15 */ "seqno",       /* Used by: index_xinfo */
  /*  16 */ "cid",        
  /*  17 */ "name",       
  /*  18 */ "desc",       
  /*  19 */ "coll",       
  /*  20 */ "key",        
  /*  21 */ "seq",         /* Used by: index_list */
  /*  22 */ "name",       
  /*  23 */ "unique",     
  /*  24 */ "origin",     
  /*  25 */ "partial",    
  /*  26 */ "seq",         /* Used by: database_list */
  /*  27 */ "name",       
  /*  28 */ "file",       
  /*  29 */ "name",        /* Used by: function_list */
  /*  30 */ "builtin",    
  /*  31 */ "name",        /* Used by: module_list pragma_list */
  /*  32 */ "seq",         /* Used by: collation_list */
  /*  33 */ "name",       
  /*  34 */ "id",          /* Used by: foreign_key_list */

  /*  35 */ "seq",        
  /*  36 */ "table",      
  /*  37 */ "from",       
  /*  38 */ "to",         

  /*  39 */ "on_update",  
  /*  40 */ "on_delete",  
  /*  41 */ "match",      
  /*  42 */ "table",       /* Used by: foreign_key_check */
  /*  43 */ "rowid",      


  /*  44 */ "parent",     
  /*  45 */ "fkid",       
  /*  46 */ "busy",        /* Used by: wal_checkpoint */
  /*  47 */ "log",        
  /*  48 */ "checkpointed",
  /*  49 */ "timeout",     /* Used by: busy_timeout */
  /*  50 */ "database",    /* Used by: lock_status */
  /*  51 */ "status",     
};

/* Definitions of all built-in pragmas */
typedef struct PragmaName {
  const char *const zName; /* Name of pragma */
  u8 ePragTyp;             /* PragTyp_XXX value */
  u8 mPragFlg;             /* Zero or more PragFlg_XXX values */
  u8 iPragCName;           /* Start of column names in pragCName[] */
  u8 nPragCName;           /* Num of col names. 0 means use pragma name */
  u32 iArg;                /* Extra argument */
} PragmaName;
static const PragmaName aPragmaName[] = {
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
 {/* zName:     */ "activate_extensions",
  /* ePragTyp:  */ PragTyp_ACTIVATE_EXTENSIONS,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_AutoIndex },
#endif
#endif
 {/* zName:     */ "busy_timeout",
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 49, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CkptFullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "collation_list",
  /* ePragTyp:  */ PragTyp_COLLATION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 32, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 26, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 42, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 34, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "function_list",
  /* ePragTyp:  */ PragTyp_FUNCTION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 29, 2,
  /* iArg:      */ 0 },
#endif
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "hexkey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "hexrekey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_CHECK)
 {/* zName:     */ "ignore_check_constraints",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 12, 3,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_list",
  /* ePragTyp:  */ PragTyp_INDEX_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_xinfo",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
 {/* zName:     */ "lock_status",
  /* ePragTyp:  */ PragTyp_LOCK_STATUS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 50, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
................................................................................
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_VIRTUALTABLE)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "module_list",
  /* ePragTyp:  */ PragTyp_MODULE_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 31, 1,
  /* iArg:      */ 0 },
#endif
#endif
#endif
 {/* zName:     */ "optimize",
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 31, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "query_only",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_RecTriggers },
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "rekey",
  /* ePragTyp:  */ PragTyp_REKEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "reverse_unordered_selects",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ReverseOrder },
................................................................................
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 7, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 1, 6,
  /* iArg:      */ 0 },





#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "temp_store_directory",
  /* ePragTyp:  */ PragTyp_TEMP_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },












#endif
 {/* zName:     */ "threads",
  /* ePragTyp:  */ PragTyp_THREADS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
................................................................................
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 46, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 61 on by default, 78 total. */

/************** End of pragma.h **********************************************/
/************** Continuing where we left off in pragma.c *********************/

/*
** Interpret the given string as a safety level.  Return 0 for OFF,
** 1 for ON or NORMAL, 2 for FULL, and 3 for EXTRA.  Return 1 for an empty or 
................................................................................

#ifndef SQLITE_OMIT_FLAG_PRAGMAS
  case PragTyp_FLAG: {
    if( zRight==0 ){
      setPragmaResultColumnNames(v, pPragma);
      returnSingleInt(v, (db->flags & pPragma->iArg)!=0 );
    }else{
      int mask = pPragma->iArg;    /* Mask of bits to set or clear. */
      if( db->autoCommit==0 ){
        /* Foreign key support may not be enabled or disabled while not
        ** in auto-commit mode.  */
        mask &= ~(SQLITE_ForeignKeys);
      }
#if SQLITE_USER_AUTHENTICATION
      if( db->auth.authLevel==UAUTH_User ){
................................................................................
  ** dflt_value: The default value for the column, if any.
  ** pk:         Non-zero for PK fields.
  */
  case PragTyp_TABLE_INFO: if( zRight ){
    Table *pTab;
    pTab = sqlite3LocateTable(pParse, LOCATE_NOERR, zRight, zDb);
    if( pTab ){

      int i, k;
      int nHidden = 0;
      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 6;
      sqlite3CodeVerifySchema(pParse, iDb);
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        if( IsHiddenColumn(pCol) ){

          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );
        sqlite3VdbeMultiLoad(v, 1, "issisi",
               i-nHidden,
               pCol->zName,
               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k);

      }
    }
  }
  break;

#ifdef SQLITE_DEBUG
  case PragTyp_STATS: {
................................................................................
#endif

  case PragTyp_INDEX_INFO: if( zRight ){
    Index *pIdx;
    Table *pTab;
    pIdx = sqlite3FindIndex(db, zRight, zDb);
    if( pIdx ){

      int i;
      int mx;
      if( pPragma->iArg ){
        /* PRAGMA index_xinfo (newer version with more rows and columns) */
        mx = pIdx->nColumn;
        pParse->nMem = 6;
      }else{
        /* PRAGMA index_info (legacy version) */
        mx = pIdx->nKeyCol;
        pParse->nMem = 3;
      }
      pTab = pIdx->pTable;
      sqlite3CodeVerifySchema(pParse, iDb);
      assert( pParse->nMem<=pPragma->nPragCName );
      for(i=0; i<mx; i++){
        i16 cnum = pIdx->aiColumn[i];
        sqlite3VdbeMultiLoad(v, 1, "iisX", i, cnum,
                             cnum<0 ? 0 : pTab->aCol[cnum].zName);
        if( pPragma->iArg ){
          sqlite3VdbeMultiLoad(v, 4, "isiX",
................................................................................

  case PragTyp_INDEX_LIST: if( zRight ){
    Index *pIdx;
    Table *pTab;
    int i;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){

      pParse->nMem = 5;
      sqlite3CodeVerifySchema(pParse, iDb);
      for(pIdx=pTab->pIndex, i=0; pIdx; pIdx=pIdx->pNext, i++){
        const char *azOrigin[] = { "c", "u", "pk" };
        sqlite3VdbeMultiLoad(v, 1, "isisi",
           i,
           pIdx->zName,
           IsUniqueIndex(pIdx),
           azOrigin[pIdx->idxType],
................................................................................
  case PragTyp_FUNCTION_LIST: {
    int i;
    HashElem *j;
    FuncDef *p;
    pParse->nMem = 2;
    for(i=0; i<SQLITE_FUNC_HASH_SZ; i++){
      for(p=sqlite3BuiltinFunctions.a[i]; p; p=p->u.pHash ){

        sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 1);
      }
    }
    for(j=sqliteHashFirst(&db->aFunc); j; j=sqliteHashNext(j)){
      p = (FuncDef*)sqliteHashData(j);
      sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 0);
    }
................................................................................
  case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
    FKey *pFK;
    Table *pTab;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      pFK = pTab->pFKey;
      if( pFK ){

        int i = 0; 
        pParse->nMem = 8;
        sqlite3CodeVerifySchema(pParse, iDb);
        while(pFK){
          int j;
          for(j=0; j<pFK->nCol; j++){
            sqlite3VdbeMultiLoad(v, 1, "iissssss",
                   i,
                   j,
                   pFK->zTo,
................................................................................
    int addrOk;            /* Jump here if the key is OK */
    int *aiCols;           /* child to parent column mapping */

    regResult = pParse->nMem+1;
    pParse->nMem += 4;
    regKey = ++pParse->nMem;
    regRow = ++pParse->nMem;
    sqlite3CodeVerifySchema(pParse, iDb);
    k = sqliteHashFirst(&db->aDb[iDb].pSchema->tblHash);
    while( k ){

      if( zRight ){
        pTab = sqlite3LocateTable(pParse, 0, zRight, zDb);
        k = 0;
      }else{
        pTab = (Table*)sqliteHashData(k);
        k = sqliteHashNext(k);
      }
      if( pTab==0 || pTab->pFKey==0 ) continue;


      sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName);
      if( pTab->nCol+regRow>pParse->nMem ) pParse->nMem = pTab->nCol + regRow;
      sqlite3OpenTable(pParse, 0, iDb, pTab, OP_OpenRead);
      sqlite3VdbeLoadString(v, regResult, pTab->zName);
      for(i=1, pFK=pTab->pFKey; pFK; i++, pFK=pFK->pNextFrom){
        pParent = sqlite3FindTable(db, pFK->zTo, zDb);
        if( pParent==0 ) continue;
        pIdx = 0;
        sqlite3TableLock(pParse, iDb, pParent->tnum, 0, pParent->zName);
        x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, 0);
        if( x==0 ){
          if( pIdx==0 ){
            sqlite3OpenTable(pParse, i, iDb, pParent, OP_OpenRead);
          }else{
            sqlite3VdbeAddOp3(v, OP_OpenRead, i, pIdx->tnum, iDb);
            sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
          }
        }else{
          k = 0;
          break;
        }
      }
................................................................................
      sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zDbSName, zState);
    }
    break;
  }
#endif

#ifdef SQLITE_HAS_CODEC









  case PragTyp_KEY: {



    if( zRight ) sqlite3_key_v2(db, zDb, zRight, sqlite3Strlen30(zRight));
    break;


  }
  case PragTyp_REKEY: {
    if( zRight ) sqlite3_rekey_v2(db, zDb, zRight, sqlite3Strlen30(zRight));

    break;
  }
  case PragTyp_HEXKEY: {
    if( zRight ){
      u8 iByte;
      int i;
      char zKey[40];
      for(i=0, iByte=0; i<sizeof(zKey)*2 && sqlite3Isxdigit(zRight[i]); i++){
        iByte = (iByte<<4) + sqlite3HexToInt(zRight[i]);
        if( (i&1)!=0 ) zKey[i/2] = iByte;
      }
      if( (zLeft[3] & 0xf)==0xb ){
        sqlite3_key_v2(db, zDb, zKey, i/2);
      }else{
        sqlite3_rekey_v2(db, zDb, zKey, i/2);
      }
    }
    break;
  }
................................................................................
  0,                           /* xSync - sync transaction */
  0,                           /* xCommit - commit transaction */
  0,                           /* xRollback - rollback transaction */
  0,                           /* xFindFunction - function overloading */
  0,                           /* xRename - rename the table */
  0,                           /* xSavepoint */
  0,                           /* xRelease */
  0                            /* xRollbackTo */

};

/*
** Check to see if zTabName is really the name of a pragma.  If it is,
** then register an eponymous virtual table for that pragma and return
** a pointer to the Module object for the new virtual table.
*/
................................................................................
    }
#endif
  }
  if( db->mallocFailed ){
    rc = SQLITE_NOMEM_BKPT;
    sqlite3ResetAllSchemasOfConnection(db);
  }
  if( rc==SQLITE_OK || (db->flags&SQLITE_WriteSchema)){
    /* Black magic: If the SQLITE_WriteSchema flag is set, then consider
    ** the schema loaded, even if errors occurred. In this situation the 
    ** current sqlite3_prepare() operation will fail, but the following one
    ** will attempt to compile the supplied statement against whatever subset
    ** of the schema was loaded before the error occurred. The primary
    ** purpose of this is to allow access to the sqlite_master table
    ** even when its contents have been corrupted.
    */
................................................................................
  sqlite3BtreeLeaveAll(db);
  rc = sqlite3ApiExit(db, rc);
  assert( (rc&db->errMask)==rc );
  sqlite3_mutex_leave(db->mutex);
  return rc;
}

































































































































































































































































































/*
** Rerun the compilation of a statement after a schema change.
**
** If the statement is successfully recompiled, return SQLITE_OK. Otherwise,
** if the statement cannot be recompiled because another connection has
** locked the sqlite3_master table, return SQLITE_LOCKED. If any other error
** occurs, return SQLITE_SCHEMA.
................................................................................
  int i;
  int nDefer = 0;
  ExprList *pExtra = 0;
  for(i=0; i<pEList->nExpr; i++){
    struct ExprList_item *pItem = &pEList->a[i];
    if( pItem->u.x.iOrderByCol==0 ){
      Expr *pExpr = pItem->pExpr;
      Table *pTab = pExpr->pTab;
      if( pExpr->op==TK_COLUMN && pExpr->iColumn>=0 && pTab && !IsVirtual(pTab)
       && (pTab->aCol[pExpr->iColumn].colFlags & COLFLAG_SORTERREF)
      ){
        int j;
        for(j=0; j<nDefer; j++){
          if( pSort->aDefer[j].iCsr==pExpr->iTable ) break;
        }
................................................................................
              pPk = sqlite3PrimaryKeyIndex(pTab);
              nKey = pPk->nKeyCol;
            }
            for(k=0; k<nKey; k++){
              Expr *pNew = sqlite3PExpr(pParse, TK_COLUMN, 0, 0);
              if( pNew ){
                pNew->iTable = pExpr->iTable;
                pNew->pTab = pExpr->pTab;
                pNew->iColumn = pPk ? pPk->aiColumn[k] : -1;
                pExtra = sqlite3ExprListAppend(pParse, pExtra, pNew);
              }
            }
            pSort->aDefer[nDefer].pTab = pExpr->pTab;
            pSort->aDefer[nDefer].iCsr = pExpr->iTable;
            pSort->aDefer[nDefer].nKey = nKey;
            nDefer++;
          }
        }
        pItem->bSorterRef = 1;
      }
................................................................................
        ** This is not a problem, as the column type of "t1.col" is never
        ** used. When columnType() is called on the expression 
        ** "(SELECT t1.col)", the correct type is returned (see the TK_SELECT
        ** branch below.  */
        break;
      }

      assert( pTab && pExpr->pTab==pTab );
      if( pS ){
        /* The "table" is actually a sub-select or a view in the FROM clause
        ** of the SELECT statement. Return the declaration type and origin
        ** data for the result-set column of the sub-select.
        */
        if( iCol>=0 && iCol<pS->pEList->nExpr ){
          /* If iCol is less than zero, then the expression requests the
................................................................................
  srcName = (db->flags & SQLITE_ShortColNames)!=0 || fullName;
  sqlite3VdbeSetNumCols(v, pEList->nExpr);
  for(i=0; i<pEList->nExpr; i++){
    Expr *p = pEList->a[i].pExpr;

    assert( p!=0 );
    assert( p->op!=TK_AGG_COLUMN );  /* Agg processing has not run yet */
    assert( p->op!=TK_COLUMN || p->pTab!=0 ); /* Covering idx not yet coded */
    if( pEList->a[i].zName ){
      /* An AS clause always takes first priority */
      char *zName = pEList->a[i].zName;
      sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_TRANSIENT);
    }else if( srcName && p->op==TK_COLUMN ){
      char *zCol;
      int iCol = p->iColumn;
      pTab = p->pTab;
      assert( pTab!=0 );
      if( iCol<0 ) iCol = pTab->iPKey;
      assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
      if( iCol<0 ){
        zCol = "rowid";
      }else{
        zCol = pTab->aCol[iCol].zName;
................................................................................
        pColExpr = pColExpr->pRight;
        assert( pColExpr!=0 );
      }
      assert( pColExpr->op!=TK_AGG_COLUMN );
      if( pColExpr->op==TK_COLUMN ){
        /* For columns use the column name name */
        int iCol = pColExpr->iColumn;
        Table *pTab = pColExpr->pTab;
        assert( pTab!=0 );
        if( iCol<0 ) iCol = pTab->iPKey;
        zName = iCol>=0 ? pTab->aCol[iCol].zName : "rowid";
      }else if( pColExpr->op==TK_ID ){
        assert( !ExprHasProperty(pColExpr, EP_IntValue) );
        zName = pColExpr->u.zToken;
      }else{
................................................................................
  }
#ifndef SQLITE_OMIT_FLOATING_POINT
  if( pTab->aCol[i].affinity==SQLITE_AFF_REAL ){
    sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
  }
#endif
}




















































/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
**          \_______/ \________/     \______/       \________________/
*            onError   pTabList      pChanges             pWhere
................................................................................
  pTabList->a[0].colUsed = IsVirtual(pTab) ? ALLBITS : 0;

  hasFK = sqlite3FkRequired(pParse, pTab, aXRef, chngKey);

  /* There is one entry in the aRegIdx[] array for each index on the table
  ** being updated.  Fill in aRegIdx[] with a register number that will hold
  ** the key for accessing each index.
  **
  ** FIXME:  Be smarter about omitting indexes that use expressions.
  */
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( chngKey || hasFK>1 || pIdx->pPartIdxWhere || pIdx==pPk ){


      reg = ++pParse->nMem;
      pParse->nMem += pIdx->nColumn;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nKeyCol; i++){
        i16 iIdxCol = pIdx->aiColumn[i];
        if( iIdxCol<0 || aXRef[iIdxCol]>=0 ){
          reg = ++pParse->nMem;
          pParse->nMem += pIdx->nColumn;
          if( (onError==OE_Replace)
           || (onError==OE_Default && pIdx->onError==OE_Replace) 
          ){
            bReplace = 1;
          }
................................................................................
  saved_flags = db->flags;
  saved_mDbFlags = db->mDbFlags;
  saved_nChange = db->nChange;
  saved_nTotalChange = db->nTotalChange;
  saved_mTrace = db->mTrace;
  db->flags |= SQLITE_WriteSchema | SQLITE_IgnoreChecks;
  db->mDbFlags |= DBFLAG_PreferBuiltin | DBFLAG_Vacuum;
  db->flags &= ~(SQLITE_ForeignKeys | SQLITE_ReverseOrder | SQLITE_CountRows);

  db->mTrace = 0;

  zDbMain = db->aDb[iDb].zDbSName;
  pMain = db->aDb[iDb].pBt;
  isMemDb = sqlite3PagerIsMemdb(sqlite3BtreePager(pMain));

  /* Attach the temporary database as 'vacuum_db'. The synchronous pragma
................................................................................
SQLITE_PRIVATE void sqlite3VtabBeginParse(
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName,   /* Name of the module for the virtual table */
  int ifNotExists       /* No error if the table already exists */
){
  int iDb;              /* The database the table is being created in */
  Table *pTable;        /* The new virtual table */
  sqlite3 *db;          /* Database connection */

  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, ifNotExists);
  pTable = pParse->pNewTable;
  if( pTable==0 ) return;
  assert( 0==pTable->pIndex );

  db = pParse->db;
  iDb = sqlite3SchemaToIndex(db, pTable->pSchema);
  assert( iDb>=0 );

  assert( pTable->nModuleArg==0 );
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));
  assert( (pParse->sNameToken.z==pName2->z && pName2->z!=0)
       || (pParse->sNameToken.z==pName1->z && pName2->z==0)
................................................................................
#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */
  if( pTable->azModuleArg ){


    sqlite3AuthCheck(pParse, SQLITE_CREATE_VTABLE, pTable->zName, 
            pTable->azModuleArg[0], pParse->db->aDb[iDb].zDbSName);
  }
#endif
}

/*
................................................................................
  void *pArg = 0;
  FuncDef *pNew;
  int rc = 0;

  /* Check to see the left operand is a column in a virtual table */
  if( NEVER(pExpr==0) ) return pDef;
  if( pExpr->op!=TK_COLUMN ) return pDef;
  pTab = pExpr->pTab;
  if( pTab==0 ) return pDef;
  if( !IsVirtual(pTab) ) return pDef;
  pVtab = sqlite3GetVTable(db, pTab)->pVtab;
  assert( pVtab!=0 );
  assert( pVtab->pModule!=0 );
  pMod = (sqlite3_module *)pVtab->pModule;
  if( pMod->xFindFunction==0 ) return pDef;
................................................................................
  WhereLoop *pNew;          /* Template WhereLoop */
  WhereOrSet *pOrSet;       /* Record best loops here, if not NULL */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  UnpackedRecord *pRec;     /* Probe for stat4 (if required) */
  int nRecValid;            /* Number of valid fields currently in pRec */
#endif
  unsigned int bldFlags;    /* SQLITE_BLDF_* flags */

};

/* Allowed values for WhereLoopBuider.bldFlags */
#define SQLITE_BLDF_INDEXED  0x0001   /* An index is used */
#define SQLITE_BLDF_UNIQUE   0x0002   /* All keys of a UNIQUE index used */





















/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.
................................................................................
*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(0, pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
  }
}

/*
................................................................................
        */
        if( sqlite3Isdigit(zNew[0])
         || zNew[0]=='-'
         || (zNew[0]+1=='0' && iTo==1)
        ){
          if( pLeft->op!=TK_COLUMN 
           || sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT 
           || IsVirtual(pLeft->pTab)  /* Value might be numeric */
          ){
            sqlite3ExprDelete(db, pPrefix);
            sqlite3ValueFree(pVal);
            return 0;
          }
        }
      }
................................................................................
    ** virtual table on their second argument, which is the same as
    ** the left-hand side operand in their in-fix form.
    **
    **       vtab_column MATCH expression
    **       MATCH(expression,vtab_column)
    */
    pCol = pList->a[1].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->pTab) ){
      for(i=0; i<ArraySize(aOp); i++){
        if( sqlite3StrICmp(pExpr->u.zToken, aOp[i].zOp)==0 ){
          *peOp2 = aOp[i].eOp2;
          *ppRight = pList->a[0].pExpr;
          *ppLeft = pCol;
          return 1;
        }
................................................................................
    **      OVERLOADED(vtab_column,expression)
    **
    ** Historically, xFindFunction expected to see lower-case function
    ** names.  But for this use case, xFindFunction is expected to deal
    ** with function names in an arbitrary case.
    */
    pCol = pList->a[0].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->pTab) ){
      sqlite3_vtab *pVtab;
      sqlite3_module *pMod;
      void (*xNotUsed)(sqlite3_context*,int,sqlite3_value**);
      void *pNotUsed;
      pVtab = sqlite3GetVTable(db, pCol->pTab)->pVtab;
      assert( pVtab!=0 );
      assert( pVtab->pModule!=0 );
      pMod = (sqlite3_module *)pVtab->pModule;
      if( pMod->xFindFunction!=0 ){
        i = pMod->xFindFunction(pVtab,2, pExpr->u.zToken, &xNotUsed, &pNotUsed);
        if( i>=SQLITE_INDEX_CONSTRAINT_FUNCTION ){
          *peOp2 = i;
................................................................................
        }
      }
    }
  }else if( pExpr->op==TK_NE || pExpr->op==TK_ISNOT || pExpr->op==TK_NOTNULL ){
    int res = 0;
    Expr *pLeft = pExpr->pLeft;
    Expr *pRight = pExpr->pRight;
    if( pLeft->op==TK_COLUMN && IsVirtual(pLeft->pTab) ){
      res++;
    }
    if( pRight && pRight->op==TK_COLUMN && IsVirtual(pRight->pTab) ){
      res++;
      SWAP(Expr*, pLeft, pRight);
    }
    *ppLeft = pLeft;
    *ppRight = pRight;
    if( pExpr->op==TK_NE ) *peOp2 = SQLITE_INDEX_CONSTRAINT_NE;
    if( pExpr->op==TK_ISNOT ) *peOp2 = SQLITE_INDEX_CONSTRAINT_ISNOT;
................................................................................
  Expr *pTerm;
  if( pItem->fg.isTabFunc==0 ) return;
  pTab = pItem->pTab;
  assert( pTab!=0 );
  pArgs = pItem->u1.pFuncArg;
  if( pArgs==0 ) return;
  for(j=k=0; j<pArgs->nExpr; j++){

    while( k<pTab->nCol && (pTab->aCol[k].colFlags & COLFLAG_HIDDEN)==0 ){k++;}
    if( k>=pTab->nCol ){
      sqlite3ErrorMsg(pParse, "too many arguments on %s() - max %d",
                      pTab->zName, j);
      return;
    }
    pColRef = sqlite3ExprAlloc(pParse->db, TK_COLUMN, 0, 0);
    if( pColRef==0 ) return;
    pColRef->iTable = pItem->iCursor;
    pColRef->iColumn = k++;
    pColRef->pTab = pTab;
    pTerm = sqlite3PExpr(pParse, TK_EQ, pColRef,
                         sqlite3ExprDup(pParse->db, pArgs->a[j].pExpr, 0));

    whereClauseInsert(pWC, pTerm, TERM_DYNAMIC);
  }
}

/************** End of whereexpr.c *******************************************/
/************** Begin file where.c *******************************************/
/*
................................................................................
  if( pPartial ) sqlite3VdbeResolveLabel(v, iContinue);
  if( pTabItem->fg.viaCoroutine ){
    sqlite3VdbeChangeP2(v, addrCounter, regBase+n);
    testcase( pParse->db->mallocFailed );
    translateColumnToCopy(pParse, addrTop, pLevel->iTabCur,
                          pTabItem->regResult, 1);
    sqlite3VdbeGoto(v, addrTop);
    pTabItem->fg.viaCoroutine = 0;
  }else{
    sqlite3VdbeAddOp2(v, OP_Next, pLevel->iTabCur, addrTop+1); VdbeCoverage(v);
  }
  sqlite3VdbeChangeP5(v, SQLITE_STMTSTATUS_AUTOINDEX);
  sqlite3VdbeJumpHere(v, addrTop);
  sqlite3ReleaseTempReg(pParse, regRecord);
  
................................................................................

/*
** The table object reference passed as the second argument to this function
** must represent a virtual table. This function invokes the xBestIndex()
** method of the virtual table with the sqlite3_index_info object that
** comes in as the 3rd argument to this function.
**
** If an error occurs, pParse is populated with an error message and a
** non-zero value is returned. Otherwise, 0 is returned and the output
** part of the sqlite3_index_info structure is left populated.


**
** Whether or not an error is returned, it is the responsibility of the
** caller to eventually free p->idxStr if p->needToFreeIdxStr indicates
** that this is required.
*/
static int vtabBestIndex(Parse *pParse, Table *pTab, sqlite3_index_info *p){
  sqlite3_vtab *pVtab = sqlite3GetVTable(pParse->db, pTab)->pVtab;
  int rc;

  TRACE_IDX_INPUTS(p);
  rc = pVtab->pModule->xBestIndex(pVtab, p);
  TRACE_IDX_OUTPUTS(p);

  if( rc!=SQLITE_OK ){
    if( rc==SQLITE_NOMEM ){
      sqlite3OomFault(pParse->db);
    }else if( !pVtab->zErrMsg ){
      sqlite3ErrorMsg(pParse, "%s", sqlite3ErrStr(rc));
    }else{
      sqlite3ErrorMsg(pParse, "%s", pVtab->zErrMsg);
    }
  }
  sqlite3_free(pVtab->zErrMsg);
  pVtab->zErrMsg = 0;

#if 0
  /* This error is now caught by the caller.
  ** Search for "xBestIndex malfunction" below */
  for(i=0; i<p->nConstraint; i++){
    if( !p->aConstraint[i].usable && p->aConstraintUsage[i].argvIndex>0 ){
      sqlite3ErrorMsg(pParse, 
          "table %s: xBestIndex returned an invalid plan", pTab->zName);
    }
  }
#endif

  return pParse->nErr;
}
#endif /* !defined(SQLITE_OMIT_VIRTUALTABLE) */

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
/*
** Estimate the location of a particular key among all keys in an
** index.  Store the results in aStat as follows:
................................................................................
**    (4)  The template has the same or lower cost than the current loop
*/
static int whereLoopInsert(WhereLoopBuilder *pBuilder, WhereLoop *pTemplate){
  WhereLoop **ppPrev, *p;
  WhereInfo *pWInfo = pBuilder->pWInfo;
  sqlite3 *db = pWInfo->pParse->db;
  int rc;









  /* If pBuilder->pOrSet is defined, then only keep track of the costs
  ** and prereqs.
  */
  if( pBuilder->pOrSet!=0 ){
    if( pTemplate->nLTerm ){
#if WHERETRACE_ENABLED
................................................................................
  pIdxInfo->estimatedCost = SQLITE_BIG_DBL / (double)2;
  pIdxInfo->estimatedRows = 25;
  pIdxInfo->idxFlags = 0;
  pIdxInfo->colUsed = (sqlite3_int64)pSrc->colUsed;

  /* Invoke the virtual table xBestIndex() method */
  rc = vtabBestIndex(pParse, pSrc->pTab, pIdxInfo);









  if( rc ) return rc;


  mxTerm = -1;
  assert( pNew->nLSlot>=nConstraint );
  for(i=0; i<nConstraint; i++) pNew->aLTerm[i] = 0;
  pNew->u.vtab.omitMask = 0;
  pIdxCons = *(struct sqlite3_index_constraint**)&pIdxInfo->aConstraint;
  for(i=0; i<nConstraint; i++, pIdxCons++){
................................................................................
  int rc = SQLITE_OK;
  WhereLoop *pNew;
  u8 priorJointype = 0;

  /* Loop over the tables in the join, from left to right */
  pNew = pBuilder->pNew;
  whereLoopInit(pNew);

  for(iTab=0, pItem=pTabList->a; pItem<pEnd; iTab++, pItem++){
    Bitmask mUnusable = 0;
    pNew->iTab = iTab;

    pNew->maskSelf = sqlite3WhereGetMask(&pWInfo->sMaskSet, pItem->iCursor);
    if( ((pItem->fg.jointype|priorJointype) & (JT_LEFT|JT_CROSS))!=0 ){
      /* This condition is true when pItem is the FROM clause term on the
      ** right-hand-side of a LEFT or CROSS JOIN.  */
      mPrereq = mPrior;
    }
    priorJointype = pItem->fg.jointype;
................................................................................
    {
      rc = whereLoopAddBtree(pBuilder, mPrereq);
    }
    if( rc==SQLITE_OK && pBuilder->pWC->hasOr ){
      rc = whereLoopAddOr(pBuilder, mPrereq, mUnusable);
    }
    mPrior |= pNew->maskSelf;
    if( rc || db->mallocFailed ) break;








  }

  whereLoopClear(db, pNew);
  return rc;
}

/*
................................................................................
      if( i==nSrc ) return WRC_Continue;
    }
  }

  switch( pExpr->op ){

    case TK_FUNCTION:
      if( pExpr->pWin==0 ){
        break;
      }else{
        Window *pWin;
        for(pWin=p->pWin; pWin; pWin=pWin->pNextWin){
          if( pExpr->pWin==pWin ){
            assert( pWin->pOwner==pExpr );
            return WRC_Prune;
          }
        }
      }
      /* Fall through.  */

................................................................................
** any SQL window functions, this function is a no-op. Otherwise, it 
** rewrites the SELECT statement so that window function xStep functions
** are invoked in the correct order as described under "SELECT REWRITING"
** at the top of this file.
*/
SQLITE_PRIVATE int sqlite3WindowRewrite(Parse *pParse, Select *p){
  int rc = SQLITE_OK;
  if( p->pWin ){
    Vdbe *v = sqlite3GetVdbe(pParse);
    sqlite3 *db = pParse->db;
    Select *pSub = 0;             /* The subquery */
    SrcList *pSrc = p->pSrc;
    Expr *pWhere = p->pWhere;
    ExprList *pGroupBy = p->pGroupBy;
    Expr *pHaving = p->pHaving;
................................................................................
}

/*
** Attach window object pWin to expression p.
*/
SQLITE_PRIVATE void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
  if( p ){

    /* This routine is only called for the parser.  If pWin was not
    ** allocated due to an OOM, then the parser would fail before ever
    ** invoking this routine */
    if( ALWAYS(pWin) ){
      p->pWin = pWin;

      pWin->pOwner = p;
      if( p->flags & EP_Distinct ){
        sqlite3ErrorMsg(pParse,
           "DISTINCT is not supported for window functions");
      }
    }
  }else{
................................................................................
/*
** Allocate and return a duplicate of the Window object indicated by the
** third argument. Set the Window.pOwner field of the new object to
** pOwner.
*/
SQLITE_PRIVATE Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p){
  Window *pNew = 0;
  if( p ){
    pNew = sqlite3DbMallocZero(db, sizeof(Window));
    if( pNew ){
      pNew->zName = sqlite3DbStrDup(db, p->zName);
      pNew->pFilter = sqlite3ExprDup(db, p->pFilter, 0);
      pNew->pPartition = sqlite3ExprListDup(db, p->pPartition, 0);
      pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, 0);
      pNew->eType = p->eType;
................................................................................
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
/* #include <stdio.h> */

/************ Begin %include sections from the grammar ************************/

/* #include "sqliteInt.h" */

/*
** Disable all error recovery processing in the parser push-down
** automaton.
................................................................................
      p->op = (u8)op;
      p->affinity = 0;
      p->flags = EP_Leaf;
      p->iAgg = -1;
      p->pLeft = p->pRight = 0;
      p->x.pList = 0;
      p->pAggInfo = 0;
      p->pTab = 0;
      p->op2 = 0;
      p->iTable = 0;
      p->iColumn = 0;
#ifndef SQLITE_OMIT_WINDOWFUNC
      p->pWin = 0;
#endif
      p->u.zToken = (char*)&p[1];
      memcpy(p->u.zToken, t.z, t.n);
      p->u.zToken[t.n] = 0;
      if( sqlite3Isquote(p->u.zToken[0]) ){
        if( p->u.zToken[0]=='"' ) p->flags |= EP_DblQuoted;
        sqlite3Dequote(p->u.zToken);
      }
................................................................................
             yyTracePrompt,yyTokenName[yymajor]);
        }
#endif
        yy_destructor(yypParser, (YYCODETYPE)yymajor, &yyminorunion);
        yymajor = YYNOCODE;
      }else{
        while( yypParser->yytos >= yypParser->yystack
            && yymx != YYERRORSYMBOL
            && (yyact = yy_find_reduce_action(
                        yypParser->yytos->stateno,
                        YYERRORSYMBOL)) >= YY_MIN_REDUCE
        ){
          yy_pop_parser_stack(yypParser);
        }
        if( yypParser->yytos < yypParser->yystack || yymajor==0 ){
          yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
          yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
................................................................................
    }
  }
  while( IdChar(z[i]) ){ i++; }
  *tokenType = TK_ID;
  return i;
}




































































/*
** Run the parser on the given SQL string.  The parser structure is
** passed in.  An SQLITE_ status code is returned.  If an error occurs
** then an and attempt is made to write an error message into 
** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that
** error message.
*/
................................................................................
        { SQLITE_DBCONFIG_ENABLE_TRIGGER,        SQLITE_EnableTrigger  },
        { SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, SQLITE_Fts3Tokenizer  },
        { SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, SQLITE_LoadExtension  },
        { SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE,      SQLITE_NoCkptOnClose  },
        { SQLITE_DBCONFIG_ENABLE_QPSG,           SQLITE_EnableQPSG     },
        { SQLITE_DBCONFIG_TRIGGER_EQP,           SQLITE_TriggerEQP     },
        { SQLITE_DBCONFIG_RESET_DATABASE,        SQLITE_ResetDatabase  },

      };
      unsigned int i;
      rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
      for(i=0; i<ArraySize(aFlagOp); i++){
        if( aFlagOp[i].op==op ){
          int onoff = va_arg(ap, int);
          int *pRes = va_arg(ap, int*);
................................................................................
#endif
#if defined(SQLITE_ENABLE_FTS3_TOKENIZER)
                 | SQLITE_Fts3Tokenizer
#endif
#if defined(SQLITE_ENABLE_QPSG)
                 | SQLITE_EnableQPSG
#endif



      ;
  sqlite3HashInit(&db->aCollSeq);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3HashInit(&db->aModule);
#endif

  /* Add the default collation sequence BINARY. BINARY works for both UTF-8
................................................................................
      sqlite3 *db = va_arg(ap, sqlite3*);
      db->dbOptFlags = (u16)(va_arg(ap, int) & 0xffff);
      break;
    }

    /*   sqlite3_test_control(SQLITE_TESTCTRL_LOCALTIME_FAULT, int onoff);
    **
    ** If parameter onoff is non-zero, configure the wrappers so that all
    ** subsequent calls to localtime() and variants fail. If onoff is zero,
    ** undo this setting.
    */
    case SQLITE_TESTCTRL_LOCALTIME_FAULT: {
      sqlite3GlobalConfig.bLocaltimeFault = va_arg(ap, int);
      break;
    }













    /*   sqlite3_test_control(SQLITE_TESTCTRL_NEVER_CORRUPT, int);
    **
    ** Set or clear a flag that indicates that the database file is always well-
    ** formed and never corrupt.  This flag is clear by default, indicating that
    ** database files might have arbitrary corruption.  Setting the flag during
    ** testing causes certain assert() statements in the code to be activated
................................................................................
  UNUSED_PARAMETER(iSavepoint);
  assert( p->inTransaction );
  assert( p->mxSavepoint >= iSavepoint );
  TESTONLY( p->mxSavepoint = iSavepoint );
  sqlite3Fts3PendingTermsClear(p);
  return SQLITE_OK;
}
















static const sqlite3_module fts3Module = {
  /* iVersion      */ 2,
  /* xCreate       */ fts3CreateMethod,
  /* xConnect      */ fts3ConnectMethod,
  /* xBestIndex    */ fts3BestIndexMethod,
  /* xDisconnect   */ fts3DisconnectMethod,
  /* xDestroy      */ fts3DestroyMethod,
  /* xOpen         */ fts3OpenMethod,
  /* xClose        */ fts3CloseMethod,
................................................................................
  /* xCommit       */ fts3CommitMethod,
  /* xRollback     */ fts3RollbackMethod,
  /* xFindFunction */ fts3FindFunctionMethod,
  /* xRename */       fts3RenameMethod,
  /* xSavepoint    */ fts3SavepointMethod,
  /* xRelease      */ fts3ReleaseMethod,
  /* xRollbackTo   */ fts3RollbackToMethod,

};

/*
** This function is registered as the module destructor (called when an
** FTS3 enabled database connection is closed). It frees the memory
** allocated for the tokenizer hash table.
*/
................................................................................
    }
    assert( pToken->pSegcsr==0 );
  }

  return rc;
}


/*
** This function is called on each phrase after the position lists for
** any deferred tokens have been loaded into memory. It updates the phrases
** current position list to include only those positions that are really
** instances of the phrase (after considering deferred tokens). If this
** means that the phrase does not appear in the current row, doclist.pList
** and doclist.nList are both zeroed.
................................................................................
      }
      sqlite3_free(aPoslist);
    }
  }

  return SQLITE_OK;
}


/*
** Maximum number of tokens a phrase may have to be considered for the
** incremental doclists strategy.
*/
#define MAX_INCR_PHRASE_TOKENS 4

................................................................................
     0,                           /* xSync         */
     0,                           /* xCommit       */
     0,                           /* xRollback     */
     0,                           /* xFindFunction */
     0,                           /* xRename       */
     0,                           /* xSavepoint    */
     0,                           /* xRelease      */
     0                            /* xRollbackTo   */

  };
  int rc;                         /* Return code */

  rc = sqlite3_create_module(db, "fts4aux", &fts3aux_module, 0);
  return rc;
}

................................................................................
     0,                           /* xSync         */
     0,                           /* xCommit       */
     0,                           /* xRollback     */
     0,                           /* xFindFunction */
     0,                           /* xRename       */
     0,                           /* xSavepoint    */
     0,                           /* xRelease      */
     0                            /* xRollbackTo   */

  };
  int rc;                         /* Return code */

  rc = sqlite3_create_module(db, "fts3tokenize", &fts3tok_module, (void*)pHash);
  return rc;
}

................................................................................
#define JEACH_VALUE   1
#define JEACH_TYPE    2
#define JEACH_ATOM    3
#define JEACH_ID      4
#define JEACH_PARENT  5
#define JEACH_FULLKEY 6
#define JEACH_PATH    7



#define JEACH_JSON    8
#define JEACH_ROOT    9

  UNUSED_PARAM(pzErr);
  UNUSED_PARAM(argv);
  UNUSED_PARAM(argc);
  UNUSED_PARAM(pAux);
................................................................................
** 1 if the constraint is found, 3 if the constraint and zRoot are found,
** and 0 otherwise.
*/
static int jsonEachBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;
  int jsonIdx = -1;
  int rootIdx = -1;

  const struct sqlite3_index_constraint *pConstraint;




  UNUSED_PARAM(tab);

  pConstraint = pIdxInfo->aConstraint;
  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){






    if( pConstraint->usable==0 ) continue;

    if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    switch( pConstraint->iColumn ){
      case JEACH_JSON:   jsonIdx = i;    break;
      case JEACH_ROOT:   rootIdx = i;    break;
      default:           /* no-op */     break;


    }
  }
  if( jsonIdx<0 ){









    pIdxInfo->idxNum = 0;
    pIdxInfo->estimatedCost = 1e99;
  }else{
    pIdxInfo->estimatedCost = 1.0;

    pIdxInfo->aConstraintUsage[jsonIdx].argvIndex = 1;
    pIdxInfo->aConstraintUsage[jsonIdx].omit = 1;
    if( rootIdx<0 ){

      pIdxInfo->idxNum = 1;
    }else{

      pIdxInfo->aConstraintUsage[rootIdx].argvIndex = 2;
      pIdxInfo->aConstraintUsage[rootIdx].omit = 1;
      pIdxInfo->idxNum = 3;
    }
  }
  return SQLITE_OK;
}

/* Start a search on a new JSON string */
static int jsonEachFilter(
................................................................................
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0                          /* xRollbackTo */

};

/* The methods of the json_tree virtual table. */
static sqlite3_module jsonTreeModule = {
  0,                         /* iVersion */
  0,                         /* xCreate */
  jsonEachConnect,           /* xConnect */
................................................................................
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0                          /* xRollbackTo */

};
#endif /* SQLITE_OMIT_VIRTUALTABLE */

/****************************************************************************
** The following routines are the only publically visible identifiers in this
** file.  Call the following routines in order to register the various SQL
** functions and the virtual table implemented by this file.
................................................................................
    }
    sqlite3_free(zSql);
  }

  return rc;
}

















static sqlite3_module rtreeModule = {
  2,                          /* iVersion */
  rtreeCreate,                /* xCreate - create a table */
  rtreeConnect,               /* xConnect - connect to an existing table */
  rtreeBestIndex,             /* xBestIndex - Determine search strategy */
  rtreeDisconnect,            /* xDisconnect - Disconnect from a table */
  rtreeDestroy,               /* xDestroy - Drop a table */
  rtreeOpen,                  /* xOpen - open a cursor */
  rtreeClose,                 /* xClose - close a cursor */
................................................................................
  rtreeEndTransaction,        /* xCommit - commit transaction */
  rtreeEndTransaction,        /* xRollback - rollback transaction */
  0,                          /* xFindFunction - function overloading */
  rtreeRename,                /* xRename - rename the table */
  rtreeSavepoint,             /* xSavepoint */
  0,                          /* xRelease */
  0,                          /* xRollbackTo */

};

static int rtreeSqlInit(
  Rtree *pRtree, 
  sqlite3 *db, 
  const char *zDb, 
  const char *zPrefix, 
................................................................................
** each segment is "outside" and the area to the left is "inside".
**
** The on-disk representation consists of a 4-byte header followed by
** the values.  The 4-byte header is:
**
**      encoding    (1 byte)   0=big-endian, 1=little-endian
**      nvertex     (3 bytes)  Number of vertexes as a big-endian integer





*/
typedef struct GeoPoly GeoPoly;
struct GeoPoly {
  int nVertex;          /* Number of vertexes */
  unsigned char hdr[4]; /* Header for on-disk representation */
  GeoCoord a[2];    /* 2*nVertex values. X (longitude) first, then Y */
};






/*
** State of a parse of a GeoJSON input.
*/
typedef struct GeoParse GeoParse;
struct GeoParse {
  const unsigned char *z;   /* Unparsed input */
................................................................................
  t = a[1];
  a[1] = a[2];
  a[2] = t;
}

/* Skip whitespace.  Return the next non-whitespace character. */
static char geopolySkipSpace(GeoParse *p){
  while( p->z[0] && safe_isspace(p->z[0]) ) p->z++;
  return p->z[0];
}

/* Parse out a number.  Write the value into *pVal if pVal!=0.
** return non-zero on success and zero if the next token is not a number.
*/
static int geopolyParseNumber(GeoParse *p, GeoCoord *pVal){
................................................................................
  if( c=='-' ){
    j = 1;
    c = z[j];
  }
  if( c=='0' && z[j+1]>='0' && z[j+1]<='9' ) return 0;
  for(;; j++){
    c = z[j];
    if( c>='0' && c<='9' ) continue;
    if( c=='.' ){
      if( z[j-1]=='-' ) return 0;
      if( seenDP ) return 0;
      seenDP = 1;
      continue;
    }
    if( c=='e' || c=='E' ){
................................................................................
      }
      if( c<'0' || c>'9' ) return 0;
      continue;
    }
    break;
  }
  if( z[j-1]<'0' ) return 0;








  if( pVal ) *pVal = (GeoCoord)atof((const char*)p->z);


  p->z += j;
  return 1;
}

/*
** If the input is a well-formed JSON array of coordinates with at least
** four coordinates and where each coordinate is itself a two-value array,
................................................................................
    }
    if( geopolySkipSpace(&s)==']'
     && s.nVertex>=4
     && s.a[0]==s.a[s.nVertex*2-2]
     && s.a[1]==s.a[s.nVertex*2-1]
     && (s.z++, geopolySkipSpace(&s)==0)
    ){
      int nByte;
      GeoPoly *pOut;
      int x = 1;
      s.nVertex--;  /* Remove the redundant vertex at the end */
      nByte = sizeof(GeoPoly) * s.nVertex*2*sizeof(GeoCoord);
      pOut = sqlite3_malloc64( nByte );
      x = 1;
      if( pOut==0 ) goto parse_json_err;
      pOut->nVertex = s.nVertex;
      memcpy(pOut->a, s.a, s.nVertex*2*sizeof(GeoCoord));
      pOut->hdr[0] = *(unsigned char*)&x;
      pOut->hdr[1] = (s.nVertex>>16)&0xff;
      pOut->hdr[2] = (s.nVertex>>8)&0xff;
................................................................................
      p->a[ii*2+1] = y1;
    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }
}






















/*
** Implementation of the geopoly_area(X) function.
**
** If the input is a well-formed Geopoly BLOB then return the area
** enclosed by the polygon.  If the polygon circulates clockwise instead
** of counterclockwise (as it should) then return the negative of the
................................................................................
static void geopolyAreaFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    double rArea = 0.0;

























    int ii;
    for(ii=0; ii<p->nVertex-1; ii++){
      rArea += (p->a[ii*2] - p->a[ii*2+2])           /* (x0 - x1) */
                * (p->a[ii*2+1] + p->a[ii*2+3])      /* (y0 + y1) */
                * 0.5;







    }
    rArea += (p->a[ii*2] - p->a[0])                  /* (xN - x0) */
             * (p->a[ii*2+1] + p->a[1])              /* (yN + y0) */
             * 0.5;

    sqlite3_result_double(context, rArea);

    sqlite3_free(p);
  }            
}



























































/*
** If pPoly is a polygon, compute its bounding box. Then:
**
**    (1) if aCoord!=0 store the bounding box in aCoord, returning NULL
**    (2) otherwise, compute a GeoPoly for the bounding box and return the
**        new GeoPoly
................................................................................
      r = p->a[ii*2+1];
      if( r<mnY ) mnY = (float)r;
      else if( r>mxY ) mxY = (float)r;
    }
    if( pRc ) *pRc = SQLITE_OK;
    if( aCoord==0 ){
      geopolyBboxFill:
      pOut = sqlite3_realloc(p, sizeof(GeoPoly)+sizeof(GeoCoord)*6);
      if( pOut==0 ){
        sqlite3_free(p);
        if( context ) sqlite3_result_error_nomem(context);
        if( pRc ) *pRc = SQLITE_NOMEM;
        return 0;
      }
      pOut->nVertex = 4;
................................................................................
    int jj;
    int nChange = 0;
    sqlite3_bind_int64(pUp, 1, cell.iRowid);
    assert( pRtree->nAux>=1 );
    if( sqlite3_value_nochange(aData[2]) ){
      sqlite3_bind_null(pUp, 2);
    }else{







      sqlite3_bind_value(pUp, 2, aData[2]);


      nChange = 1;
    }
    for(jj=1; jj<pRtree->nAux; jj++){
      nChange++;
      sqlite3_bind_value(pUp, jj+2, aData[jj+2]);
    }
    if( nChange ){
................................................................................
    return SQLITE_INDEX_CONSTRAINT_FUNCTION+1;
  }
  return 0;
}


static sqlite3_module geopolyModule = {
  2,                          /* iVersion */
  geopolyCreate,              /* xCreate - create a table */
  geopolyConnect,             /* xConnect - connect to an existing table */
  geopolyBestIndex,           /* xBestIndex - Determine search strategy */
  rtreeDisconnect,            /* xDisconnect - Disconnect from a table */
  rtreeDestroy,               /* xDestroy - Drop a table */
  rtreeOpen,                  /* xOpen - open a cursor */
  rtreeClose,                 /* xClose - close a cursor */
................................................................................
  rtreeEndTransaction,        /* xCommit - commit transaction */
  rtreeEndTransaction,        /* xRollback - rollback transaction */
  geopolyFindFunction,        /* xFindFunction - function overloading */
  rtreeRename,                /* xRename - rename the table */
  rtreeSavepoint,             /* xSavepoint */
  0,                          /* xRelease */
  0,                          /* xRollbackTo */

};

static int sqlite3_geopoly_init(sqlite3 *db){
  int rc = SQLITE_OK;
  static const struct {
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
    int nArg;

    const char *zName;
  } aFunc[] = {
     { geopolyAreaFunc,          1,    "geopoly_area"             },
     { geopolyBlobFunc,          1,    "geopoly_blob"             },
     { geopolyJsonFunc,          1,    "geopoly_json"             },
     { geopolySvgFunc,          -1,    "geopoly_svg"              },
     { geopolyWithinFunc,        2,    "geopoly_within"           },
     { geopolyContainsPointFunc, 3,    "geopoly_contains_point"   },
     { geopolyOverlapFunc,       2,    "geopoly_overlap"          },
     { geopolyDebugFunc,         1,    "geopoly_debug"            },
     { geopolyBBoxFunc,          1,    "geopoly_bbox"             },
     { geopolyXformFunc,         7,    "geopoly_xform"            },


  };
  static const struct {
    void (*xStep)(sqlite3_context*,int,sqlite3_value**);
    void (*xFinal)(sqlite3_context*);
    const char *zName;
  } aAgg[] = {
     { geopolyBBoxStep, geopolyBBoxFinal, "geopoly_group_bbox"    },
  };
  int i;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){

    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 SQLITE_UTF8, 0,
                                 aFunc[i].xFunc, 0, 0);
  }
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aAgg[i].zName, 1, SQLITE_UTF8, 0,
                                 0, aAgg[i].xStep, aAgg[i].xFinal);
  }
  if( rc==SQLITE_OK ){
................................................................................
** space used by the RBU handle.
*/
struct rbu_vfs {
  sqlite3_vfs base;               /* rbu VFS shim methods */
  sqlite3_vfs *pRealVfs;          /* Underlying VFS */
  sqlite3_mutex *mutex;           /* Mutex to protect pMain */
  sqlite3rbu *pRbu;               /* Owner RBU object */
  rbu_file *pMain;                /* Linked list of main db files */

};

/*
** Each file opened by an rbu VFS is represented by an instance of
** the following structure.
**
** If this is a temporary file (pRbu!=0 && flags&DELETE_ON_CLOSE), variable
................................................................................
  int nShm;                       /* Number of entries in apShm[] array */
  char **apShm;                   /* Array of mmap'd *-shm regions */
  char *zDel;                     /* Delete this when closing file */

  const char *zWal;               /* Wal filename for this main db file */
  rbu_file *pWalFd;               /* Wal file descriptor for this main db */
  rbu_file *pMainNext;            /* Next MAIN_DB file */

};

/*
** True for an RBU vacuum handle, or false otherwise.
*/
#define rbuIsVacuum(p) ((p)->zTarget==0)

................................................................................
  i64 nDiff = nNew - pFd->sz;
  pRbu->szTemp += nDiff;
  pFd->sz = nNew;
  assert( pRbu->szTemp>=0 );
  if( pRbu->szTempLimit && pRbu->szTemp>pRbu->szTempLimit ) return SQLITE_FULL;
  return SQLITE_OK;
}
































































/*
** Close an rbu file.
*/
static int rbuVfsClose(sqlite3_file *pFile){
  rbu_file *p = (rbu_file*)pFile;
  int rc;
................................................................................
    sqlite3_free(p->apShm[i]);
  }
  sqlite3_free(p->apShm);
  p->apShm = 0;
  sqlite3_free(p->zDel);

  if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
    rbu_file **pp;
    sqlite3_mutex_enter(p->pRbuVfs->mutex);
    for(pp=&p->pRbuVfs->pMain; *pp!=p; pp=&((*pp)->pMainNext));
    *pp = p->pMainNext;
    sqlite3_mutex_leave(p->pRbuVfs->mutex);
    rbuUnlockShm(p);
    p->pReal->pMethods->xShmUnmap(p->pReal, 0);
  }
  else if( (p->openFlags & SQLITE_OPEN_DELETEONCLOSE) && p->pRbu ){
    rbuUpdateTempSize(p, 0);
  }


  /* Close the underlying file handle */
  rc = p->pReal->pMethods->xClose(p->pReal);
  return rc;
}


................................................................................
      rc = xControl(p->pReal, SQLITE_FCNTL_ZIPVFS, &dummy);
      if( rc==SQLITE_OK ){
        rc = SQLITE_ERROR;
        pRbu->zErrmsg = sqlite3_mprintf("rbu/zipvfs setup error");
      }else if( rc==SQLITE_NOTFOUND ){
        pRbu->pTargetFd = p;
        p->pRbu = pRbu;



        if( p->pWalFd ) p->pWalFd->pRbu = pRbu;
        rc = SQLITE_OK;
      }
    }
    return rc;
  }
  else if( op==SQLITE_FCNTL_RBUCNT ){
................................................................................
    /* Release the checkpointer and writer locks */
    rbuUnlockShm(p);
    rc = p->pReal->pMethods->xShmUnmap(p->pReal, delFlag);
  }
  return rc;
}

/*
** Given that zWal points to a buffer containing a wal file name passed to 
** either the xOpen() or xAccess() VFS method, return a pointer to the
** file-handle opened by the same database connection on the corresponding
** database file.
*/
static rbu_file *rbuFindMaindb(rbu_vfs *pRbuVfs, const char *zWal){
  rbu_file *pDb;
  sqlite3_mutex_enter(pRbuVfs->mutex);
  for(pDb=pRbuVfs->pMain; pDb && pDb->zWal!=zWal; pDb=pDb->pMainNext){}
  sqlite3_mutex_leave(pRbuVfs->mutex);
  return pDb;
}

/* 
** A main database named zName has just been opened. The following 
** function returns a pointer to a buffer owned by SQLite that contains
** the name of the *-wal file this db connection will use. SQLite
** happens to pass a pointer to this buffer when using xAccess()
** or xOpen() to operate on the *-wal file.  
*/
................................................................................
      ** (pFd->zWal) to point to a buffer owned by SQLite that contains
      ** the name of the *-wal file this db connection will use. SQLite
      ** happens to pass a pointer to this buffer when using xAccess()
      ** or xOpen() to operate on the *-wal file.  */
      pFd->zWal = rbuMainToWal(zName, flags);
    }
    else if( flags & SQLITE_OPEN_WAL ){
      rbu_file *pDb = rbuFindMaindb(pRbuVfs, zName);
      if( pDb ){
        if( pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
          /* This call is to open a *-wal file. Intead, open the *-oal. This
          ** code ensures that the string passed to xOpen() is terminated by a
          ** pair of '\0' bytes in case the VFS attempts to extract a URI 
          ** parameter from it.  */
          const char *zBase = zName;
................................................................................
  }
  if( pFd->pReal->pMethods ){
    /* The xOpen() operation has succeeded. Set the sqlite3_file.pMethods
    ** pointer and, if the file is a main database file, link it into the
    ** mutex protected linked list of all such files.  */
    pFile->pMethods = &rbuvfs_io_methods;
    if( flags & SQLITE_OPEN_MAIN_DB ){
      sqlite3_mutex_enter(pRbuVfs->mutex);
      pFd->pMainNext = pRbuVfs->pMain;
      pRbuVfs->pMain = pFd;
      sqlite3_mutex_leave(pRbuVfs->mutex);
    }
  }else{
    sqlite3_free(pFd->zDel);
  }

  return rc;
}
................................................................................
  **
  **   b) if the *-wal file does not exist, claim that it does anyway,
  **      causing SQLite to call xOpen() to open it. This call will also
  **      be intercepted (see the rbuVfsOpen() function) and the *-oal
  **      file opened instead.
  */
  if( rc==SQLITE_OK && flags==SQLITE_ACCESS_EXISTS ){
    rbu_file *pDb = rbuFindMaindb(pRbuVfs, zPath);
    if( pDb && pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
      if( *pResOut ){
        rc = SQLITE_CANTOPEN;
      }else{
        sqlite3_int64 sz = 0;
        rc = rbuVfsFileSize(&pDb->base, &sz);
        *pResOut = (sz>0);
................................................................................
** operate on a different database schema, so check for it.
**
** idxNum is normally 0, but will be 1 if a schema=? constraint exists.
*/
static int statBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
  int i;

  pIdxInfo->estimatedCost = 1.0e6;  /* Initial cost estimate */

  /* Look for a valid schema=? constraint.  If found, change the idxNum to
  ** 1 and request the value of that constraint be sent to xFilter.  And
  ** lower the cost estimate to encourage the constrained version to be
  ** used.
  */
  for(i=0; i<pIdxInfo->nConstraint; i++){

    if( pIdxInfo->aConstraint[i].usable==0 ) continue;
    if( pIdxInfo->aConstraint[i].op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    if( pIdxInfo->aConstraint[i].iColumn!=10 ) continue;
    pIdxInfo->idxNum = 1;
    pIdxInfo->estimatedCost = 1.0;
    pIdxInfo->aConstraintUsage[i].argvIndex = 1;
    pIdxInfo->aConstraintUsage[i].omit = 1;
    break;
  }

................................................................................
    pCsr->iDb = pTab->iDb;
  }

  *ppCursor = (sqlite3_vtab_cursor *)pCsr;
  return SQLITE_OK;
}

static void statClearPage(StatPage *p){
  int i;
  if( p->aCell ){
    for(i=0; i<p->nCell; i++){
      sqlite3_free(p->aCell[i].aOvfl);
    }
    sqlite3_free(p->aCell);
  }






  sqlite3PagerUnref(p->pPg);
  sqlite3_free(p->zPath);
  memset(p, 0, sizeof(StatPage));
}

static void statResetCsr(StatCursor *pCsr){
  int i;
................................................................................
  int isLeaf;
  int szPage;

  u8 *aData = sqlite3PagerGetData(p->pPg);
  u8 *aHdr = &aData[p->iPgno==1 ? 100 : 0];

  p->flags = aHdr[0];










  p->nCell = get2byte(&aHdr[3]);
  p->nMxPayload = 0;

  isLeaf = (p->flags==0x0A || p->flags==0x0D);
  nHdr = 12 - isLeaf*4 + (p->iPgno==1)*100;


  nUnused = get2byte(&aHdr[5]) - nHdr - 2*p->nCell;
  nUnused += (int)aHdr[7];
  iOff = get2byte(&aHdr[1]);
  while( iOff ){


    nUnused += get2byte(&aData[iOff+2]);
    iOff = get2byte(&aData[iOff]);


  }
  p->nUnused = nUnused;
  p->iRightChildPg = isLeaf ? 0 : sqlite3Get4byte(&aHdr[8]);
  szPage = sqlite3BtreeGetPageSize(pBt);

  if( p->nCell ){
    int i;                        /* Used to iterate through cells */
    int nUsable;                  /* Usable bytes per page */

    sqlite3BtreeEnter(pBt);
    nUsable = szPage - sqlite3BtreeGetReserveNoMutex(pBt);
................................................................................
    if( p->aCell==0 ) return SQLITE_NOMEM_BKPT;
    memset(p->aCell, 0, (p->nCell+1) * sizeof(StatCell));

    for(i=0; i<p->nCell; i++){
      StatCell *pCell = &p->aCell[i];

      iOff = get2byte(&aData[nHdr+i*2]);

      if( !isLeaf ){
        pCell->iChildPg = sqlite3Get4byte(&aData[iOff]);
        iOff += 4;
      }
      if( p->flags==0x05 ){
        /* A table interior node. nPayload==0. */
      }else{
................................................................................
        iOff += getVarint32(&aData[iOff], nPayload);
        if( p->flags==0x0D ){
          u64 dummy;
          iOff += sqlite3GetVarint(&aData[iOff], &dummy);
        }
        if( nPayload>(u32)p->nMxPayload ) p->nMxPayload = nPayload;
        getLocalPayload(nUsable, p->flags, nPayload, &nLocal);

        pCell->nLocal = nLocal;
        assert( nLocal>=0 );
        assert( nPayload>=(u32)nLocal );
        assert( nLocal<=(nUsable-35) );
        if( nPayload>(u32)nLocal ){
          int j;
          int nOvfl = ((nPayload - nLocal) + nUsable-4 - 1) / (nUsable - 4);

          pCell->nLastOvfl = (nPayload-nLocal) - (nOvfl-1) * (nUsable-4);
          pCell->nOvfl = nOvfl;
          pCell->aOvfl = sqlite3_malloc64(sizeof(u32)*nOvfl);
          if( pCell->aOvfl==0 ) return SQLITE_NOMEM_BKPT;
          pCell->aOvfl[0] = sqlite3Get4byte(&aData[iOff+nLocal]);
          for(j=1; j<nOvfl; j++){
            int rc;
................................................................................
          }
        }
      }
    }
  }

  return SQLITE_OK;





}

/*
** Populate the pCsr->iOffset and pCsr->szPage member variables. Based on
** the current value of pCsr->iPageno.
*/
static void statSizeAndOffset(StatCursor *pCsr){
................................................................................
    0,                            /* xCommit */
    0,                            /* xRollback */
    0,                            /* xFindMethod */
    0,                            /* xRename */
    0,                            /* xSavepoint */
    0,                            /* xRelease */
    0,                            /* xRollbackTo */

  };
  return sqlite3_create_module(db, "dbstat", &dbstat_module, 0);
}
#elif defined(SQLITE_ENABLE_DBSTAT_VTAB)
SQLITE_PRIVATE int sqlite3DbstatRegister(sqlite3 *db){ return SQLITE_OK; }
#endif /* SQLITE_ENABLE_DBSTAT_VTAB */

................................................................................
  ** unavailable
  */
  for(i=0; i<pIdxInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pIdxInfo->aConstraint[i];
    if( p->iColumn!=DBPAGE_COLUMN_SCHEMA ) continue;
    if( p->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    if( !p->usable ){
      /* No solution.  Use the default SQLITE_BIG_DBL cost */
      pIdxInfo->estimatedRows = 0x7fffffff;
      return SQLITE_OK;
    }
    iPlan = 2;
    pIdxInfo->aConstraintUsage[i].argvIndex = 1;
    pIdxInfo->aConstraintUsage[i].omit = 1;
    break;
  }

................................................................................
  char *zErr = 0;
  const char *zSchema;
  int iDb;
  Btree *pBt;
  Pager *pPager;
  int szPage;





  if( argc==1 ){
    zErr = "cannot delete";
    goto update_fail;
  }
  pgno = sqlite3_value_int(argv[0]);
  if( (Pgno)sqlite3_value_int(argv[1])!=pgno ){
    zErr = "cannot insert";
................................................................................
    0,                            /* xCommit */
    0,                            /* xRollback */
    0,                            /* xFindMethod */
    0,                            /* xRename */
    0,                            /* xSavepoint */
    0,                            /* xRelease */
    0,                            /* xRollbackTo */

  };
  return sqlite3_create_module(db, "sqlite_dbpage", &dbpage_module, 0);
}
#elif defined(SQLITE_ENABLE_DBPAGE_VTAB)
SQLITE_PRIVATE int sqlite3DbpageRegister(sqlite3 *db){ return SQLITE_OK; }
#endif /* SQLITE_ENABLE_DBSTAT_VTAB */

................................................................................
#ifndef SESSIONS_STRM_CHUNK_SIZE
# ifdef SQLITE_TEST
#   define SESSIONS_STRM_CHUNK_SIZE 64
# else
#   define SESSIONS_STRM_CHUNK_SIZE 1024
# endif
#endif



typedef struct SessionHook SessionHook;
struct SessionHook {
  void *pCtx;
  int (*xOld)(void*,int,sqlite3_value**);
  int (*xNew)(void*,int,sqlite3_value**);
  int (*xCount)(void*);
................................................................................
/*
** Structure for changeset iterators.
*/
struct sqlite3_changeset_iter {
  SessionInput in;                /* Input buffer or stream */
  SessionBuffer tblhdr;           /* Buffer to hold apValue/zTab/abPK/ */
  int bPatchset;                  /* True if this is a patchset */

  int rc;                         /* Iterator error code */
  sqlite3_stmt *pConflict;        /* Points to conflicting row, if any */
  char *zTab;                     /* Current table */
  int nCol;                       /* Number of columns in zTab */
  int op;                         /* Current operation */
  int bIndirect;                  /* True if current change was indirect */
  u8 *abPK;                       /* Primary key array */
................................................................................
** columns and columns that are modified by the UPDATE are set to "undefined".
** PRIMARY KEY fields contain the values identifying the table row to update,
** and fields associated with modified columns contain the new column values.
**
** The records associated with INSERT changes are in the same format as for
** changesets. It is not possible for a record associated with an INSERT
** change to contain a field set to "undefined".




































*/

/*
** For each row modified during a session, there exists a single instance of
** this structure stored in a SessionTable.aChange[] hash table.
*/
struct SessionChange {
................................................................................
**
** If successful, return zero. Otherwise, if an OOM condition is encountered,
** set *pRc to SQLITE_NOMEM and return non-zero.
*/
static int sessionBufferGrow(SessionBuffer *p, int nByte, int *pRc){
  if( *pRc==SQLITE_OK && p->nAlloc-p->nBuf<nByte ){
    u8 *aNew;
    int nNew = p->nAlloc ? p->nAlloc : 128;
    do {
      nNew = nNew*2;
    }while( nNew<(p->nBuf+nByte) );

    aNew = (u8 *)sqlite3_realloc(p->aBuf, nNew);
    if( 0==aNew ){
      *pRc = SQLITE_NOMEM;
    }else{
      p->aBuf = aNew;
      p->nAlloc = nNew;
    }
  }
................................................................................
          }else if( p->op!=SQLITE_INSERT ){
            rc = sessionAppendDelete(&buf, bPatchset, p, nCol, abPK);
          }
          if( rc==SQLITE_OK ){
            rc = sqlite3_reset(pSel);
          }

          /* If the buffer is now larger than SESSIONS_STRM_CHUNK_SIZE, pass
          ** its contents to the xOutput() callback. */
          if( xOutput 
           && rc==SQLITE_OK 
           && buf.nBuf>nNoop 
           && buf.nBuf>SESSIONS_STRM_CHUNK_SIZE 
          ){
            rc = xOutput(pOut, (void*)buf.aBuf, buf.nBuf);
            nNoop = -1;
            buf.nBuf = 0;
          }

        }
................................................................................
** Do the work for either sqlite3changeset_start() or start_strm().
*/
static int sessionChangesetStart(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int nChangeset,                 /* Size of buffer pChangeset in bytes */
  void *pChangeset                /* Pointer to buffer containing changeset */

){
  sqlite3_changeset_iter *pRet;   /* Iterator to return */
  int nByte;                      /* Number of bytes to allocate for iterator */

  assert( xInput==0 || (pChangeset==0 && nChangeset==0) );

  /* Zero the output variable in case an error occurs. */
................................................................................
  if( !pRet ) return SQLITE_NOMEM;
  memset(pRet, 0, sizeof(sqlite3_changeset_iter));
  pRet->in.aData = (u8 *)pChangeset;
  pRet->in.nData = nChangeset;
  pRet->in.xInput = xInput;
  pRet->in.pIn = pIn;
  pRet->in.bEof = (xInput ? 0 : 1);


  /* Populate the output variable and return success. */
  *pp = pRet;
  return SQLITE_OK;
}

/*
................................................................................
** Create an iterator used to iterate through the contents of a changeset.
*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int nChangeset,                 /* Size of buffer pChangeset in bytes */
  void *pChangeset                /* Pointer to buffer containing changeset */
){
  return sessionChangesetStart(pp, 0, 0, nChangeset, pChangeset);









}

/*
** Streaming version of sqlite3changeset_start().
*/
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn
){
  return sessionChangesetStart(pp, xInput, pIn, 0, 0);









}

/*
** If the SessionInput object passed as the only argument is a streaming
** object and the buffer is full, discard some data to free up space.
*/
static void sessionDiscardData(SessionInput *pIn){
  if( pIn->xInput && pIn->iNext>=SESSIONS_STRM_CHUNK_SIZE ){
    int nMove = pIn->buf.nBuf - pIn->iNext;
    assert( nMove>=0 );
    if( nMove>0 ){
      memmove(pIn->buf.aBuf, &pIn->buf.aBuf[pIn->iNext], nMove);
    }
    pIn->buf.nBuf -= pIn->iNext;
    pIn->iNext = 0;
................................................................................
**
** Return an SQLite error code if an error occurs, or SQLITE_OK otherwise.
*/
static int sessionInputBuffer(SessionInput *pIn, int nByte){
  int rc = SQLITE_OK;
  if( pIn->xInput ){
    while( !pIn->bEof && (pIn->iNext+nByte)>=pIn->nData && rc==SQLITE_OK ){
      int nNew = SESSIONS_STRM_CHUNK_SIZE;

      if( pIn->bNoDiscard==0 ) sessionDiscardData(pIn);
      if( SQLITE_OK==sessionBufferGrow(&pIn->buf, nNew, &rc) ){
        rc = pIn->xInput(pIn->pIn, &pIn->buf.aBuf[pIn->buf.nBuf], &nNew);
        if( nNew==0 ){
          pIn->bEof = 1;
        }else{
................................................................................
    if( sessionChangesetReadTblhdr(p) ) return p->rc;
    if( (p->rc = sessionInputBuffer(&p->in, 2)) ) return p->rc;
    p->in.iCurrent = p->in.iNext;
    if( p->in.iNext>=p->in.nData ) return SQLITE_DONE;
    op = p->in.aData[p->in.iNext++];
  }

  if( p->zTab==0 ){
    /* The first record in the changeset is not a table header. Must be a
    ** corrupt changeset. */
    assert( p->in.iNext==1 );
    return (p->rc = SQLITE_CORRUPT_BKPT);
  }

  p->op = op;
  p->bIndirect = p->in.aData[p->in.iNext++];
  if( p->op!=SQLITE_UPDATE && p->op!=SQLITE_DELETE && p->op!=SQLITE_INSERT ){
    return (p->rc = SQLITE_CORRUPT_BKPT);
................................................................................
      nVal = p->nCol;
    }
    p->rc = sessionChangesetBufferRecord(&p->in, nVal, pnRec);
    if( p->rc!=SQLITE_OK ) return p->rc;
    *paRec = &p->in.aData[p->in.iNext];
    p->in.iNext += *pnRec;
  }else{



    /* If this is an UPDATE or DELETE, read the old.* record. */
    if( p->op!=SQLITE_INSERT && (p->bPatchset==0 || p->op==SQLITE_DELETE) ){
      u8 *abPK = p->bPatchset ? p->abPK : 0;
      p->rc = sessionReadRecord(&p->in, p->nCol, abPK, p->apValue);
      if( p->rc!=SQLITE_OK ) return p->rc;
    }

    /* If this is an INSERT or UPDATE, read the new.* record. */
    if( p->op!=SQLITE_DELETE ){
      p->rc = sessionReadRecord(&p->in, p->nCol, 0, &p->apValue[p->nCol]);
      if( p->rc!=SQLITE_OK ) return p->rc;
    }

    if( p->bPatchset && p->op==SQLITE_UPDATE ){
      /* If this is an UPDATE that is part of a patchset, then all PK and
      ** modified fields are present in the new.* record. The old.* record
      ** is currently completely empty. This block shifts the PK fields from
      ** new.* to old.*, to accommodate the code that reads these arrays.  */
      for(i=0; i<p->nCol; i++){
        assert( p->apValue[i]==0 );
        if( p->abPK[i] ){

          p->apValue[i] = p->apValue[i+p->nCol];
          if( p->apValue[i]==0 ) return (p->rc = SQLITE_CORRUPT_BKPT);
          p->apValue[i+p->nCol] = 0;
        }
      }



    }
  }

  return SQLITE_ROW;
}

/*
................................................................................

      default:
        rc = SQLITE_CORRUPT_BKPT;
        goto finished_invert;
    }

    assert( rc==SQLITE_OK );
    if( xOutput && sOut.nBuf>=SESSIONS_STRM_CHUNK_SIZE ){
      rc = xOutput(pOut, sOut.aBuf, sOut.nBuf);
      sOut.nBuf = 0;
      if( rc!=SQLITE_OK ) goto finished_invert;
    }
  }

  assert( rc==SQLITE_OK );
................................................................................
  int nCol;                       /* Size of azCol[] and abPK[] arrays */
  const char **azCol;             /* Array of column names */
  u8 *abPK;                       /* Boolean array - true if column is in PK */
  int bStat1;                     /* True if table is sqlite_stat1 */
  int bDeferConstraints;          /* True to defer constraints */
  SessionBuffer constraints;      /* Deferred constraints are stored here */
  SessionBuffer rebase;           /* Rebase information (if any) here */
  int bRebaseStarted;             /* If table header is already in rebase */

};

/*
** Formulate a statement to DELETE a row from database db. Assuming a table
** structure like this:
**
**     CREATE TABLE x(a, b, c, d, PRIMARY KEY(a, c));
................................................................................
*/
static int sessionRebaseAdd(
  SessionApplyCtx *p,             /* Apply context */
  int eType,                      /* Conflict resolution (OMIT or REPLACE) */
  sqlite3_changeset_iter *pIter   /* Iterator pointing at current change */
){
  int rc = SQLITE_OK;

  int i;
  int eOp = pIter->op;
  if( p->bRebaseStarted==0 ){
    /* Append a table-header to the rebase buffer */
    const char *zTab = pIter->zTab;
    sessionAppendByte(&p->rebase, 'T', &rc);
    sessionAppendVarint(&p->rebase, p->nCol, &rc);
    sessionAppendBlob(&p->rebase, p->abPK, p->nCol, &rc);
    sessionAppendBlob(&p->rebase, (u8*)zTab, (int)strlen(zTab)+1, &rc);
    p->bRebaseStarted = 1;
  }

  assert( eType==SQLITE_CHANGESET_REPLACE||eType==SQLITE_CHANGESET_OMIT );
  assert( eOp==SQLITE_DELETE || eOp==SQLITE_INSERT || eOp==SQLITE_UPDATE );

  sessionAppendByte(&p->rebase, 
      (eOp==SQLITE_DELETE ? SQLITE_DELETE : SQLITE_INSERT), &rc
  );
  sessionAppendByte(&p->rebase, (eType==SQLITE_CHANGESET_REPLACE), &rc);
  for(i=0; i<p->nCol; i++){
    sqlite3_value *pVal = 0;
    if( eOp==SQLITE_DELETE || (eOp==SQLITE_UPDATE && p->abPK[i]) ){
      sqlite3changeset_old(pIter, i, &pVal);
    }else{
      sqlite3changeset_new(pIter, i, &pVal);
    }
    sessionAppendValue(&p->rebase, pVal, &rc);
  }

  return rc;
}

/*
** Invoke the conflict handler for the change that the changeset iterator
** currently points to.
**
................................................................................
  int rc = SQLITE_OK;

  while( pApply->constraints.nBuf ){
    sqlite3_changeset_iter *pIter2 = 0;
    SessionBuffer cons = pApply->constraints;
    memset(&pApply->constraints, 0, sizeof(SessionBuffer));

    rc = sessionChangesetStart(&pIter2, 0, 0, cons.nBuf, cons.aBuf);
    if( rc==SQLITE_OK ){
      int nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
      int rc2;
      pIter2->bPatchset = bPatchset;
      pIter2->zTab = (char*)zTab;
      pIter2->nCol = pApply->nCol;
      pIter2->abPK = pApply->abPK;
................................................................................
  SessionApplyCtx sApply;         /* changeset_apply() context object */
  int bPatchset;

  assert( xConflict!=0 );

  pIter->in.bNoDiscard = 1;
  memset(&sApply, 0, sizeof(sApply));

  sqlite3_mutex_enter(sqlite3_db_mutex(db));
  if( (flags & SQLITE_CHANGESETAPPLY_NOSAVEPOINT)==0 ){
    rc = sqlite3_exec(db, "SAVEPOINT changeset_apply", 0, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_exec(db, "PRAGMA defer_foreign_keys = 1", 0, 0, 0);
  }
................................................................................
      rc = sqlite3_exec(db, "RELEASE changeset_apply", 0, 0, 0);
    }else{
      sqlite3_exec(db, "ROLLBACK TO changeset_apply", 0, 0, 0);
      sqlite3_exec(db, "RELEASE changeset_apply", 0, 0, 0);
    }
  }


  if( rc==SQLITE_OK && bPatchset==0 && ppRebase && pnRebase ){
    *ppRebase = (void*)sApply.rebase.aBuf;
    *pnRebase = sApply.rebase.nBuf;
    sApply.rebase.aBuf = 0;
  }
  sqlite3_finalize(sApply.pInsert);
  sqlite3_finalize(sApply.pDelete);
  sqlite3_finalize(sApply.pUpdate);
................................................................................
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase,
  int flags
){
  sqlite3_changeset_iter *pIter;  /* Iterator to skip through changeset */  
  int rc = sqlite3changeset_start(&pIter, nChangeset, pChangeset);

  if( rc==SQLITE_OK ){
    rc = sessionChangesetApply(
        db, pIter, xFilter, xConflict, pCtx, ppRebase, pnRebase, flags
    );
  }
  return rc;
}
................................................................................
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase,
  int flags
){
  sqlite3_changeset_iter *pIter;  /* Iterator to skip through changeset */  
  int rc = sqlite3changeset_start_strm(&pIter, xInput, pIn);

  if( rc==SQLITE_OK ){
    rc = sessionChangesetApply(
        db, pIter, xFilter, xConflict, pCtx, ppRebase, pnRebase, flags
    );
  }
  return rc;
}
................................................................................
    sessionAppendTableHdr(&buf, pGrp->bPatch, pTab, &rc);
    for(i=0; i<pTab->nChange; i++){
      SessionChange *p;
      for(p=pTab->apChange[i]; p; p=p->pNext){
        sessionAppendByte(&buf, p->op, &rc);
        sessionAppendByte(&buf, p->bIndirect, &rc);
        sessionAppendBlob(&buf, p->aRecord, p->nRecord, &rc);
      }
    }

    if( rc==SQLITE_OK && xOutput && buf.nBuf>=SESSIONS_STRM_CHUNK_SIZE ){
      rc = xOutput(pOut, buf.aBuf, buf.nBuf);
      buf.nBuf = 0;
    }


  }

  if( rc==SQLITE_OK ){
    if( xOutput ){
      if( buf.nBuf>0 ) rc = xOutput(pOut, buf.aBuf, buf.nBuf);
    }else{
      *ppOut = buf.aBuf;
................................................................................
    }

    if( bDone==0 ){
      sessionAppendByte(&sOut, pIter->op, &rc);
      sessionAppendByte(&sOut, pIter->bIndirect, &rc);
      sessionAppendBlob(&sOut, aRec, nRec, &rc);
    }
    if( rc==SQLITE_OK && xOutput && sOut.nBuf>SESSIONS_STRM_CHUNK_SIZE ){
      rc = xOutput(pOut, sOut.aBuf, sOut.nBuf);
      sOut.nBuf = 0;
    }
    if( rc ) break;
  }

  if( rc!=SQLITE_OK ){
................................................................................
*/
SQLITE_API void sqlite3rebaser_delete(sqlite3_rebaser *p){
  if( p ){
    sessionDeleteTable(p->grp.pList);
    sqlite3_free(p);
  }
}






















#endif /* SQLITE_ENABLE_SESSION && SQLITE_ENABLE_PREUPDATE_HOOK */

/************** End of sqlite3session.c **************************************/
/************** Begin file fts5.c ********************************************/


................................................................................
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
/* #include <stdio.h> */

/************ Begin %include sections from the grammar ************************/

/* #include "fts5Int.h" */
/* #include "fts5parse.h" */

/*
** Disable all error recovery processing in the parser push-down
................................................................................
             fts5yyTracePrompt,fts5yyTokenName[fts5yymajor]);
        }
#endif
        fts5yy_destructor(fts5yypParser, (fts5YYCODETYPE)fts5yymajor, &fts5yyminorunion);
        fts5yymajor = fts5YYNOCODE;
      }else{
        while( fts5yypParser->fts5yytos >= fts5yypParser->fts5yystack
            && fts5yymx != fts5YYERRORSYMBOL
            && (fts5yyact = fts5yy_find_reduce_action(
                        fts5yypParser->fts5yytos->stateno,
                        fts5YYERRORSYMBOL)) >= fts5YY_MIN_REDUCE
        ){
          fts5yy_pop_parser_stack(fts5yypParser);
        }
        if( fts5yypParser->fts5yytos < fts5yypParser->fts5yystack || fts5yymajor==0 ){
          fts5yy_destructor(fts5yypParser,(fts5YYCODETYPE)fts5yymajor,&fts5yyminorunion);
          fts5yy_parse_failed(fts5yypParser);
#ifndef fts5YYNOERRORRECOVERY
................................................................................

    if( p->rc ){
      sqlite3Fts5IterClose((Fts5IndexIter*)pRet);
      pRet = 0;
      fts5CloseReader(p);
    }

    *ppIter = &pRet->base;
    sqlite3Fts5BufferFree(&buf);
  }
  return fts5IndexReturn(p);
}

/*
** Return true if the iterator passed as the only argument is at EOF.
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2018-11-05 20:37:38 89e099fbe5e13c33e683bef07361231ca525b88f7907be7092058007b75036f2", -1, SQLITE_TRANSIENT);















}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 2,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
    /* xBestIndex    */ fts5BestIndexMethod,
    /* xDisconnect   */ fts5DisconnectMethod,
    /* xDestroy      */ fts5DestroyMethod,
    /* xOpen         */ fts5OpenMethod,
    /* xClose        */ fts5CloseMethod,
................................................................................
    /* xCommit       */ fts5CommitMethod,
    /* xRollback     */ fts5RollbackMethod,
    /* xFindFunction */ fts5FindFunctionMethod,
    /* xRename       */ fts5RenameMethod,
    /* xSavepoint    */ fts5SavepointMethod,
    /* xRelease      */ fts5ReleaseMethod,
    /* xRollbackTo   */ fts5RollbackToMethod,

  };

  int rc;
  Fts5Global *pGlobal = 0;

  pGlobal = (Fts5Global*)sqlite3_malloc(sizeof(Fts5Global));
  if( pGlobal==0 ){
................................................................................
static int fts5VocabInstanceNext(Fts5VocabCursor *pCsr){
  int eDetail = pCsr->pConfig->eDetail;
  int rc = SQLITE_OK;
  Fts5IndexIter *pIter = pCsr->pIter;
  i64 *pp = &pCsr->iInstPos;
  int *po = &pCsr->iInstOff;
  


  while( eDetail==FTS5_DETAIL_NONE
      || sqlite3Fts5PoslistNext64(pIter->pData, pIter->nData, po, pp) 
  ){
    pCsr->iInstPos = 0;
    pCsr->iInstOff = 0;

    rc = sqlite3Fts5IterNextScan(pCsr->pIter);
    if( rc==SQLITE_OK ){
      rc = fts5VocabInstanceNewTerm(pCsr);
      if( eDetail==FTS5_DETAIL_NONE ) break;
    }
    if( rc ){
      pCsr->bEof = 1;
      break;
    }
  }

................................................................................
    /* xCommit       */ 0,
    /* xRollback     */ 0,
    /* xFindFunction */ 0,
    /* xRename       */ 0,
    /* xSavepoint    */ 0,
    /* xRelease      */ 0,
    /* xRollbackTo   */ 0,

  };
  void *p = (void*)pGlobal;

  return sqlite3_create_module_v2(db, "fts5vocab", &fts5Vocab, p, 0);
}




    
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) */

/************** End of fts5.c ************************************************/
/************** Begin file stmt.c ********************************************/
................................................................................
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */

};

#endif /* SQLITE_OMIT_VIRTUALTABLE */

SQLITE_PRIVATE int sqlite3StmtVtabInit(sqlite3 *db){
  int rc = SQLITE_OK;
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=219194
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2018-11-05 20:37:38 89e099fbe5e13c33e683bef07361231ca525b88f7907be7092058007b750alt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/


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266
267
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269
270
271
...
288
289
290
291
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293
294
295
296
297
298
299
300
301
302
303
304
....
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
....
3052
3053
3054
3055
3056
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3058
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3060
3061
3062
3063
3064
3065
3066
....
3075
3076
3077
3078
3079
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3084
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3087
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3089
3090
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3096
3097
3098
3099
3100
3101
3102
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3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
....
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
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3148
3149
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3151
3152
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3154
3155
3156
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3162
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3166
....
3168
3169
3170
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3172
3173
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3176
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3180
3181
3182
3183
3184
3185
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3187
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3190
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3194
....
3199
3200
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3202
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3206
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3209
3210
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3234
3235
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3239
....
4663
4664
4665
4666
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4671
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....
4833
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4848
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4851
....
4853
4854
4855
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4857
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4860
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4862
4863
4864
4865
4866
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4876
....
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
....
8277
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8279
8280
8281
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8284
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....
9690
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9704
.....
10460
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10471
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10473
10474
.....
10956
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10960
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10987
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10989
10990
10991
10992
10993
10994
10995
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10997
10998
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11001
.....
11642
11643
11644
11645
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11647
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11649
11650
11651
11652
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11655
11656
.....
11660
11661
11662
11663
11664
11665
11666
11667
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11669
11670
11671
11672
11673
11674
11675
11676
11677
11678
11679
11680
11681
.....
12060
12061
12062
12063
12064
12065
12066
12067
12068
12069
12070
12071
12072
12073
12074
12075
12076
12077
12078
12079
.....
12093
12094
12095
12096
12097
12098
12099
12100
12101
12102
12103
12104
12105
12106
12107
12108
12109
12110
12111
12112
12113
12114
12115
12116
12117
12118
12119
12120
12121
12122
12123
12124
12125
12126
12127
12128
12129
12130
12131
12132
12133
12134
12135
12136
12137
12138
12139
12140
12141
12142
12143
12144
12145
.....
15397
15398
15399
15400
15401
15402
15403



15404
15405
15406
15407
15408
15409
15410
15411

15412
15413
15414
15415
15416
15417
15418
15419
15420
15421
.....
15651
15652
15653
15654
15655
15656
15657
15658
15659
15660
15661
15662
15663
15664
15665
15666
15667
15668
.....
16161
16162
16163
16164
16165
16166
16167
16168
16169
16170
16171
16172
16173
16174
16175
16176
16177
16178
16179
16180
16181
16182
.....
16229
16230
16231
16232
16233
16234
16235
16236
16237
16238
16239
16240
16241
16242
16243
.....
16395
16396
16397
16398
16399
16400
16401
16402
16403
16404
16405
16406
16407
16408
16409
16410
16411
16412
16413
16414
16415
16416
16417
16418
16419
.....
16539
16540
16541
16542
16543
16544
16545
16546
16547
16548
16549
16550
16551
16552
16553
16554
16555
.....
16617
16618
16619
16620
16621
16622
16623

16624
16625
16626
16627
16628
16629
16630
16631
16632
16633
16634
16635
16636
16637
.....
16808
16809
16810
16811
16812
16813
16814
16815
16816
16817
16818
16819
16820
16821
16822
16823
16824
.....
16861
16862
16863
16864
16865
16866
16867
16868
16869
16870
16871
16872
16873
16874
16875
.....
17148
17149
17150
17151
17152
17153
17154
17155
17156
17157
17158
17159
17160
17161
17162
17163
17164
17165
17166
17167
.....
17335
17336
17337
17338
17339
17340
17341
17342
17343
17344
17345
17346
17347
17348
17349
17350
17351
17352
17353
.....
17369
17370
17371
17372
17373
17374
17375
17376
17377
17378
17379
17380
17381
17382
17383
.....
18274
18275
18276
18277
18278
18279
18280
18281
18282
18283
18284
18285
18286
18287
18288
.....
18528
18529
18530
18531
18532
18533
18534
18535
18536
18537
18538
18539
18540
18541
18542
.....
18645
18646
18647
18648
18649
18650
18651
18652
18653
18654
18655
18656
18657
18658
18659
.....
18878
18879
18880
18881
18882
18883
18884
18885
18886
18887
18888
18889
18890
18891
18892
18893
18894
18895
18896
18897
18898
18899
18900
.....
18907
18908
18909
18910
18911
18912
18913
18914
18915
18916
18917
18918
18919
18920
18921
18922
18923
.....
19067
19068
19069
19070
19071
19072
19073
19074
19075
19076
19077
19078
19079
19080
19081
.....
19114
19115
19116
19117
19118
19119
19120
19121
19122
19123
19124
19125
19126
19127
19128
19129
19130
.....
19274
19275
19276
19277
19278
19279
19280
19281
19282
19283
19284
19285
19286
19287
19288
19289
19290
.....
19738
19739
19740
19741
19742
19743
19744
19745
19746
19747
19748
19749
19750
19751
19752
.....
20230
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20232
20233
20234
20235
20236
20237
20238
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20240
20241
20242
20243
20244
20245
20246
.....
20295
20296
20297
20298
20299
20300
20301
20302
20303
20304
20305
20306
20307
20308
20309
20310
20311
.....
20336
20337
20338
20339
20340
20341
20342
20343
20344
20345
20346
20347
20348
20349
20350
20351
20352
.....
28465
28466
28467
28468
28469
28470
28471
28472
28473
28474
28475
28476
28477
28478
28479
28480
28481
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28483
28484
28485
28486
28487
28488
28489
28490
28491
28492
28493
28494
28495
28496
28497
28498
28499
28500
28501
28502
28503
28504
28505
28506
28507
28508
28509
28510
28511
28512
28513
28514
.....
28555
28556
28557
28558
28559
28560
28561

28562
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28564

28565
28566
28567
28568
28569
28570
28571
.....
28847
28848
28849
28850
28851
28852
28853
28854
28855
28856
28857
28858
28859
28860
28861
.....
31675
31676
31677
31678
31679
31680
31681
31682
31683
31684
31685
31686
31687
31688
31689
31690
31691
31692
31693
31694
31695
31696
31697
31698
31699
31700
31701
31702
.....
31800
31801
31802
31803
31804
31805
31806
31807
31808
31809
31810
31811
31812
31813
31814
31815
31816
31817
31818
31819
31820
31821
31822
31823
31824
31825
31826
31827
31828
31829
31830
31831
31832
31833
31834
31835
31836
31837
31838
31839
31840
31841
31842
31843
31844
31845
31846
31847
.....
31878
31879
31880
31881
31882
31883
31884
31885
31886
31887
31888
31889
31890
31891
31892
31893
31894
31895
31896
31897
31898
31899
.....
32268
32269
32270
32271
32272
32273
32274
32275

32276
32277
32278

32279
32280
32281
32282
32283
32284
32285
.....
33447
33448
33449
33450
33451
33452
33453
33454

33455
33456
33457
33458
33459
33460
33461
.....
33493
33494
33495
33496
33497
33498
33499
33500
33501
33502
33503
33504
33505
33506
33507
33508
33509
33510
33511
33512
33513
33514
33515
33516
.....
33630
33631
33632
33633
33634
33635
33636
33637
33638
33639
33640
33641
33642
33643
33644
33645
.....
33666
33667
33668
33669
33670
33671
33672
33673

33674
33675
33676
33677
33678
33679
33680
.....
33727
33728
33729
33730
33731
33732
33733
33734
33735
33736
33737
33738
33739
33740
33741
.....
33747
33748
33749
33750
33751
33752
33753
33754
33755
33756
33757
33758
33759
33760
33761
.....
36545
36546
36547
36548
36549
36550
36551
36552
36553
36554
36555
36556
36557
36558
36559
36560
36561
36562
36563
36564
36565
36566
36567
36568
36569
36570
.....
36578
36579
36580
36581
36582
36583
36584
36585
36586
36587
36588
36589
36590
36591
36592
36593
36594
36595
36596
36597
36598
36599
36600
36601
.....
36617
36618
36619
36620
36621
36622
36623
36624
36625
36626
36627
36628
36629
36630
36631
36632
36633
36634
36635
36636
36637
36638
36639
36640
36641
36642
36643
36644
36645
36646
.....
36704
36705
36706
36707
36708
36709
36710
36711
36712
36713
36714
36715
36716
36717
36718
36719
36720
36721
36722
36723
36724
36725
36726
36727
36728
36729
.....
36757
36758
36759
36760
36761
36762
36763
36764
36765
36766
36767
36768
36769
36770
36771
36772
36773
36774
36775
36776
36777
36778
36779
36780
36781
36782
36783
36784
.....
36876
36877
36878
36879
36880
36881
36882
36883
36884
36885
36886
36887
36888
36889
36890
36891
36892
36893
36894
36895
36896
36897
36898
36899
36900
36901
36902
36903
36904
36905
36906
36907
36908
36909
36910
36911
36912
36913
36914
36915
36916
36917
36918
.....
36924
36925
36926
36927
36928
36929
36930
36931
36932
36933
36934
36935
36936
36937
36938
36939
36940
36941
36942
36943
36944
.....
36982
36983
36984
36985
36986
36987
36988
36989
36990
36991
36992
36993
36994
36995
36996
36997
36998
36999
37000
37001
37002
37003
37004
37005
37006
37007
37008
37009
37010
37011
37012
37013
37014
37015
37016
37017
37018
37019
37020
37021
37022
.....
37036
37037
37038
37039
37040
37041
37042
37043
37044
37045
37046
37047
37048
37049
37050
.....
37059
37060
37061
37062
37063
37064
37065
37066
37067
37068
37069
37070
37071
37072
37073
37074
37075
37076
37077
37078
37079
37080
37081
37082
37083
37084
37085
37086
37087
37088
.....
37091
37092
37093
37094
37095
37096
37097
37098
37099
37100
37101
37102
37103
37104
37105
.....
37125
37126
37127
37128
37129
37130
37131
37132
37133
37134
37135
37136
37137
37138
37139
37140
37141
37142
37143
37144
.....
37203
37204
37205
37206
37207
37208
37209
37210
37211
37212
37213
37214
37215
37216
37217
.....
37253
37254
37255
37256
37257
37258
37259
37260
37261
37262
37263
37264
37265
37266
37267
37268
37269
37270
37271
37272
37273
37274
37275
37276
37277
37278
37279
37280
37281
37282
37283
.....
40687
40688
40689
40690
40691
40692
40693
40694

40695
40696
40697
40698
40699
40700
40701
.....
43308
43309
43310
43311
43312
43313
43314
43315
43316
43317
43318
43319
43320
43321
43322
43323
43324
43325
43326
43327
43328
43329
43330
43331
43332
43333
43334
43335
43336
43337
43338
43339
43340
43341
.....
44756
44757
44758
44759
44760
44761
44762
44763
44764
44765
44766
44767
44768
44769
44770
44771
44772
44773
44774
44775
44776

44777
44778
44779
44780
44781
44782
44783
.....
44880
44881
44882
44883
44884
44885
44886

44887
44888
44889
44890
44891
44892
44893
.....
45681
45682
45683
45684
45685
45686
45687

45688
45689
45690
45691
45692
45693
45694
.....
47577
47578
47579
47580
47581
47582
47583
47584
47585
47586
47587
47588
47589
47590
47591
.....
48400
48401
48402
48403
48404
48405
48406
48407
48408
48409
48410
48411
48412
48413
48414
48415
48416
48417
48418
48419
48420
48421
48422
.....
48533
48534
48535
48536
48537
48538
48539
48540
48541
48542
48543
48544
48545
48546
48547
48548
.....
51174
51175
51176
51177
51178
51179
51180
51181
51182

51183
51184
51185
51186
51187
51188
51189

51190
51191
51192
51193
51194
51195
51196

51197
51198
51199
51200
51201
51202
51203
51204
51205
51206
51207
51208
51209
51210
51211
.....
57381
57382
57383
57384
57385
57386
57387
57388
57389
57390
57391
57392
57393
57394
57395
57396
57397
57398
57399
.....
66045
66046
66047
66048
66049
66050
66051
66052
66053
66054
66055
66056
66057
66058
66059
.....
66519
66520
66521
66522
66523
66524
66525
66526
66527
66528
66529
66530
66531
66532
66533
.....
67691
67692
67693
67694
67695
67696
67697



67698
67699
67700
67701
67702
67703
67704
67705
67706
67707
67708
67709
67710
67711
67712
67713
67714
67715
67716
67717
67718


67719
67720
67721
67722
67723
67724
67725
67726
67727
67728
67729
.....
74311
74312
74313
74314
74315
74316
74317
74318
74319
74320
74321
74322
74323
74324
74325
74326
.....
75887
75888
75889
75890
75891
75892
75893
75894
75895
75896
75897
75898
75899
75900
75901
75902
75903
75904
75905
75906
75907
.....
75915
75916
75917
75918
75919
75920
75921
75922
75923
75924
75925
75926
75927
75928
75929
75930
75931
75932
75933
.....
78991
78992
78993
78994
78995
78996
78997
78998
78999
79000
79001
79002
79003
79004
79005
79006
79007
.....
82408
82409
82410
82411
82412
82413
82414
82415
82416
82417
82418
82419
82420
82421
82422
82423
82424
82425
82426
82427
82428
82429
82430
82431
.....
85857
85858
85859
85860
85861
85862
85863



85864
85865
85866
85867
85868
85869
85870
85871
85872
85873
85874
85875
85876
85877
85878
85879
85880
85881
85882
85883
85884
85885
85886
85887
85888
85889
.....
88731
88732
88733
88734
88735
88736
88737
88738
88739
88740
88741
88742
88743
88744
88745
.....
94314
94315
94316
94317
94318
94319
94320
94321
94322
94323
94324
94325
94326
94327
94328
94329
.....
94588
94589
94590
94591
94592
94593
94594
94595
94596
94597
94598
94599
94600
94601
94602
.....
94632
94633
94634
94635
94636
94637
94638

94639
94640
94641
94642
94643
94644
94645
.....
94693
94694
94695
94696
94697
94698
94699
94700
94701
94702
94703
94704
94705
94706
94707
.....
94719
94720
94721
94722
94723
94724
94725
94726
94727
94728
94729
94730
94731
94732
94733
94734
94735
94736
94737
94738
94739
.....
94782
94783
94784
94785
94786
94787
94788
94789
94790
94791
94792
94793
94794
94795
94796
.....
94804
94805
94806
94807
94808
94809
94810
94811
94812
94813
94814
94815
94816
94817
94818
.....
94904
94905
94906
94907
94908
94909
94910
94911
94912
94913
94914
94915
94916
94917
94918
.....
94982
94983
94984
94985
94986
94987
94988
94989
94990
94991
94992
94993
94994
94995
94996
94997
94998
.....
95074
95075
95076
95077
95078
95079
95080
95081
95082
95083
95084
95085
95086
95087
95088
.....
95118
95119
95120
95121
95122
95123
95124


95125
95126
95127
95128
95129
95130
95131
95132
.....
95200
95201
95202
95203
95204
95205
95206
95207
95208
95209
95210
95211
95212
95213
95214
95215
95216
95217
95218
95219
95220
95221
95222
95223
95224
95225
95226
95227
95228
95229
95230
95231
95232
95233
95234
95235
95236
95237
95238
95239
95240
95241
95242
.....
95258
95259
95260
95261
95262
95263
95264
95265
95266
95267
95268
95269
95270
95271
95272
95273
95274
95275
95276
95277
95278
95279
95280
95281
95282
95283
95284
95285
95286
95287
95288
95289
95290
95291
.....
95700
95701
95702
95703
95704
95705
95706
95707
95708
95709
95710
95711
95712
95713
95714
95715
95716
95717
95718
95719
95720
.....
96169
96170
96171
96172
96173
96174
96175
96176
96177
96178
96179
96180
96181
96182
96183
96184
.....
96254
96255
96256
96257
96258
96259
96260
96261
96262
96263
96264
96265
96266
96267
96268
96269
96270
96271
96272
96273
96274
.....
97163
97164
97165
97166
97167
97168
97169
97170
97171
97172
97173
97174
97175
97176
97177
97178
97179
97180
.....
97185
97186
97187
97188
97189
97190
97191
97192
97193
97194
97195
97196
97197
97198
97199
97200
97201
.....
97251
97252
97253
97254
97255
97256
97257
97258
97259
97260
97261
97262
97263
97264
97265
.....
97278
97279
97280
97281
97282
97283
97284
97285
97286
97287
97288
97289
97290
97291
97292
.....
97381
97382
97383
97384
97385
97386
97387
97388
97389

97390
97391
97392
97393
97394
97395

97396
97397


97398
97399
97400
97401
97402
97403
97404
97405
97406
97407
97408
97409
97410
97411
97412
97413
97414
97415
97416



97417
97418
97419
97420
97421
97422
97423
.....
98204
98205
98206
98207
98208
98209
98210
98211
98212
98213
98214
98215
98216
98217
98218
98219
.....
98260
98261
98262
98263
98264
98265
98266
98267
98268
98269
98270
98271
98272
98273
98274
98275
98276
98277
98278
98279
98280
98281
.....
99501
99502
99503
99504
99505
99506
99507
99508
99509
99510
99511
99512
99513
99514
99515
.....
99525
99526
99527
99528
99529
99530
99531
99532
99533
99534
99535
99536
99537
99538
99539
.....
99739
99740
99741
99742
99743
99744
99745
99746
99747
99748
99749
99750
99751
99752
99753
99754
.....
99983
99984
99985
99986
99987
99988
99989
99990
99991
99992
99993
99994
99995
99996
99997
99998
99999
100000
100001
100002
100003
100004
100005
100006
100007
100008
......
100845
100846
100847
100848
100849
100850
100851
100852
100853
100854
100855
100856
100857
100858
100859
100860
100861
100862
100863
100864
100865
100866
100867
100868
100869
100870
100871
100872
......
100878
100879
100880
100881
100882
100883
100884















100885
100886
100887
100888
100889
100890
100891
......
101018
101019
101020
101021
101022
101023
101024
101025
101026
101027
101028
101029
101030
101031
101032
101033
......
101250
101251
101252
101253
101254
101255
101256
101257
101258
101259
101260
101261
101262
101263
101264
......
102133
102134
102135
102136
102137
102138
102139
102140
102141
102142
102143
102144
102145
102146
102147
102148
102149
102150
102151
102152
102153
102154
102155
102156
......
102275
102276
102277
102278
102279
102280
102281
102282
102283
102284
102285
102286
102287
102288
102289
......
102533
102534
102535
102536
102537
102538
102539
102540
102541
102542
102543
102544
102545
102546
102547
102548
102549
102550
102551
102552
102553
102554
......
102654
102655
102656
102657
102658
102659
102660
102661
102662







102663
102664
102665
102666
102667
102668
102669
......
102811
102812
102813
102814
102815
102816
102817
102818
102819
102820
102821
102822
102823
102824
102825
102826
......
102909
102910
102911
102912
102913
102914
102915
102916
102917
102918
102919
102920
102921
102922
102923
......
103063
103064
103065
103066
103067
103068
103069
103070
103071
103072
103073
103074
103075
103076
103077
103078
103079
......
105114
105115
105116
105117
105118
105119
105120
105121
105122
105123
105124
105125
105126
105127
105128
......
105794
105795
105796
105797
105798
105799
105800
105801
105802
105803
105804
105805
105806
105807
105808
......
105851
105852
105853
105854
105855
105856
105857
105858
105859
105860
105861
105862
105863
105864
105865
......
106275
106276
106277
106278
106279
106280
106281

106282
106283
106284
106285
106286
106287
106288
106289
106290

106291
106292
106293
106294
106295
106296
106297
......
106463
106464
106465
106466
106467
106468
106469

106470
106471
106472
106473
106474
106475
106476
106477
106478
106479
106480
106481
106482
106483
106484
106485
106486
106487
106488
106489
106490
106491
106492
......
106555
106556
106557
106558
106559
106560
106561
106562
106563
106564
106565
106566
106567
106568
106569
106570
106571
106572
106573
106574
......
106718
106719
106720
106721
106722
106723
106724
106725
106726
106727
106728
106729
106730
106731
106732
106733
106734
106735
106736
106737
106738
106739
106740
106741
106742
106743
106744
106745
106746
106747
106748
106749
106750
106751
106752
106753
106754
106755
106756
......
107818
107819
107820
107821
107822
107823
107824
107825
107826
107827
107828
107829
107830
107831
107832
107833
107834
107835
107836
107837
107838
107839
107840
107841
107842
107843
107844
107845
107846
107847
107848
107849
107850
107851
107852
107853
107854
107855
107856
107857
107858
107859
107860
107861
......
107886
107887
107888
107889
107890
107891
107892
107893
107894
107895
107896
107897
107898
107899
107900
107901
107902
107903
......
108398
108399
108400
108401
108402
108403
108404
108405
108406
108407
108408
108409
108410
108411
108412
......
110853
110854
110855
110856
110857
110858
110859
110860
110861
110862
110863
110864
110865
110866
110867
110868
110869
110870
110871
110872
110873
110874
110875
110876
110877
110878
110879
110880
110881
110882
110883
110884
110885
110886
110887
110888
110889
110890
110891
110892
110893
110894
110895
......
110960
110961
110962
110963
110964
110965
110966
110967
110968
110969
110970
110971
110972
110973
110974
......
111107
111108
111109
111110
111111
111112
111113
111114
111115
111116
111117
111118
111119
111120
111121
111122
111123
111124
111125
111126
111127
111128
111129
111130
111131
111132
111133
111134
111135
111136
111137
111138
111139
111140
111141
111142
111143
111144
111145
111146
111147
111148
111149
111150
111151
111152
111153
111154















111155
111156
111157

111158
111159
111160
111161
111162
111163
111164
......
114554
114555
114556
114557
114558
114559
114560
114561
114562
114563
114564
114565
114566
114567
114568
......
115630
115631
115632
115633
115634
115635
115636
115637
115638
115639
115640
115641
115642
115643
115644
115645
......
116611
116612
116613
116614
116615
116616
116617
116618
116619
116620
116621
116622
116623
116624
116625
116626
116627
116628
116629
116630
116631
116632
116633
......
116641
116642
116643
116644
116645
116646
116647
116648
116649
116650
116651
116652
116653
116654
116655
116656
116657

116658
116659
116660
116661
116662
116663
116664
116665
116666
116667
116668
116669
......
116670
116671
116672
116673
116674
116675
116676
116677
116678
116679
116680
116681
116682
116683
116684
......
116876
116877
116878
116879
116880
116881
116882
116883
116884
116885
116886
116887
116888
116889
116890
116891
116892
116893
116894
116895
116896
......
118383
118384
118385
118386
118387
118388
118389
118390
118391
118392
118393
118394
118395
118396
118397
118398
118399
118400
118401
118402
118403
118404
118405
......
118679
118680
118681
118682
118683
118684
118685
118686
118687
118688
118689
118690
118691
118692
118693
118694
......
118769
118770
118771
118772
118773
118774
118775
118776
118777
118778
118779
118780
118781
118782
118783
......
119137
119138
119139
119140
119141
119142
119143
119144
119145
119146
119147
119148
119149
119150
119151
119152
119153
119154
119155
119156
119157
......
119593
119594
119595
119596
119597
119598
119599

119600
119601
119602
119603
119604
119605
119606
119607
119608
119609
......
119612
119613
119614
119615
119616
119617
119618
119619
119620
119621
119622
119623
119624
119625
119626
119627
119628
119629
119630
119631
119632
119633
119634
119635
119636
119637
119638
119639
119640
119641
119642
119643
119644
119645
119646
119647
119648
119649
119650
119651
119652
119653
119654
119655
119656
119657
119658

119659
119660
119661

119662
119663
119664
119665
119666


119667
119668
119669


119670
119671
119672
119673
119674
119675
119676
119677
119678
119679
119680
119681
119682
119683
119684
119685
119686
......
119708
119709
119710
119711
119712
119713
119714
119715
119716
119717
119718
119719
119720
119721
119722
......
119745
119746
119747
119748
119749
119750
119751
119752
119753
119754
119755
119756
119757
119758
119759
......
119780
119781
119782
119783
119784
119785
119786
119787
119788
119789
119790
119791
119792
119793
119794
119795
119796
119797
119798
119799
119800
119801
......
119817
119818
119819
119820
119821
119822
119823
119824
119825
119826
119827
119828
119829
119830
119831
119832
119833
119834
119835
119836
119837
119838
......
119860
119861
119862
119863
119864
119865
119866
119867
119868
119869
119870
119871
119872
119873
119874
119875
119876
119877
119878
119879
119880
119881
119882
119883
119884
119885
119886
119887
119888
......
119896
119897
119898
119899
119900
119901
119902
119903
119904
119905
119906
119907
119908
119909
119910
119911
119912
119913
119914
119915
......
119958
119959
119960
119961
119962
119963
119964
119965
119966
119967
119968
119969
119970
119971
119972
......
119984
119985
119986
119987
119988
119989
119990
119991
119992
119993
119994
119995
119996
119997
119998
......
120017
120018
120019
120020
120021
120022
120023
120024
120025
120026
120027
120028
120029
120030
120031
......
120048
120049
120050
120051
120052
120053
120054
120055
120056
120057
120058
120059
120060
120061
120062
120063
120064
120065
......
120104
120105
120106
120107
120108
120109
120110
120111
120112
120113
120114
120115
120116
120117
120118
120119
120120
120121
120122
120123
120124
120125
120126
120127
120128
120129
120130
120131
120132
120133
120134
120135
120136
120137
120138
120139
120140
120141
120142
120143
120144
120145
120146
120147
120148
120149
120150
120151
120152
120153
120154
120155
120156
120157
120158
120159
120160
120161
120162
......
120200
120201
120202
120203
120204
120205
120206
120207
120208
120209
120210
120211
120212
120213
120214
120215
120216
120217
120218
120219
120220
120221
120222
120223
120224
120225
......
121223
121224
121225
121226
121227
121228
121229
121230
121231
121232
121233
121234
121235
121236
121237
......
121272
121273
121274
121275
121276
121277
121278
121279
121280
121281
121282
121283
121284
121285
121286
121287
121288
121289
121290
121291
121292
121293
121294
121295
121296
121297
121298
121299
121300
121301
121302
121303
121304
121305
121306
121307
121308
121309
121310
121311
121312
121313
121314
121315
......
121339
121340
121341
121342
121343
121344
121345
121346
121347
121348
121349
121350
121351
121352
121353
121354
121355
121356
121357
121358
121359
121360
121361
121362
121363
121364
121365
121366
......
121376
121377
121378
121379
121380
121381
121382
121383
121384
121385
121386
121387
121388
121389
121390
121391
121392
......
121425
121426
121427
121428
121429
121430
121431
121432
121433
121434
121435
121436
121437
121438
121439
......
121467
121468
121469
121470
121471
121472
121473
121474
121475
121476
121477
121478
121479
121480
121481
121482
121483
121484
......
121515
121516
121517
121518
121519
121520
121521

121522
121523
121524
121525
121526
121527
121528
121529
121530
121531
121532
121533
121534
121535
121536
121537
121538
121539
121540
121541
121542
121543
121544
121545
121546
121547
121548
121549
121550
121551
121552
121553
121554
121555
121556
......
122311
122312
122313
122314
122315
122316
122317
122318
122319
122320
122321
122322
122323
122324
122325
122326
122327
122328
122329
122330
122331

122332
122333
122334


122335
122336
122337
122338
122339
122340
122341
122342
122343
122344
122345
122346
122347
122348
122349
122350
122351
122352
122353
122354
......
122670
122671
122672
122673
122674
122675
122676
122677
122678
122679
122680
122681
122682
122683
122684
122685
......
123024
123025
123026
123027
123028
123029
123030
123031
123032
123033
123034
123035
123036
123037
123038
123039
......
123406
123407
123408
123409
123410
123411
123412
123413
123414
123415
123416
123417
123418
123419
123420
123421
123422
123423
123424
123425
123426
123427
123428
123429
123430
123431
123432
123433
123434
123435
123436
123437
123438
123439
123440
123441
123442
123443
123444
123445
123446
123447
123448
123449
123450
123451
123452
123453
123454
123455
123456
123457
123458
123459
123460
123461
123462
123463
123464
123465
123466
123467
123468
123469
123470
123471
123472
123473
123474
123475
123476
123477
123478
123479
123480
123481
123482
123483
123484
123485
123486
123487
123488
123489
123490
123491
123492
123493
123494
123495
123496
123497
123498
123499
123500
123501
123502
123503
123504
123505
123506
123507
123508
123509
123510
123511
123512
123513
123514
123515
123516
123517
123518
123519
123520
123521
123522
123523
123524
123525
123526
123527
123528
123529
123530
123531
123532
123533
123534
123535
123536
123537
123538
123539
123540
123541
123542
123543
123544
123545
123546
123547
123548
123549
123550
123551
123552
123553
123554
123555
123556
123557
123558
123559
123560
123561
123562
123563
123564
123565
123566
123567
123568
123569
123570
123571
123572
123573
123574
123575
123576
123577
123578
123579
123580
123581
123582
123583
123584
123585
123586
123587
123588
123589
123590
123591
123592
123593
123594
123595
123596
123597
123598
123599
123600
123601
123602
123603
123604
123605
123606
123607
123608
123609
123610
123611
123612
123613
123614
123615
123616
123617
123618
123619
123620
123621
123622
123623
123624
123625
123626
123627
123628
123629
123630
123631
123632
123633
123634
123635
123636
123637
123638
123639
123640
123641
123642
123643
123644
123645
123646
123647
123648
123649
123650
123651
123652
123653
123654
123655
123656
123657
123658
123659
123660
123661
123662
123663
123664
123665
123666
123667
123668
123669
123670
123671
123672
123673
123674
123675
123676
123677
123678
123679
123680
123681
123682
123683
123684
123685
123686
123687
123688
123689
123690
123691
123692
123693
123694
123695
123696
123697
123698
123699
123700
123701
123702
123703
123704
123705
123706
123707
......
124706
124707
124708
124709
124710
124711
124712
124713
124714
124715
124716
124717
124718
124719
124720
......
124729
124730
124731
124732
124733
124734
124735
124736
124737
124738
124739
124740
124741
124742
124743
124744
124745
124746
124747
124748
......
125583
125584
125585
125586
125587
125588
125589
125590
125591
125592
125593
125594
125595
125596
125597
......
125768
125769
125770
125771
125772
125773
125774
125775
125776
125777
125778
125779
125780
125781
125782
125783
125784
125785
125786
125787
125788
125789
125790
......
125867
125868
125869
125870
125871
125872
125873
125874
125875
125876
125877
125878
125879
125880
125881
......
131991
131992
131993
131994
131995
131996
131997
131998
131999
132000
132001
132002
132003
132004
132005
132006
132007
132008
132009
132010
132011
132012
132013
132014
132015
132016
132017
132018
132019
132020
132021
132022
132023
132024
132025
132026
132027
132028
132029
132030
132031
132032
132033
132034
132035
132036
132037
132038
132039
132040
132041
132042
132043
132044
132045
132046
132047
132048
132049
132050
132051
132052
132053
132054
132055
......
132266
132267
132268
132269
132270
132271
132272


132273
132274
132275
132276
132277
132278
132279
132280
132281
132282
132283
132284

132285
132286
132287
132288
132289
132290
132291
......
133327
133328
133329
133330
133331
133332
133333
133334
133335
133336
133337
133338
133339
133340
133341
133342
......
133870
133871
133872
133873
133874
133875
133876

133877
133878
133879
133880
133881
133882
133883
133884
133885


133886
133887
133888
133889
133890
133891
133892
......
133898
133899
133900
133901
133902
133903
133904
133905
133906
133907
133908
133909
133910
133911
133912
133913
......
134594
134595
134596
134597
134598
134599
134600
134601
134602
134603
134604
134605
134606
134607
134608
......
135214
135215
135216
135217
135218
135219
135220
135221
135222
135223
135224
135225
135226
135227
135228
135229
135230
135231
135232
135233
135234
135235
135236
135237
135238
135239
135240
135241
135242
135243
135244
135245
135246
135247
135248
135249
135250
135251
135252
135253
......
136494
136495
136496
136497
136498
136499
136500
136501
136502
136503
136504
136505
136506
136507
136508
......
137894
137895
137896
137897
137898
137899
137900
137901
137902
137903
137904
137905
137906
137907
137908
......
137995
137996
137997
137998
137999
138000
138001
138002
138003
138004
138005
138006
138007
138008
138009
......
138017
138018
138019
138020
138021
138022
138023
138024
138025
138026
138027
138028
138029
138030
138031
138032
138033
138034
138035
138036
......
138040
138041
138042
138043
138044
138045
138046
138047
138048
138049
138050
138051
138052
138053
138054
138055
138056
138057
......
139187
139188
139189
139190
139191
139192
139193
139194
139195
139196
139197
139198
139199
139200
139201
139202
139203
139204
139205
139206
139207
139208
139209
139210
139211
139212
139213
139214
139215
......
140064
140065
140066
140067
140068
140069
140070

140071
140072
140073
140074
140075
140076
140077
......
140241
140242
140243
140244
140245
140246
140247
140248
140249
140250
140251
140252
140253
140254
140255
140256
140257
140258
140259
140260
140261
140262
140263
140264
140265
140266
140267
140268
140269
140270
140271
140272
140273
140274
140275
140276












140277
140278
140279
140280
140281
140282
140283
140284
......
141324
141325
141326
141327
141328
141329
141330
141331
141332
141333
141334
141335
141336
141337
141338
141339
141340
141341
141342
141343
141344
141345
......
142343
142344
142345
142346
142347
142348
142349
142350
142351
142352
142353
142354
142355
142356
142357
142358
142359
142360
142361
142362
142363
142364
142365
142366
142367
......
142749
142750
142751
142752
142753
142754
142755
142756
142757
142758
142759
142760
142761
142762
142763
142764
142765
142766
142767
......
142779
142780
142781
142782
142783
142784
142785
142786
142787
142788
142789
142790
142791
142792
142793
142794
142795
142796
142797
142798
142799
142800
142801
......
145169
145170
145171
145172
145173
145174
145175
145176
145177
145178
145179
145180
145181
145182
145183
145184
145185
145186
145187
145188
......
145291
145292
145293
145294
145295
145296
145297
145298
145299
145300
145301
145302
145303
145304
145305
......
145504
145505
145506
145507
145508
145509
145510
145511
145512
145513
145514
145515
145516
145517
145518
145519
145520
145521
145522
145523
145524
......
146673
146674
146675
146676
146677
146678
146679
146680
146681
146682
146683
146684
146685
146686
146687
......
146825
146826
146827
146828
146829
146830
146831
146832
146833
146834
146835
146836
146837
146838
146839
......
146927
146928
146929
146930
146931
146932
146933
146934
146935
146936
146937



146938
146939
146940
146941
146942
146943
146944
......
151122
151123
151124
151125
151126
151127
151128

151129
151130
151131
151132
151133
151134
151135
151136
151137
151138
......
152091
152092
152093
152094
152095
152096
152097
152098
152099
152100
152101
152102
152103
152104
152105
152106
152107
152108
152109
152110
152111
152112
152113
152114
152115
152116
152117
152118
152119
152120
152121
152122
152123
152124
152125
152126
152127
152128
152129
152130
152131
152132
152133
152134
152135
152136
152137
152138
152139
152140
152141
152142
152143
152144
152145
152146
152147
152148
152149
152150
152151
152152
152153
152154
152155
152156
152157
152158
152159
152160
152161
152162
152163
152164
152165
152166
152167
152168
152169
152170
152171
......
153555
153556
153557
153558
153559
153560
153561
153562
153563
153564
153565
153566
153567
153568
153569
......
155783
155784
155785
155786
155787
155788
155789
155790
155791
155792
155793
155794
155795
155796
155797
155798
155799
......
156673
156674
156675
156676
156677
156678
156679
156680
156681

156682
156683
156684
156685
156686
156687
156688
156689
156690
156691
156692
156693
156694
156695
156696
156697
156698
156699
156700
156701
156702
156703
156704
156705
......
162159
162160
162161
162162
162163
162164
162165
162166
162167
162168
162169
162170
162171
162172
162173
162174
162175
162176
162177
162178
162179
162180
162181
162182
162183
162184
162185
162186
162187
162188
162189
162190
......
162199
162200
162201
162202
162203
162204
162205
162206
162207
162208
162209
162210
162211
162212
162213
......
162480
162481
162482
162483
162484
162485
162486
162487
162488
162489
162490
162491
162492
162493
162494
......
162584
162585
162586
162587
162588
162589
162590
162591
162592
162593
162594
162595
162596
162597
162598
......
164833
164834
164835
164836
164837
164838
164839
164840
164841
164842
164843
164844
164845
164846
164847
164848
......
168393
168394
168395
168396
168397
168398
168399
168400
168401
168402
168403
168404
168405
168406
168407
168408
......
178571
178572
178573
178574
178575
178576
178577
178578
178579
178580
178581
178582
178583
178584
178585
178586
178587
......
178831
178832
178833
178834
178835
178836
178837
178838
178839
178840
178841
178842
178843
178844
178845
178846
178847
178848
178849
178850
178851
178852
178853
178854
178855
178856
178857
178858
178859




178860
178861
178862
178863

178864
178865
178866
178867
178868
178869
178870
178871
178872
178873

178874
178875
178876
178877
178878

178879
178880
178881
178882
178883
178884
178885
178886
178887
178888
178889
178890
178891
178892
......
178987
178988
178989
178990
178991
178992
178993
178994
178995
178996
178997
178998
178999
179000
179001
179002
......
179015
179016
179017
179018
179019
179020
179021
179022
179023
179024
179025
179026
179027
179028
179029
179030
......
182446
182447
182448
182449
182450
182451
182452
182453
182454
182455
182456
182457
182458
182459
182460
182461
182462
182463
182464
182465
182466
182467
182468
182469
182470
182471
182472
182473
182474
182475
182476
182477
......
182486
182487
182488
182489
182490
182491
182492
182493
182494
182495
182496
182497
182498
182499
182500
......
183477
183478
183479
183480
183481
183482
183483
183484
183485
183486
183487
183488
183489
183490
183491
183492
183493
183494
183495
183496
183497
183498
183499
183500
183501
183502
183503
183504
183505
183506
183507
......
183519
183520
183521
183522
183523
183524
183525
183526
183527
183528
183529
183530
183531
183532
183533
......
183539
183540
183541
183542
183543
183544
183545
183546
183547
183548
183549
183550
183551
183552
183553
......
183561
183562
183563
183564
183565
183566
183567
183568
183569
183570
183571
183572
183573
183574
183575
183576
183577
183578
183579
183580
183581
183582
183583
183584
183585
......
183629
183630
183631
183632
183633
183634
183635

183636
183637
183638

183639
183640
183641
183642
183643
183644
183645
183646
......
183834
183835
183836
183837
183838
183839
183840
183841
183842
183843
183844
183845
183846
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183857
183858
183859
183860
183861
183862
183863
183864
183865
183866
183867
183868
......
183871
183872
183873
183874
183875
183876
183877
183878
183879
183880
183881
183882
183883
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183892
183893
183894
183895
183896
183897
183898
183899
183900
183901
183902
183903
183904




183905
183906
183907
183908
183909
183910
183911
183912



183913
183914
183915
183916
183917
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183925
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183972
183973
183974
183975
183976
183977
183978
183979
183980
183981
183982
183983
......
184015
184016
184017
184018
184019
184020
184021
184022
184023
184024
184025
184026
184027
184028
184029
......
185043
185044
185045
185046
185047
185048
185049
185050
185051
185052
185053
185054
185055
185056
185057
185058
185059
185060
185061
185062
185063
185064
185065
185066
......
185096
185097
185098
185099
185100
185101
185102
185103
185104
185105
185106
185107
185108
185109
185110
......
185119
185120
185121
185122
185123
185124
185125
185126
185127
185128
185129
185130
185131
185132
185133
185134
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185144
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185154
185155
185156
185157
185158
185159
185160
185161
185162
185163
185164
185165
185166
185167
185168
......
187181
187182
187183
187184
187185
187186
187187
187188
187189
187190
187191
187192
187193
187194
187195
187196
......
187211
187212
187213
187214
187215
187216
187217
187218
187219
187220
187221
187222
187223
187224
187225
......
190807
190808
190809
190810
190811
190812
190813
190814
190815
190816
190817
190818
190819
190820
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190841
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190844
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190850
190851
190852
190853
190854
190855
190856
190857
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190859
190860
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190862
190863
190864
190865
190866
190867
190868
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190870
190871
190872
190873
190874
190875
190876
190877
190878
190879
190880
190881
190882
190883
......
190888
190889
190890
190891
190892
190893
190894
190895




190896
190897
190898
190899
190900
190901
190902
190903
190904
190905
190906
190907
190908
190909
......
191154
191155
191156
191157
191158
191159
191160
191161
191162
191163
191164
191165
191166
191167
191168
191169
191170
......
191318
191319
191320
191321
191322
191323
191324














191325
191326
191327
191328
191329
191330
191331
......
191396
191397
191398
191399
191400
191401
191402
191403
191404
191405
191406
191407
191408
191409
191410
......
191448
191449
191450
191451
191452
191453
191454
191455



191456
191457
191458
191459
191460
191461
191462
......
191496
191497
191498
191499
191500
191501
191502
191503
191504
191505
191506
191507
191508
191509
191510
......
191909
191910
191911
191912
191913
191914
191915


191916
191917
191918
191919
191920
191921
191922
191923
191924

191925
191926
191927
191928
191929
191930
191931
......
191967
191968
191969
191970
191971
191972
191973
191974
191975
191976
191977
191978
191979
191980
191981
191982
191983
191984
191985
191986
191987
191988
191989
191990
191991
191992
191993
191994
......
192043
192044
192045
192046
192047
192048
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192050
192051
192052
192053
192054
192055
192056
192057
192058
192059
192060
192061



192062
192063
192064
192065
192066
192067
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192069
192070
192071
192072
192073
192074
192075
192076

192077
192078
192079
192080
192081
192082
192083
......
192086
192087
192088
192089
192090
192091
192092
192093
192094
192095
192096
192097
192098
192099
192100
......
192103
192104
192105
192106
192107
192108
192109
192110
192111

192112
192113
192114
192115
192116
192117
192118
192119
192120
192121
192122
192123
192124
......
192134
192135
192136
192137
192138
192139
192140
192141
192142
192143
192144
192145
192146
192147
192148
192149
192150
192151
192152
......
192434
192435
192436
192437
192438
192439
192440
192441
192442
192443
192444
192445
192446
192447
192448
......
192565
192566
192567
192568
192569
192570
192571
192572

192573
192574
192575
192576
192577
192578
192579
192580
......
192758
192759
192760
192761
192762
192763
192764
192765
192766
192767
192768
192769
192770
192771
192772
192773
192774
192775
......
192852
192853
192854
192855
192856
192857
192858
192859
192860
192861
192862
192863
192864
192865
192866
......
192888
192889
192890
192891
192892
192893
192894
192895
192896
192897
192898
192899
192900
192901
192902
192903
......
192953
192954
192955
192956
192957
192958
192959
192960
192961
192962
192963
192964
192965
192966
192967
......
193110
193111
193112
193113
193114
193115
193116
193117
193118
193119
193120
193121
193122
193123
193124
193125
193126
193127
193128
193129
193130
193131
193132
193133
193134
193135
193136
193137
193138
193139
193140
193141
193142
193143
193144
193145
193146
193147
193148
193149
193150
193151
193152
193153
193154
193155
193156
193157
193158
193159
......
194696
194697
194698
194699
194700
194701
194702
194703
194704
194705
194706
194707
194708
194709
194710
194711
194712
194713
194714
194715
......
195299
195300
195301
195302
195303
195304
195305
195306
195307
195308
195309
195310
195311
195312
195313
195314
195315
195316
195317
195318
......
195443
195444
195445
195446
195447
195448
195449
195450
195451
195452
195453
195454
195455
195456
195457
195458
......
195464
195465
195466
195467
195468
195469
195470
195471
195472
195473
195474
195475
195476
195477
195478
......
195479
195480
195481
195482
195483
195484
195485
195486
195487
195488
195489
195490
195491
195492
195493
195494
195495
195496
195497
195498
195499
195500
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195502
195503
195504
195505
195506
195507
195508
195509
195510
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195513
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195516
195517
195518
195519
195520
195521
195522
195523
195524
195525
195526
195527
195528
195529
195530
......
195539
195540
195541
195542
195543
195544
195545
195546
195547
195548
195549
195550
195551
195552
195553
......
195887
195888
195889
195890
195891
195892
195893
195894
195895
195896
195897
195898
195899
195900
195901
195902
195903
195904
......
195915
195916
195917
195918
195919
195920
195921
195922
195923
195924
195925
195926
195927
195928
195929
195930
195931
195932
195933
195934
195935
195936
195937
195938
195939
195940
195941
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195943
195944
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195946
195947
195948
195949
195950
195951
195952
195953
195954
195955
195956
195957
195958
195959
195960
195961
......
196264
196265
196266
196267
196268
196269
196270
196271
196272
196273
196274
196275
196276
196277
196278
......
196343
196344
196345
196346
196347
196348
196349
196350
196351
196352
196353
196354
196355
196356
196357
196358
......
196741
196742
196743
196744
196745
196746
196747
196748
196749
196750
196751
196752
196753
196754
196755
196756
196757
196758
196759
196760
196761
196762
196763
196764
196765
196766
196767
196768
196769
196770
196771
196772
196773
196774
196775
196776
196777
196778
196779
196780
196781
196782
196783
196784
......
197113
197114
197115
197116
197117
197118
197119
197120
197121
197122
197123
197124
197125
197126
197127
......
197179
197180
197181
197182
197183
197184
197185
197186
197187
197188
197189
197190
197191
197192
197193
......
197330
197331
197332
197333
197334
197335
197336
197337
197338
197339
197340
197341
197342
197343
197344
197345
......
197369
197370
197371
197372
197373
197374
197375
197376
197377
197378
197379
197380
197381
197382
197383
197384
......
197427
197428
197429
197430
197431
197432
197433
197434
197435
197436
197437
197438
197439
197440
197441
197442
......
197801
197802
197803
197804
197805
197806
197807



197808
197809
197810
197811
197812
197813
197814
197815
197816
197817
197818
197819
197820
......
198197
198198
198199
198200
198201
198202
198203
198204
198205
198206
198207
198208
198209
198210
198211
......
198307
198308
198309
198310
198311
198312
198313
198314
198315
198316
198317
198318
198319
198320
198321
198322
198323
198324
198325
198326
198327
198328
198329
198330
198331
198332
198333
198334
198335
198336
198337
198338
198339
198340
198341
......
199763
199764
199765
199766
199767
199768
199769
199770
199771
199772
199773
199774
199775
199776
199777
......
201091
201092
201093
201094
201095
201096
201097

201098
201099
201100
201101
201102
201103
201104
201105
201106
201107
......
212043
212044
212045
212046
212047
212048
212049
212050
212051
212052
212053
212054
212055
212056
212057
......
215792
215793
215794
215795
215796
215797
215798
215799
215800
215801
215802
215803
215804
215805
215806
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215810
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215815
215816
215817
215818
215819
215820
215821
215822
215823
215824
215825
215826
......
215835
215836
215837
215838
215839
215840
215841
215842
215843
215844
215845
215846
215847
215848
215849
......
219880
219881
219882
219883
219884
219885
219886
219887
219888
219889
219890
219891
219892
219893
219894
219895
219896
219897
219898
219899
219900
219901
219902
219903
219904
219905
......
220206
220207
220208
220209
220210
220211
220212
220213
220214
220215
220216
220217
220218


220219
220220
220221
220222
220223
220224
220225
......
220487
220488
220489
220490
220491
220492
220493
220494
220495
220496
220497
220498
220499
220500
220501
......
220520
220521
220522
220523
220524
220525
220526
220527
220528
220529
220530
220531
220532
220533
/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.26.0.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
  "ENABLE_FTS3_TOKENIZER",
#endif
#if SQLITE_ENABLE_FTS4
  "ENABLE_FTS4",
#endif
#if SQLITE_ENABLE_FTS5
  "ENABLE_FTS5",
#endif
#if SQLITE_ENABLE_GEOPOLY
  "ENABLE_GEOPOLY",
#endif
#if SQLITE_ENABLE_HIDDEN_COLUMNS
  "ENABLE_HIDDEN_COLUMNS",
#endif
#if SQLITE_ENABLE_ICU
  "ENABLE_ICU",
#endif
................................................................................
  "ENABLE_MEMSYS3",
#endif
#if SQLITE_ENABLE_MEMSYS5
  "ENABLE_MEMSYS5",
#endif
#if SQLITE_ENABLE_MULTIPLEX
  "ENABLE_MULTIPLEX",
#endif
#if SQLITE_ENABLE_NORMALIZE
  "ENABLE_NORMALIZE",
#endif
#if SQLITE_ENABLE_NULL_TRIM
  "ENABLE_NULL_TRIM",
#endif
#if SQLITE_ENABLE_OVERSIZE_CELL_CHECK
  "ENABLE_OVERSIZE_CELL_CHECK",
#endif
................................................................................
** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.26.0"
#define SQLITE_VERSION_NUMBER 3026000
#define SQLITE_SOURCE_ID      "2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238b4f9"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_db_config()] to make sure that
** the call worked.  ^The [sqlite3_db_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>
** [[SQLITE_DBCONFIG_LOOKASIDE]]
** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
** <dd> ^This option takes three additional arguments that determine the 
** [lookaside memory allocator] configuration for the [database connection].
** ^The first argument (the third parameter to [sqlite3_db_config()] is a
** pointer to a memory buffer to use for lookaside memory.
** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
** may be NULL in which case SQLite will allocate the
................................................................................
** connection is not currently using lookaside memory, or in other words
** when the "current value" returned by
** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
** Any attempt to change the lookaside memory configuration when lookaside
** memory is in use leaves the configuration unchanged and returns 
** [SQLITE_BUSY].)^</dd>
**
** [[SQLITE_DBCONFIG_ENABLE_FKEY]]
** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
** <dd> ^This option is used to enable or disable the enforcement of
** [foreign key constraints].  There should be two additional arguments.
** The first argument is an integer which is 0 to disable FK enforcement,
** positive to enable FK enforcement or negative to leave FK enforcement
** unchanged.  The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether FK enforcement is off or on
** following this call.  The second parameter may be a NULL pointer, in
** which case the FK enforcement setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_TRIGGER]]
** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable triggers,
** positive to enable triggers or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether triggers are disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the trigger setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER]]
** <dt>SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</dt>
** <dd> ^This option is used to enable or disable the two-argument
** version of the [fts3_tokenizer()] function which is part of the
** [FTS3] full-text search engine extension.
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable fts3_tokenizer() or
** positive to enable fts3_tokenizer() or negative to leave the setting
** unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether fts3_tokenizer is disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the new setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION]]
** <dt>SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION</dt>
** <dd> ^This option is used to enable or disable the [sqlite3_load_extension()]
** interface independently of the [load_extension()] SQL function.
** The [sqlite3_enable_load_extension()] API enables or disables both the
** C-API [sqlite3_load_extension()] and the SQL function [load_extension()].
** There should be two additional arguments.
** When the first argument to this interface is 1, then only the C-API is
................................................................................
** C-API or the SQL function.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether [sqlite3_load_extension()] interface
** is disabled or enabled following this call.  The second parameter may
** be a NULL pointer, in which case the new setting is not reported back.
** </dd>
**
** [[SQLITE_DBCONFIG_MAINDBNAME]] <dt>SQLITE_DBCONFIG_MAINDBNAME</dt>
** <dd> ^This option is used to change the name of the "main" database
** schema.  ^The sole argument is a pointer to a constant UTF8 string
** which will become the new schema name in place of "main".  ^SQLite
** does not make a copy of the new main schema name string, so the application
** must ensure that the argument passed into this DBCONFIG option is unchanged
** until after the database connection closes.
** </dd>
**
** [[SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE]] 
** <dt>SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</dt>
** <dd> Usually, when a database in wal mode is closed or detached from a 
** database handle, SQLite checks if this will mean that there are now no 
** connections at all to the database. If so, it performs a checkpoint 
** operation before closing the connection. This option may be used to
** override this behaviour. The first parameter passed to this operation
** is an integer - positive to disable checkpoints-on-close, or zero (the
** default) to enable them, and negative to leave the setting unchanged.
** The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_QPSG]] <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>^(The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].)^ The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
................................................................................
** The first argument to this setting is an integer which is 0 to disable 
** the QPSG, positive to enable QPSG, or negative to leave the setting
** unchanged. The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether the QPSG is disabled or enabled
** following this call.
** </dd>
**
** [[SQLITE_DBCONFIG_TRIGGER_EQP]] <dt>SQLITE_DBCONFIG_TRIGGER_EQP</dt>
** <dd> By default, the output of EXPLAIN QUERY PLAN commands does not 
** include output for any operations performed by trigger programs. This
** option is used to set or clear (the default) a flag that governs this
** behavior. The first parameter passed to this operation is an integer -
** positive to enable output for trigger programs, or zero to disable it,
** or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which is written 
** 0 or 1 to indicate whether output-for-triggers has been disabled - 0 if 
** it is not disabled, 1 if it is.  
** </dd>
**
** [[SQLITE_DBCONFIG_RESET_DATABASE]] <dt>SQLITE_DBCONFIG_RESET_DATABASE</dt>
** <dd> Set the SQLITE_DBCONFIG_RESET_DATABASE flag and then run
** [VACUUM] in order to reset a database back to an empty database
** with no schema and no content. The following process works even for
** a badly corrupted database file:
** <ol>
** <li> If the database connection is newly opened, make sure it has read the
**      database schema by preparing then discarding some query against the
................................................................................
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
** <li> [sqlite3_exec](db, "[VACUUM]", 0, 0, 0);
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
** </ol>
** Because resetting a database is destructive and irreversible, the
** process requires the use of this obscure API and multiple steps to help
** ensure that it does not happen by accident.
**
** [[SQLITE_DBCONFIG_DEFENSIVE]] <dt>SQLITE_DBCONFIG_DEFENSIVE</dt>
** <dd>The SQLITE_DBCONFIG_DEFENSIVE option activates or deactivates the
** "defensive" flag for a database connection.  When the defensive
** flag is enabled, language features that allow ordinary SQL to 
** deliberately corrupt the database file are disabled.  The disabled
** features include but are not limited to the following:
** <ul>
** <li> The [PRAGMA writable_schema=ON] statement.
** <li> Writes to the [sqlite_dbpage] virtual table.
** <li> Direct writes to [shadow tables].
** </ul>
** </dd>
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */
#define SQLITE_DBCONFIG_TRIGGER_EQP           1008 /* int int* */
#define SQLITE_DBCONFIG_RESET_DATABASE        1009 /* int int* */
#define SQLITE_DBCONFIG_DEFENSIVE             1010 /* int int* */
#define SQLITE_DBCONFIG_MAX                   1010 /* Largest DBCONFIG */

/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
................................................................................
** probably reused many times.)^ ^Without this flag, [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()] assume that the prepared statement will 
** be used just once or at most a few times and then destroyed using
** [sqlite3_finalize()] relatively soon. The current implementation acts
** on this hint by avoiding the use of [lookaside memory] so as not to
** deplete the limited store of lookaside memory. Future versions of
** SQLite may act on this hint differently.
**
** [[SQLITE_PREPARE_NORMALIZE]] ^(<dt>SQLITE_PREPARE_NORMALIZE</dt>
** <dd>The SQLITE_PREPARE_NORMALIZE flag indicates that a normalized
** representation of the SQL statement should be calculated and then
** associated with the prepared statement, which can be obtained via
** the [sqlite3_normalized_sql()] interface.)^  The semantics used to
** normalize a SQL statement are unspecified and subject to change.
** At a minimum, literal values will be replaced with suitable
** placeholders.
** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01
#define SQLITE_PREPARE_NORMALIZE               0x02

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
................................................................................
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
** ^The sqlite3_normalized_sql(P) interface returns a pointer to a UTF-8
** string containing the normalized SQL text of prepared statement P.  The
** semantics used to normalize a SQL statement are unspecified and subject
** to change.  At a minimum, literal values will be replaced with suitable
** placeholders.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
** the original string, "SELECT $abc,:xyz" but sqlite3_expanded_sql()
** will return "SELECT 2345,NULL".)^
**
................................................................................
** is available to hold the result, or if the result would exceed the
** the maximum string length determined by the [SQLITE_LIMIT_LENGTH].
**
** ^The [SQLITE_TRACE_SIZE_LIMIT] compile-time option limits the size of
** bound parameter expansions.  ^The [SQLITE_OMIT_TRACE] compile-time
** option causes sqlite3_expanded_sql() to always return NULL.
**
** ^The strings returned by sqlite3_sql(P) and sqlite3_normalized_sql(P)
** are managed by SQLite and are automatically freed when the prepared
** statement is finalized.
** ^The string returned by sqlite3_expanded_sql(P), on the other hand,
** is obtained from [sqlite3_malloc()] and must be free by the application
** by passing it to [sqlite3_free()].
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt);
SQLITE_API char *sqlite3_expanded_sql(sqlite3_stmt *pStmt);
SQLITE_API const char *sqlite3_normalized_sql(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
................................................................................
                       void **ppArg);
  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
  /* The methods above are in version 1 of the sqlite_module object. Those 
  ** below are for version 2 and greater. */
  int (*xSavepoint)(sqlite3_vtab *pVTab, int);
  int (*xRelease)(sqlite3_vtab *pVTab, int);
  int (*xRollbackTo)(sqlite3_vtab *pVTab, int);
  /* The methods above are in versions 1 and 2 of the sqlite_module object.
  ** Those below are for version 3 and greater. */
  int (*xShadowName)(const char*);
};

/*
** CAPI3REF: Virtual Table Indexing Information
** KEYWORDS: sqlite3_index_info
**
** The sqlite3_index_info structure and its substructures is used as part
................................................................................
#define SQLITE_TESTCTRL_PENDING_BYTE            11
#define SQLITE_TESTCTRL_ASSERT                  12
#define SQLITE_TESTCTRL_ALWAYS                  13
#define SQLITE_TESTCTRL_RESERVE                 14
#define SQLITE_TESTCTRL_OPTIMIZATIONS           15
#define SQLITE_TESTCTRL_ISKEYWORD               16  /* NOT USED */
#define SQLITE_TESTCTRL_SCRATCHMALLOC           17  /* NOT USED */
#define SQLITE_TESTCTRL_INTERNAL_FUNCTIONS      17
#define SQLITE_TESTCTRL_LOCALTIME_FAULT         18
#define SQLITE_TESTCTRL_EXPLAIN_STMT            19  /* NOT USED */
#define SQLITE_TESTCTRL_ONCE_RESET_THRESHOLD    19
#define SQLITE_TESTCTRL_NEVER_CORRUPT           20
#define SQLITE_TESTCTRL_VDBE_COVERAGE           21
#define SQLITE_TESTCTRL_BYTEORDER               22
#define SQLITE_TESTCTRL_ISINIT                  23
................................................................................
** CAPI3REF: Virtual Table Configuration Options
**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>
** [[SQLITE_VTAB_CONSTRAINT_SUPPORT]]
** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
................................................................................
  unsigned int *anQueue;            /* Number of pending entries in the queue */
  int nCoord;                       /* Number of coordinates */
  int iLevel;                       /* Level of current node or entry */
  int mxLevel;                      /* The largest iLevel value in the tree */
  sqlite3_int64 iRowid;             /* Rowid for current entry */
  sqlite3_rtree_dbl rParentScore;   /* Score of parent node */
  int eParentWithin;                /* Visibility of parent node */
  int eWithin;                      /* OUT: Visibility */
  sqlite3_rtree_dbl rScore;         /* OUT: Write the score here */
  /* The following fields are only available in 3.8.11 and later */
  sqlite3_value **apSqlParam;       /* Original SQL values of parameters */
};

/*
** Allowed values for sqlite3_rtree_query.eWithin and .eParentWithin.
................................................................................
** [sqlite3changeset_invert()] functions, all changes within the changeset 
** that apply to a single table are grouped together. This means that when 
** an application iterates through a changeset using an iterator created by 
** this function, all changes that relate to a single table are visited 
** consecutively. There is no chance that the iterator will visit a change 
** the applies to table X, then one for table Y, and then later on visit 
** another change for table X.
**
** The behavior of sqlite3changeset_start_v2() and its streaming equivalent
** may be modified by passing a combination of
** [SQLITE_CHANGESETSTART_INVERT | supported flags] as the 4th parameter.
**
** Note that the sqlite3changeset_start_v2() API is still <b>experimental</b>
** and therefore subject to change.
*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset                /* Pointer to blob containing changeset */
);
SQLITE_API int sqlite3changeset_start_v2(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset,               /* Pointer to blob containing changeset */
  int flags                       /* SESSION_CHANGESETSTART_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_start_v2
**
** The following flags may passed via the 4th parameter to
** [sqlite3changeset_start_v2] and [sqlite3changeset_start_v2_strm]:
**
** <dt>SQLITE_CHANGESETAPPLY_INVERT <dd>
**   Invert the changeset while iterating through it. This is equivalent to
**   inverting a changeset using sqlite3changeset_invert() before applying it.
**   It is an error to specify this flag with a patchset.
*/
#define SQLITE_CHANGESETSTART_INVERT        0x0002


/*
** CAPI3REF: Advance A Changeset Iterator
** METHOD: sqlite3_changeset_iter
**
** This function may only be used with iterators created by function
................................................................................
  int(*xConflict)(
    void *pCtx,                   /* Copy of sixth arg to _apply() */
    int eConflict,                /* DATA, MISSING, CONFLICT, CONSTRAINT */
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase, /* OUT: Rebase data */
  int flags                       /* SESSION_CHANGESETAPPLY_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_apply_v2
**
** The following flags may passed via the 9th parameter to
** [sqlite3changeset_apply_v2] and [sqlite3changeset_apply_v2_strm]:
................................................................................
**   Usually, the sessions module encloses all operations performed by
**   a single call to apply_v2() or apply_v2_strm() in a [SAVEPOINT]. The
**   SAVEPOINT is committed if the changeset or patchset is successfully
**   applied, or rolled back if an error occurs. Specifying this flag
**   causes the sessions module to omit this savepoint. In this case, if the
**   caller has an open transaction or savepoint when apply_v2() is called, 
**   it may revert the partially applied changeset by rolling it back.
**
** <dt>SQLITE_CHANGESETAPPLY_INVERT <dd>
**   Invert the changeset before applying it. This is equivalent to inverting
**   a changeset using sqlite3changeset_invert() before applying it. It is
**   an error to specify this flag with a patchset.
*/
#define SQLITE_CHANGESETAPPLY_NOSAVEPOINT   0x0001
#define SQLITE_CHANGESETAPPLY_INVERT        0x0002

/* 
** CAPI3REF: Constants Passed To The Conflict Handler
**
** Values that may be passed as the second argument to a conflict-handler.
**
** <dl>
................................................................................
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn
);
SQLITE_API int sqlite3changeset_start_v2_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int flags
);
SQLITE_API int sqlite3session_changeset_strm(
  sqlite3_session *pSession,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3session_patchset_strm(
................................................................................
  sqlite3_rebaser *pRebaser,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);

/*
** CAPI3REF: Configure global parameters
**
** The sqlite3session_config() interface is used to make global configuration
** changes to the sessions module in order to tune it to the specific needs 
** of the application.
**
** The sqlite3session_config() interface is not threadsafe. If it is invoked
** while any other thread is inside any other sessions method then the
** results are undefined. Furthermore, if it is invoked after any sessions
** related objects have been created, the results are also undefined. 
**
** The first argument to the sqlite3session_config() function must be one
** of the SQLITE_SESSION_CONFIG_XXX constants defined below. The 
** interpretation of the (void*) value passed as the second parameter and
** the effect of calling this function depends on the value of the first
** parameter.
**
** <dl>
** <dt>SQLITE_SESSION_CONFIG_STRMSIZE<dd>
**    By default, the sessions module streaming interfaces attempt to input
**    and output data in approximately 1 KiB chunks. This operand may be used
**    to set and query the value of this configuration setting. The pointer
**    passed as the second argument must point to a value of type (int).
**    If this value is greater than 0, it is used as the new streaming data
**    chunk size for both input and output. Before returning, the (int) value
**    pointed to by pArg is set to the final value of the streaming interface
**    chunk size.
** </dl>
**
** This function returns SQLITE_OK if successful, or an SQLite error code
** otherwise.
*/
SQLITE_API int sqlite3session_config(int op, void *pArg);

/*
** CAPI3REF: Values for sqlite3session_config().
*/
#define SQLITE_SESSION_CONFIG_STRMSIZE 1

/*
** Make sure we can call this stuff from C++.
*/
#if 0
}
#endif
................................................................................

#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3PagerCheckpoint(Pager *pPager, sqlite3*, int, int*, int*);
SQLITE_PRIVATE   int sqlite3PagerWalSupported(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerWalCallback(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerOpenWal(Pager *pPager, int *pisOpen);
SQLITE_PRIVATE   int sqlite3PagerCloseWal(Pager *pPager, sqlite3*);



# ifdef SQLITE_ENABLE_SNAPSHOT
SQLITE_PRIVATE   int sqlite3PagerSnapshotGet(Pager *pPager, sqlite3_snapshot **ppSnapshot);
SQLITE_PRIVATE   int sqlite3PagerSnapshotOpen(Pager *pPager, sqlite3_snapshot *pSnapshot);
SQLITE_PRIVATE   int sqlite3PagerSnapshotRecover(Pager *pPager);
SQLITE_PRIVATE   int sqlite3PagerSnapshotCheck(Pager *pPager, sqlite3_snapshot *pSnapshot);
SQLITE_PRIVATE   void sqlite3PagerSnapshotUnlock(Pager *pPager);
# endif
#endif


#ifdef SQLITE_DIRECT_OVERFLOW_READ
SQLITE_PRIVATE   int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno);
#endif

#ifdef SQLITE_ENABLE_ZIPVFS
SQLITE_PRIVATE   int sqlite3PagerWalFramesize(Pager *pPager);
#endif

/* Functions used to query pager state and configuration. */
................................................................................

/* Return the header size */
SQLITE_PRIVATE int sqlite3HeaderSizePcache(void);
SQLITE_PRIVATE int sqlite3HeaderSizePcache1(void);

/* Number of dirty pages as a percentage of the configured cache size */
SQLITE_PRIVATE int sqlite3PCachePercentDirty(PCache*);

#ifdef SQLITE_DIRECT_OVERFLOW_READ
SQLITE_PRIVATE int sqlite3PCacheIsDirty(PCache *pCache);
#endif

#endif /* _PCACHE_H_ */

/************** End of pcache.h **********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include os.h in the middle of sqliteInt.h ********************/
/************** Begin file os.h **********************************************/
................................................................................
};

/*
** A hash table for built-in function definitions.  (Application-defined
** functions use a regular table table from hash.h.)
**
** Hash each FuncDef structure into one of the FuncDefHash.a[] slots.
** Collisions are on the FuncDef.u.pHash chain.  Use the SQLITE_FUNC_HASH()
** macro to compute a hash on the function name.
*/
#define SQLITE_FUNC_HASH_SZ 23
struct FuncDefHash {
  FuncDef *a[SQLITE_FUNC_HASH_SZ];       /* Hash table for functions */
};
#define SQLITE_FUNC_HASH(C,L) (((C)+(L))%SQLITE_FUNC_HASH_SZ)

#ifdef SQLITE_USER_AUTHENTICATION
/*
** Information held in the "sqlite3" database connection object and used
** to manage user authentication.
*/
typedef struct sqlite3_userauth sqlite3_userauth;
................................................................................
  sqlite3_vfs *pVfs;            /* OS Interface */
  struct Vdbe *pVdbe;           /* List of active virtual machines */
  CollSeq *pDfltColl;           /* The default collating sequence (BINARY) */
  sqlite3_mutex *mutex;         /* Connection mutex */
  Db *aDb;                      /* All backends */
  int nDb;                      /* Number of backends currently in use */
  u32 mDbFlags;                 /* flags recording internal state */
  u64 flags;                    /* flags settable by pragmas. See below */
  i64 lastRowid;                /* ROWID of most recent insert (see above) */
  i64 szMmap;                   /* Default mmap_size setting */
  u32 nSchemaLock;              /* Do not reset the schema when non-zero */
  unsigned int openFlags;       /* Flags passed to sqlite3_vfs.xOpen() */
  int errCode;                  /* Most recent error code (SQLITE_*) */
  int errMask;                  /* & result codes with this before returning */
  int iSysErrno;                /* Errno value from last system error */
................................................................................
#define SQLITE_QueryOnly      0x00100000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00200000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00400000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00800000  /* Query Planner Stability Guarantee*/
#define SQLITE_TriggerEQP     0x01000000  /* Show trigger EXPLAIN QUERY PLAN */
#define SQLITE_ResetDatabase  0x02000000  /* Reset the database */
#define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */
#define SQLITE_NoSchemaError  0x08000000  /* Do not report schema parse errors*/
#define SQLITE_Defensive      0x10000000  /* Input SQL is likely hostile */

/* Flags used only if debugging */
#define HI(X)  ((u64)(X)<<32)
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       HI(0x0001)  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    HI(0x0002)  /* Debug listings of VDBE progs */
#define SQLITE_VdbeTrace      HI(0x0004)  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace HI(0x0008)  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        HI(0x0010)  /* Debug EXPLAIN QUERY PLAN */
#endif

/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange   0x0001  /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin  0x0002  /* Preference to built-in funcs */
................................................................................
#define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */
#define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */
#define SQLITE_FUNC_MINMAX   0x1000 /* True for min() and max() aggregates */
#define SQLITE_FUNC_SLOCHNG  0x2000 /* "Slow Change". Value constant during a
                                    ** single query - might change over time */
#define SQLITE_FUNC_AFFINITY 0x4000 /* Built-in affinity() function */
#define SQLITE_FUNC_OFFSET   0x8000 /* Built-in sqlite_offset() function */
#define SQLITE_FUNC_WINDOW   0x00010000 /* Built-in window-only function */
#define SQLITE_FUNC_WINDOW_SIZE 0x20000 /* Requires partition size as arg. */
#define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */

/*
** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are
** used to create the initializers for the FuncDef structures.
**
**   FUNCTION(zName, nArg, iArg, bNC, xFunc)
**     Used to create a scalar function definition of a function zName
................................................................................
   (void *)arg, 0, likeFunc, 0, 0, 0, #zName, {0} }
#define AGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL), \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,0,#zName, {0}}
#define AGGREGATE2(zName, nArg, arg, nc, xStep, xFinal, extraFlags) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|extraFlags, \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xFinal,0,#zName, {0}}

#define WAGGREGATE(zName, nArg, arg, nc, xStep, xFinal, xValue, xInverse, f) \
  {nArg, SQLITE_UTF8|(nc*SQLITE_FUNC_NEEDCOLL)|f, \
   SQLITE_INT_TO_PTR(arg), 0, xStep,xFinal,xValue,xInverse,#zName, {0}}
#define INTERNAL_FUNCTION(zName, nArg, xFunc) \
  {nArg, SQLITE_FUNC_INTERNAL|SQLITE_UTF8|SQLITE_FUNC_CONSTANT, \
   0, 0, xFunc, 0, 0, 0, #zName, {0} }


/*
** All current savepoints are stored in a linked list starting at
** sqlite3.pSavepoint. The first element in the list is the most recently
** opened savepoint. Savepoints are added to the list by the vdbe
** OP_Savepoint instruction.
*/
................................................................................
/*
** The schema for each SQL table and view is represented in memory
** by an instance of the following structure.
*/
struct Table {
  char *zName;         /* Name of the table or view */
  Column *aCol;        /* Information about each column */
#ifdef SQLITE_ENABLE_NORMALIZE
  Hash *pColHash;      /* All columns indexed by name */
#endif
  Index *pIndex;       /* List of SQL indexes on this table. */
  Select *pSelect;     /* NULL for tables.  Points to definition if a view. */
  FKey *pFKey;         /* Linked list of all foreign keys in this table */
  char *zColAff;       /* String defining the affinity of each column */
  ExprList *pCheck;    /* All CHECK constraints */
                       /*   ... also used as column name list in a VIEW */
  int tnum;            /* Root BTree page for this table */
................................................................................
#define TF_HasStat1        0x0010    /* nRowLogEst set from sqlite_stat1 */
#define TF_WithoutRowid    0x0020    /* No rowid.  PRIMARY KEY is the key */
#define TF_NoVisibleRowid  0x0040    /* No user-visible "rowid" column */
#define TF_OOOHidden       0x0080    /* Out-of-Order hidden columns */
#define TF_StatsUsed       0x0100    /* Query planner decisions affected by
                                     ** Index.aiRowLogEst[] values */
#define TF_HasNotNull      0x0200    /* Contains NOT NULL constraints */
#define TF_Shadow          0x0400    /* True for a shadow table */

/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
  void *p;          /* Pointer to sampled record */
  int n;            /* Size of record in bytes */
  tRowcnt *anEq;    /* Est. number of rows where the key equals this sample */
  tRowcnt *anLt;    /* Est. number of rows where key is less than this sample */
  tRowcnt *anDLt;   /* Est. number of distinct keys less than this sample */
};

/*
** Possible values to use within the flags argument to sqlite3GetToken().
*/
#define SQLITE_TOKEN_QUOTED    0x1 /* Token is a quoted identifier. */
#define SQLITE_TOKEN_KEYWORD   0x2 /* Token is a keyword. */

/*
** Each token coming out of the lexer is an instance of
** this structure.  Tokens are also used as part of an expression.
**
** The memory that "z" points to is owned by other objects.  Take care
** that the owner of the "z" string does not deallocate the string before
** the Token goes out of scope!  Very often, the "z" points to some place
................................................................................
                         ** TK_SELECT_COLUMN: column of the result vector */
  i16 iAgg;              /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
  i16 iRightJoinTable;   /* If EP_FromJoin, the right table of the join */
  u8 op2;                /* TK_REGISTER: original value of Expr.op
                         ** TK_COLUMN: the value of p5 for OP_Column
                         ** TK_AGG_FUNCTION: nesting depth */
  AggInfo *pAggInfo;     /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */
  union {
    Table *pTab;           /* TK_COLUMN: Table containing column. Can be NULL
                           ** for a column of an index on an expression */
    Window *pWin;          /* TK_FUNCTION: Window definition for the func */
  } y;
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
................................................................................
#define EP_NoReduce  0x020000 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Unlikely  0x040000 /* unlikely() or likelihood() function */
#define EP_ConstFunc 0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
#define EP_CanBeNull 0x100000 /* Can be null despite NOT NULL constraint */
#define EP_Subquery  0x200000 /* Tree contains a TK_SELECT operator */
#define EP_Alias     0x400000 /* Is an alias for a result set column */
#define EP_Leaf      0x800000 /* Expr.pLeft, .pRight, .u.pSelect all NULL */
#define EP_WinFunc  0x1000000 /* TK_FUNCTION with Expr.y.pWin set */

/*
** The EP_Propagate mask is a set of properties that automatically propagate
** upwards into parent nodes.
*/
#define EP_Propagate (EP_Collate|EP_Subquery|EP_HasFunc)

................................................................................
  void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx);  /* Callback */
  void *pVdbeBranchArg;                                     /* 1st argument */
#endif
#ifndef SQLITE_UNTESTABLE
  int (*xTestCallback)(int);        /* Invoked by sqlite3FaultSim() */
#endif
  int bLocaltimeFault;              /* True to fail localtime() calls */
  int bInternalFunctions;           /* Internal SQL functions are visible */
  int iOnceResetThreshold;          /* When to reset OP_Once counters */
  u32 szSorterRef;                  /* Min size in bytes to use sorter-refs */
};

/*
** This macro is used inside of assert() statements to indicate that
** the assert is only valid on a well-formed database.  Instead of:
................................................................................
SQLITE_PRIVATE int sqlite3IsIdChar(u8);

/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char*,const char*);
SQLITE_PRIVATE int sqlite3Strlen30(const char*);
#define sqlite3Strlen30NN(C) (strlen(C)&0x3fffffff)
SQLITE_PRIVATE char *sqlite3ColumnType(Column*,char*);
#define sqlite3StrNICmp sqlite3_strnicmp

SQLITE_PRIVATE int sqlite3MallocInit(void);
SQLITE_PRIVATE void sqlite3MallocEnd(void);
SQLITE_PRIVATE void *sqlite3Malloc(u64);
SQLITE_PRIVATE void *sqlite3MallocZero(u64);
................................................................................
SQLITE_PRIVATE   void *sqlite3TestTextToPtr(const char*);
#endif

#if defined(SQLITE_DEBUG)
SQLITE_PRIVATE   void sqlite3TreeViewExpr(TreeView*, const Expr*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewBareExprList(TreeView*, const ExprList*, const char*);
SQLITE_PRIVATE   void sqlite3TreeViewExprList(TreeView*, const ExprList*, u8, const char*);
SQLITE_PRIVATE   void sqlite3TreeViewSrcList(TreeView*, const SrcList*);
SQLITE_PRIVATE   void sqlite3TreeViewSelect(TreeView*, const Select*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewWith(TreeView*, const With*, u8);
#ifndef SQLITE_OMIT_WINDOWFUNC
SQLITE_PRIVATE   void sqlite3TreeViewWindow(TreeView*, const Window*, u8);
SQLITE_PRIVATE   void sqlite3TreeViewWinFunc(TreeView*, const Window*, u8);
#endif
#endif
................................................................................
#ifdef SQLITE_ENABLE_CURSOR_HINTS
SQLITE_PRIVATE int sqlite3ExprContainsSubquery(Expr*);
#endif
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCanBeNull(const Expr*);
SQLITE_PRIVATE int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE int sqlite3IsRowidN(const char*, int);
#endif
SQLITE_PRIVATE void sqlite3GenerateRowDelete(
    Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8,int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*, int);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
SQLITE_PRIVATE void sqlite3ResolvePartIdxLabel(Parse*,int);
SQLITE_PRIVATE int sqlite3ExprReferencesUpdatedColumn(Expr*,int*,int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*,int*,Upsert*);
#ifdef SQLITE_ENABLE_NULL_TRIM
SQLITE_PRIVATE   void sqlite3SetMakeRecordP5(Vdbe*,Table*);
#else
# define sqlite3SetMakeRecordP5(A,B)
#endif
................................................................................
SQLITE_PRIVATE void sqlite3UniqueConstraint(Parse*, int, Index*);
SQLITE_PRIVATE void sqlite3RowidConstraint(Parse*, int, Table*);
SQLITE_PRIVATE Expr *sqlite3ExprDup(sqlite3*,Expr*,int);
SQLITE_PRIVATE ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int);
SQLITE_PRIVATE SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int);
SQLITE_PRIVATE IdList *sqlite3IdListDup(sqlite3*,IdList*);
SQLITE_PRIVATE Select *sqlite3SelectDup(sqlite3*,Select*,int);
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE FuncDef *sqlite3FunctionSearchN(int,const char*,int);
#endif
SQLITE_PRIVATE void sqlite3InsertBuiltinFuncs(FuncDef*,int);
SQLITE_PRIVATE FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,u8,u8);
SQLITE_PRIVATE void sqlite3RegisterBuiltinFunctions(void);
SQLITE_PRIVATE void sqlite3RegisterDateTimeFunctions(void);
SQLITE_PRIVATE void sqlite3RegisterPerConnectionBuiltinFunctions(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyCheckOk(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyCheckSickOrOk(sqlite3*);
................................................................................
SQLITE_PRIVATE CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
SQLITE_PRIVATE CollSeq *sqlite3ExprNNCollSeq(Parse *pParse, Expr *pExpr);
SQLITE_PRIVATE int sqlite3ExprCollSeqMatch(Parse*,Expr*,Expr*);
SQLITE_PRIVATE Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr*, const Token*, int);
SQLITE_PRIVATE Expr *sqlite3ExprAddCollateString(Parse*,Expr*,const char*);
SQLITE_PRIVATE Expr *sqlite3ExprSkipCollate(Expr*);
SQLITE_PRIVATE int sqlite3CheckCollSeq(Parse *, CollSeq *);
SQLITE_PRIVATE int sqlite3WritableSchema(sqlite3*);
SQLITE_PRIVATE int sqlite3CheckObjectName(Parse *, const char *);
SQLITE_PRIVATE void sqlite3VdbeSetChanges(sqlite3 *, int);
SQLITE_PRIVATE int sqlite3AddInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3SubInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3MulInt64(i64*,i64);
SQLITE_PRIVATE int sqlite3AbsInt32(int);
#ifdef SQLITE_ENABLE_8_3_NAMES
................................................................................
#endif
SQLITE_PRIVATE void sqlite3RootPageMoved(sqlite3*, int, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3AlterFunctions(void);
SQLITE_PRIVATE void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
SQLITE_PRIVATE void sqlite3AlterRenameColumn(Parse*, SrcList*, Token*, Token*);
SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *, int *);
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE int sqlite3GetTokenNormalized(const unsigned char *, int *, int *);
#endif
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*, int);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse*, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
................................................................................
SQLITE_PRIVATE int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *, VTable *);
SQLITE_PRIVATE FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
SQLITE_PRIVATE sqlite3_int64 sqlite3StmtCurrentTime(sqlite3_context*);
SQLITE_PRIVATE int sqlite3VdbeParameterIndex(Vdbe*, const char*, int);
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
SQLITE_PRIVATE void sqlite3ParserReset(Parse*);
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE void sqlite3Normalize(Vdbe*, const char*, int, u8);
#endif
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe*);
SQLITE_PRIVATE void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
SQLITE_PRIVATE int sqlite3TempInMemory(const sqlite3*);
SQLITE_PRIVATE const char *sqlite3JournalModename(int);
#ifndef SQLITE_OMIT_WAL
SQLITE_PRIVATE   int sqlite3Checkpoint(sqlite3*, int, int, int*, int*);
................................................................................
   0,                         /* xVdbeBranch */
   0,                         /* pVbeBranchArg */
#endif
#ifndef SQLITE_UNTESTABLE
   0,                         /* xTestCallback */
#endif
   0,                         /* bLocaltimeFault */
   0,                         /* bInternalFunctions */
   0x7ffffffe,                /* iOnceResetThreshold */
   SQLITE_DEFAULT_SORTERREF_SIZE   /* szSorterRef */
};

/*
** Hash table for global functions - functions common to all
** database connections.  After initialization, this table is
................................................................................
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for statements that do not write */
  bft bIsReader:1;        /* True for statements that read */
  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  u32 aCounter[7];        /* Counters used by sqlite3_stmt_status() */
  char *zSql;             /* Text of the SQL statement that generated this */
#ifdef SQLITE_ENABLE_NORMALIZE
  char *zNormSql;         /* Normalization of the associated SQL statement */
#endif
  void *pFree;            /* Free this when deleting the vdbe */
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
  AuxData *pAuxData;      /* Linked list of auxdata allocations */
................................................................................
SQLITE_PRIVATE u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int);

int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
SQLITE_PRIVATE int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*);
SQLITE_PRIVATE int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*);
SQLITE_PRIVATE int sqlite3VdbeExec(Vdbe*);
#ifndef SQLITE_OMIT_EXPLAIN
SQLITE_PRIVATE int sqlite3VdbeList(Vdbe*);
#endif
SQLITE_PRIVATE int sqlite3VdbeHalt(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeChangeEncoding(Mem *, int);
SQLITE_PRIVATE int sqlite3VdbeMemTooBig(Mem*);
SQLITE_PRIVATE int sqlite3VdbeMemCopy(Mem*, const Mem*);
SQLITE_PRIVATE void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int);
SQLITE_PRIVATE void sqlite3VdbeMemMove(Mem*, Mem*);
SQLITE_PRIVATE int sqlite3VdbeMemNulTerminate(Mem*);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeMemCast(Mem*,u8,u8);
SQLITE_PRIVATE int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*);
SQLITE_PRIVATE void sqlite3VdbeMemRelease(Mem *p);
SQLITE_PRIVATE int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
#ifndef SQLITE_OMIT_WINDOWFUNC
SQLITE_PRIVATE int sqlite3VdbeMemAggValue(Mem*, Mem*, FuncDef*);
#endif
#ifndef SQLITE_OMIT_EXPLAIN
SQLITE_PRIVATE const char *sqlite3OpcodeName(int);
#endif
SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
SQLITE_PRIVATE int sqlite3VdbeMemClearAndResize(Mem *pMem, int n);
SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *, int);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE int sqlite3VdbeFrameIsValid(VdbeFrame*);
#endif
SQLITE_PRIVATE void sqlite3VdbeFrameMemDel(void*);      /* Destructor on Mem */
................................................................................
      sqlite3TreeViewSelect(pView, pCte->pSelect, 0);
      sqlite3TreeViewPop(pView);
    }
    sqlite3TreeViewPop(pView);
  }
}

/*
** Generate a human-readable description of a SrcList object.
*/
SQLITE_PRIVATE void sqlite3TreeViewSrcList(TreeView *pView, const SrcList *pSrc){
  int i;
  for(i=0; i<pSrc->nSrc; i++){
    const struct SrcList_item *pItem = &pSrc->a[i];
    StrAccum x;
    char zLine[100];
    sqlite3StrAccumInit(&x, 0, zLine, sizeof(zLine), 0);
    sqlite3_str_appendf(&x, "{%d,*}", pItem->iCursor);
    if( pItem->zDatabase ){
      sqlite3_str_appendf(&x, " %s.%s", pItem->zDatabase, pItem->zName);
    }else if( pItem->zName ){
      sqlite3_str_appendf(&x, " %s", pItem->zName);
    }
    if( pItem->pTab ){
      sqlite3_str_appendf(&x, " tabname=%Q", pItem->pTab->zName);
    }
    if( pItem->zAlias ){
      sqlite3_str_appendf(&x, " (AS %s)", pItem->zAlias);
    }
    if( pItem->fg.jointype & JT_LEFT ){
      sqlite3_str_appendf(&x, " LEFT-JOIN");
    }
    sqlite3StrAccumFinish(&x);
    sqlite3TreeViewItem(pView, zLine, i<pSrc->nSrc-1); 
    if( pItem->pSelect ){
      sqlite3TreeViewSelect(pView, pItem->pSelect, 0);
    }
    if( pItem->fg.isTabFunc ){
      sqlite3TreeViewExprList(pView, pItem->u1.pFuncArg, 0, "func-args:");
    }
    sqlite3TreeViewPop(pView);
  }
}

/*
** Generate a human-readable description of a Select object.
*/
SQLITE_PRIVATE void sqlite3TreeViewSelect(TreeView *pView, const Select *p, u8 moreToFollow){
  int n = 0;
  int cnt = 0;
................................................................................
      for(pX=p->pWin; pX; pX=pX->pNextWin){
        sqlite3TreeViewWinFunc(pView, pX, pX->pNextWin!=0);
      }
      sqlite3TreeViewPop(pView);
    }
#endif
    if( p->pSrc && p->pSrc->nSrc ){

      pView = sqlite3TreeViewPush(pView, (n--)>0);
      sqlite3TreeViewLine(pView, "FROM");




























      sqlite3TreeViewSrcList(pView, p->pSrc);

      sqlite3TreeViewPop(pView);
    }
    if( p->pWhere ){
      sqlite3TreeViewItem(pView, "WHERE", (n--)>0);
      sqlite3TreeViewExpr(pView, p->pWhere, 0);
      sqlite3TreeViewPop(pView);
    }
................................................................................
      Window *pWin;
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
        pWin = 0;
      }else{
        pFarg = pExpr->x.pList;
#ifndef SQLITE_OMIT_WINDOWFUNC
        pWin = pExpr->y.pWin;
#else
        pWin = 0;
#endif 
      }
      if( pExpr->op==TK_AGG_FUNCTION ){
        sqlite3TreeViewLine(pView, "AGG_FUNCTION%d %Q",
                             pExpr->op2, pExpr->u.zToken);
................................................................................
    ** 0x9e3779b1 is 2654435761 which is the closest prime number to
    ** (2**32)*golden_ratio, where golden_ratio = (sqrt(5) - 1)/2. */
    h += sqlite3UpperToLower[c];
    h *= 0x9e3779b1;
  }
  return h;
}
#ifdef SQLITE_ENABLE_NORMALIZE
static unsigned int strHashN(const char *z, int n){
  unsigned int h = 0;
  int i;
  for(i=0; i<n; i++){
    /* Knuth multiplicative hashing.  (Sorting & Searching, p. 510).
    ** 0x9e3779b1 is 2654435761 which is the closest prime number to
    ** (2**32)*golden_ratio, where golden_ratio = (sqrt(5) - 1)/2. */
    h += sqlite3UpperToLower[z[i]];
    h *= 0x9e3779b1;
  }
  return h;
}
#endif /* SQLITE_ENABLE_NORMALIZE */


/* Link pNew element into the hash table pH.  If pEntry!=0 then also
** insert pNew into the pEntry hash bucket.
*/
static void insertElement(
  Hash *pH,              /* The complete hash table */
................................................................................
    if( sqlite3StrICmp(elem->pKey,pKey)==0 ){ 
      return elem;
    }
    elem = elem->next;
  }
  return &nullElement;
}
#ifdef SQLITE_ENABLE_NORMALIZE
static HashElem *findElementWithHashN(
  const Hash *pH,     /* The pH to be searched */
  const char *pKey,   /* The key we are searching for */
  int nKey,           /* Number of key bytes to use */
  unsigned int *pHash /* Write the hash value here */
){
  HashElem *elem;                /* Used to loop thru the element list */
  int count;                     /* Number of elements left to test */
  unsigned int h;                /* The computed hash */
  static HashElem nullElement = { 0, 0, 0, 0 };

  if( pH->ht ){   /*OPTIMIZATION-IF-TRUE*/
    struct _ht *pEntry;
    h = strHashN(pKey, nKey) % pH->htsize;
    pEntry = &pH->ht[h];
    elem = pEntry->chain;
    count = pEntry->count;
  }else{
    h = 0;
    elem = pH->first;
    count = pH->count;
  }
  if( pHash ) *pHash = h;
  while( count-- ){
    assert( elem!=0 );
    if( sqlite3StrNICmp(elem->pKey,pKey,nKey)==0 ){ 
      return elem;
    }
    elem = elem->next;
  }
  return &nullElement;
}
#endif /* SQLITE_ENABLE_NORMALIZE */

/* Remove a single entry from the hash table given a pointer to that
** element and a hash on the element's key.
*/
static void removeElementGivenHash(
  Hash *pH,         /* The pH containing "elem" */
  HashElem* elem,   /* The element to be removed from the pH */
................................................................................
** found, or NULL if there is no match.
*/
SQLITE_PRIVATE void *sqlite3HashFind(const Hash *pH, const char *pKey){
  assert( pH!=0 );
  assert( pKey!=0 );
  return findElementWithHash(pH, pKey, 0)->data;
}
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE void *sqlite3HashFindN(const Hash *pH, const char *pKey, int nKey){
  assert( pH!=0 );
  assert( pKey!=0 );
  assert( nKey>=0 );
  return findElementWithHashN(pH, pKey, nKey, 0)->data;
}
#endif /* SQLITE_ENABLE_NORMALIZE */

/* Insert an element into the hash table pH.  The key is pKey
** and the data is "data".
**
** If no element exists with a matching key, then a new
** element is created and NULL is returned.
**
................................................................................

/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1

/*
** If we are to be thread-safe, include the pthreads header.

*/
#if SQLITE_THREADSAFE
/* # include <pthread.h> */

#endif

/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
................................................................................
  /* WAS:  ino_t ino;   */
  u64 ino;                   /* Inode number */
#endif
};

/*
** An instance of the following structure is allocated for each open
** inode.

**
** A single inode can have multiple file descriptors, so each unixFile
** structure contains a pointer to an instance of this object and this
** object keeps a count of the number of unixFile pointing to it.
**
** Mutex rules:
**
................................................................................
  sem_t *pSem;                    /* Named POSIX semaphore */
  char aSemName[MAX_PATHNAME+2];  /* Name of that semaphore */
#endif
};

/*
** A lists of all unixInodeInfo objects.
**
** Must hold unixBigLock in order to read or write this variable.
*/
static unixInodeInfo *inodeList = 0;  /* All unixInodeInfo objects */

#ifdef SQLITE_DEBUG
/*
** True if the inode mutex (on the unixFile.pFileMutex field) is held, or not.
** This routine is used only within assert() to help verify correct mutex
** usage.
*/
int unixFileMutexHeld(unixFile *pFile){
  assert( pFile->pInode );
  return sqlite3_mutex_held(pFile->pInode->pLockMutex);
}
int unixFileMutexNotheld(unixFile *pFile){
  assert( pFile->pInode );
................................................................................
  }
  pInode->pUnused = 0;
}

/*
** Release a unixInodeInfo structure previously allocated by findInodeInfo().
**
** The global mutex must be held when this routine is called, but the mutex
** on the inode being deleted must NOT be held.
*/
static void releaseInodeInfo(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  assert( unixMutexHeld() );
  assert( unixFileMutexNotheld(pFile) );
  if( ALWAYS(pInode) ){
    pInode->nRef--;
................................................................................
}

/*
** Given a file descriptor, locate the unixInodeInfo object that
** describes that file descriptor.  Create a new one if necessary.  The
** return value might be uninitialized if an error occurs.
**
** The global mutex must held when calling this routine.

**
** Return an appropriate error code.
*/
static int findInodeInfo(
  unixFile *pFile,               /* Unix file with file desc used in the key */
  unixInodeInfo **ppInode        /* Return the unixInodeInfo object here */
){
................................................................................
  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
#if OS_VXWORKS
  fileId.pId = pFile->pId;
#else
  fileId.ino = (u64)statbuf.st_ino;
#endif
  assert( unixMutexHeld() );
  pInode = inodeList;
  while( pInode && memcmp(&fileId, &pInode->fileId, sizeof(fileId)) ){
    pInode = pInode->pNext;
  }
  if( pInode==0 ){
    pInode = sqlite3_malloc64( sizeof(*pInode) );
    if( pInode==0 ){
................................................................................
      pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pInode->pLockMutex==0 ){
        sqlite3_free(pInode);
        return SQLITE_NOMEM_BKPT;
      }
    }
    pInode->nRef = 1;
    assert( unixMutexHeld() );
    pInode->pNext = inodeList;
    pInode->pPrev = 0;
    if( inodeList ) inodeList->pPrev = pInode;
    inodeList = pInode;
  }else{
    pInode->nRef++;
  }
................................................................................
** unixMutexHeld() must be true when creating or destroying
** this object or while reading or writing the following fields:
**
**      nRef
**
** The following fields are read-only after the object is created:
** 
**      hShm
**      zFilename
**
** Either unixShmNode.pShmMutex must be held or unixShmNode.nRef==0 and
** unixMutexHeld() is true when reading or writing any other field
** in this structure.
*/
struct unixShmNode {
  unixInodeInfo *pInode;     /* unixInodeInfo that owns this SHM node */
  sqlite3_mutex *pShmMutex;  /* Mutex to access this object */
  char *zFilename;           /* Name of the mmapped file */
  int hShm;                  /* Open file descriptor */
  int szRegion;              /* Size of shared-memory regions */
  u16 nRegion;               /* Size of array apRegion */
  u8 isReadonly;             /* True if read-only */
  u8 isUnlocked;             /* True if no DMS lock held */
  char **apRegion;           /* Array of mapped shared-memory regions */
  int nRef;                  /* Number of unixShm objects pointing to this */
  unixShm *pFirst;           /* All unixShm objects pointing to this */
................................................................................
/*
** Structure used internally by this VFS to record the state of an
** open shared memory connection.
**
** The following fields are initialized when this object is created and
** are read-only thereafter:
**
**    unixShm.pShmNode
**    unixShm.id
**
** All other fields are read/write.  The unixShm.pShmNode->pShmMutex must
** be held while accessing any read/write fields.
*/
struct unixShm {
  unixShmNode *pShmNode;     /* The underlying unixShmNode object */
  unixShm *pNext;            /* Next unixShm with the same unixShmNode */
  u8 hasMutex;               /* True if holding the unixShmNode->pShmMutex */
  u8 id;                     /* Id of this connection within its unixShmNode */
  u16 sharedMask;            /* Mask of shared locks held */
  u16 exclMask;              /* Mask of exclusive locks held */
};

/*
** Constants used for locking
................................................................................
){
  unixShmNode *pShmNode; /* Apply locks to this open shared-memory segment */
  struct flock f;        /* The posix advisory locking structure */
  int rc = SQLITE_OK;    /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  pShmNode = pFile->pInode->pShmNode;
  assert( pShmNode->nRef==0 || sqlite3_mutex_held(pShmNode->pShmMutex) );
  assert( pShmNode->nRef>0 || unixMutexHeld() );

  /* Shared locks never span more than one byte */
  assert( n==1 || lockType!=F_RDLCK );

  /* Locks are within range */
  assert( n>=1 && n<=SQLITE_SHM_NLOCK );

  if( pShmNode->hShm>=0 ){
    /* Initialize the locking parameters */
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;
    rc = osSetPosixAdvisoryLock(pShmNode->hShm, &f, pFile);
    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
static void unixShmPurge(unixFile *pFd){
  unixShmNode *p = pFd->pInode->pShmNode;
  assert( unixMutexHeld() );
  if( p && ALWAYS(p->nRef==0) ){
    int nShmPerMap = unixShmRegionPerMap();
    int i;
    assert( p->pInode==pFd->pInode );
    sqlite3_mutex_free(p->pShmMutex);
    for(i=0; i<p->nRegion; i+=nShmPerMap){
      if( p->hShm>=0 ){
        osMunmap(p->apRegion[i], p->szRegion);
      }else{
        sqlite3_free(p->apRegion[i]);
      }
    }
    sqlite3_free(p->apRegion);
    if( p->hShm>=0 ){
      robust_close(pFd, p->hShm, __LINE__);
      p->hShm = -1;
    }
    p->pInode->pShmNode = 0;
    sqlite3_free(p);
  }
}

/*
................................................................................
  ** process might open and use the *-shm file without truncating it.
  ** And if the *-shm file has been corrupted by a power failure or
  ** system crash, the database itself may also become corrupt.  */
  lock.l_whence = SEEK_SET;
  lock.l_start = UNIX_SHM_DMS;
  lock.l_len = 1;
  lock.l_type = F_WRLCK;
  if( osFcntl(pShmNode->hShm, F_GETLK, &lock)!=0 ) {
    rc = SQLITE_IOERR_LOCK;
  }else if( lock.l_type==F_UNLCK ){
    if( pShmNode->isReadonly ){
      pShmNode->isUnlocked = 1;
      rc = SQLITE_READONLY_CANTINIT;
    }else{
      rc = unixShmSystemLock(pDbFd, F_WRLCK, UNIX_SHM_DMS, 1);
      /* The first connection to attach must truncate the -shm file.  We
      ** truncate to 3 bytes (an arbitrary small number, less than the
      ** -shm header size) rather than 0 as a system debugging aid, to
      ** help detect if a -shm file truncation is legitimate or is the work
      ** or a rogue process. */
      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 3) ){
        rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);
      }
    }
  }else if( lock.l_type==F_WRLCK ){
    rc = SQLITE_BUSY;
  }

................................................................................
    sqlite3_snprintf(nShmFilename, zShm, 
                     SQLITE_SHM_DIRECTORY "/sqlite-shm-%x-%x",
                     (u32)sStat.st_ino, (u32)sStat.st_dev);
#else
    sqlite3_snprintf(nShmFilename, zShm, "%s-shm", zBasePath);
    sqlite3FileSuffix3(pDbFd->zPath, zShm);
#endif
    pShmNode->hShm = -1;
    pDbFd->pInode->pShmNode = pShmNode;
    pShmNode->pInode = pDbFd->pInode;
    if( sqlite3GlobalConfig.bCoreMutex ){
      pShmNode->pShmMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
      if( pShmNode->pShmMutex==0 ){
        rc = SQLITE_NOMEM_BKPT;
        goto shm_open_err;
      }
    }

    if( pInode->bProcessLock==0 ){
      if( 0==sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){
        pShmNode->hShm = robust_open(zShm, O_RDWR|O_CREAT,(sStat.st_mode&0777));
      }
      if( pShmNode->hShm<0 ){
        pShmNode->hShm = robust_open(zShm, O_RDONLY, (sStat.st_mode&0777));
        if( pShmNode->hShm<0 ){
          rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShm);
          goto shm_open_err;
        }
        pShmNode->isReadonly = 1;
      }

      /* If this process is running as root, make sure that the SHM file
      ** is owned by the same user that owns the original database.  Otherwise,
      ** the original owner will not be able to connect.
      */
      robustFchown(pShmNode->hShm, sStat.st_uid, sStat.st_gid);

      rc = unixLockSharedMemory(pDbFd, pShmNode);
      if( rc!=SQLITE_OK && rc!=SQLITE_READONLY_CANTINIT ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
................................................................................
  pDbFd->pShm = p;
  unixLeaveMutex();

  /* The reference count on pShmNode has already been incremented under
  ** the cover of the unixEnterMutex() mutex and the pointer from the
  ** new (struct unixShm) object to the pShmNode has been set. All that is
  ** left to do is to link the new object into the linked list starting
  ** at pShmNode->pFirst. This must be done while holding the
  ** pShmNode->pShmMutex.
  */
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  p->pNext = pShmNode->pFirst;
  pShmNode->pFirst = p;
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  return rc;

  /* Jump here on any error */
shm_open_err:
  unixShmPurge(pDbFd);       /* This call frees pShmNode if required */
  sqlite3_free(p);
  unixLeaveMutex();
................................................................................
  if( pDbFd->pShm==0 ){
    rc = unixOpenSharedMemory(pDbFd);
    if( rc!=SQLITE_OK ) return rc;
  }

  p = pDbFd->pShm;
  pShmNode = p->pShmNode;
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  if( pShmNode->isUnlocked ){
    rc = unixLockSharedMemory(pDbFd, pShmNode);
    if( rc!=SQLITE_OK ) goto shmpage_out;
    pShmNode->isUnlocked = 0;
  }
  assert( szRegion==pShmNode->szRegion || pShmNode->nRegion==0 );
  assert( pShmNode->pInode==pDbFd->pInode );
  assert( pShmNode->hShm>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->hShm<0 || pDbFd->pInode->bProcessLock==0 );

  /* Minimum number of regions required to be mapped. */
  nReqRegion = ((iRegion+nShmPerMap) / nShmPerMap) * nShmPerMap;

  if( pShmNode->nRegion<nReqRegion ){
    char **apNew;                      /* New apRegion[] array */
    int nByte = nReqRegion*szRegion;   /* Minimum required file size */
    struct stat sStat;                 /* Used by fstat() */

    pShmNode->szRegion = szRegion;

    if( pShmNode->hShm>=0 ){
      /* The requested region is not mapped into this processes address space.
      ** Check to see if it has been allocated (i.e. if the wal-index file is
      ** large enough to contain the requested region).
      */
      if( osFstat(pShmNode->hShm, &sStat) ){
        rc = SQLITE_IOERR_SHMSIZE;
        goto shmpage_out;
      }
  
      if( sStat.st_size<nByte ){
        /* The requested memory region does not exist. If bExtend is set to
        ** false, exit early. *pp will be set to NULL and SQLITE_OK returned.
................................................................................
          static const int pgsz = 4096;
          int iPg;

          /* Write to the last byte of each newly allocated or extended page */
          assert( (nByte % pgsz)==0 );
          for(iPg=(sStat.st_size/pgsz); iPg<(nByte/pgsz); iPg++){
            int x = 0;
            if( seekAndWriteFd(pShmNode->hShm, iPg*pgsz + pgsz-1,"",1,&x)!=1 ){
              const char *zFile = pShmNode->zFilename;
              rc = unixLogError(SQLITE_IOERR_SHMSIZE, "write", zFile);
              goto shmpage_out;
            }
          }
        }
      }
................................................................................
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem;
      if( pShmNode->hShm>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->hShm, szRegion*(i64)pShmNode->nRegion
        );
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc64(nMap);
        if( pMem==0 ){
          rc = SQLITE_NOMEM_BKPT;
          goto shmpage_out;
        }
        memset(pMem, 0, nMap);
      }

      for(i=0; i<nShmPerMap; i++){
        pShmNode->apRegion[pShmNode->nRegion+i] = &((char*)pMem)[szRegion*i];
      }
      pShmNode->nRegion += nShmPerMap;
    }
................................................................................
shmpage_out:
  if( pShmNode->nRegion>iRegion ){
    *pp = pShmNode->apRegion[iRegion];
  }else{
    *pp = 0;
  }
  if( pShmNode->isReadonly && rc==SQLITE_OK ) rc = SQLITE_READONLY;
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  return rc;
}

/*
** Change the lock state for a shared-memory segment.
**
** Note that the relationship between SHAREd and EXCLUSIVE locks is a little
................................................................................
  assert( ofst>=0 && ofst+n<=SQLITE_SHM_NLOCK );
  assert( n>=1 );
  assert( flags==(SQLITE_SHM_LOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE) );
  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );
  assert( pShmNode->hShm>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->hShm<0 || pDbFd->pInode->bProcessLock==0 );

  mask = (1<<(ofst+n)) - (1<<ofst);
  assert( n>1 || mask==(1<<ofst) );
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  if( flags & SQLITE_SHM_UNLOCK ){
    u16 allMask = 0; /* Mask of locks held by siblings */

    /* See if any siblings hold this same lock */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
................................................................................
      rc = unixShmSystemLock(pDbFd, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){
        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->pShmMutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
           p->id, osGetpid(0), p->sharedMask, p->exclMask));
  return rc;
}

/*
** Implement a memory barrier or memory fence on shared memory.  
................................................................................
  pShmNode = p->pShmNode;

  assert( pShmNode==pDbFd->pInode->pShmNode );
  assert( pShmNode->pInode==pDbFd->pInode );

  /* Remove connection p from the set of connections associated
  ** with pShmNode */
  sqlite3_mutex_enter(pShmNode->pShmMutex);
  for(pp=&pShmNode->pFirst; (*pp)!=p; pp = &(*pp)->pNext){}
  *pp = p->pNext;

  /* Free the connection p */
  sqlite3_free(p);
  pDbFd->pShm = 0;
  sqlite3_mutex_leave(pShmNode->pShmMutex);

  /* If pShmNode->nRef has reached 0, then close the underlying
  ** shared-memory file, too */
  assert( unixFileMutexNotheld(pDbFd) );
  unixEnterMutex();
  assert( pShmNode->nRef>0 );
  pShmNode->nRef--;
  if( pShmNode->nRef==0 ){
    if( deleteFlag && pShmNode->hShm>=0 ){
      osUnlink(pShmNode->zFilename);
    }
    unixShmPurge(pDbFd);
  }
  unixLeaveMutex();

  return SQLITE_OK;
................................................................................
  winceLock local;        /* Locks obtained by this instance of winFile */
  winceLock *shared;      /* Global shared lock memory for the file  */
#endif
#if SQLITE_MAX_MMAP_SIZE>0
  int nFetchOut;                /* Number of outstanding xFetch references */
  HANDLE hMap;                  /* Handle for accessing memory mapping */
  void *pMapRegion;             /* Area memory mapped */
  sqlite3_int64 mmapSize;       /* Size of mapped region */

  sqlite3_int64 mmapSizeMax;    /* Configured FCNTL_MMAP_SIZE value */
#endif
};

/*
** The winVfsAppData structure is used for the pAppData member for all of the
** Win32 VFS variants.
................................................................................
*/
static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){
  winFile *pFile = (winFile*)id;  /* File handle object */
  int rc = SQLITE_OK;             /* Return code for this function */
  DWORD lastErrno;
#if SQLITE_MAX_MMAP_SIZE>0
  sqlite3_int64 oldMmapSize;
  if( pFile->nFetchOut>0 ){
    /* File truncation is a no-op if there are outstanding memory mapped
    ** pages.  This is because truncating the file means temporarily unmapping
    ** the file, and that might delete memory out from under existing cursors.
    **
    ** This can result in incremental vacuum not truncating the file,
    ** if there is an active read cursor when the incremental vacuum occurs.
    ** No real harm comes of this - the database file is not corrupted,
    ** though some folks might complain that the file is bigger than it
    ** needs to be.
    **
    ** The only feasible work-around is to defer the truncation until after
    ** all references to memory-mapped content are closed.  That is doable,
    ** but involves adding a few branches in the common write code path which
    ** could slow down normal operations slightly.  Hence, we have decided for
    ** now to simply make trancations a no-op if there are pending reads.  We
    ** can maybe revisit this decision in the future.
    */
    return SQLITE_OK;
  }
#endif

  assert( pFile );
  SimulateIOError(return SQLITE_IOERR_TRUNCATE);
  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, size=%lld, lock=%d\n",
           osGetCurrentProcessId(), pFile, pFile->h, nByte, pFile->locktype));

................................................................................
/*
** Cleans up the mapped region of the specified file, if any.
*/
#if SQLITE_MAX_MMAP_SIZE>0
static int winUnmapfile(winFile *pFile){
  assert( pFile!=0 );
  OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, hMap=%p, pMapRegion=%p, "
           "mmapSize=%lld, mmapSizeMax=%lld\n",
           osGetCurrentProcessId(), pFile, pFile->hMap, pFile->pMapRegion,
           pFile->mmapSize, pFile->mmapSizeMax));
  if( pFile->pMapRegion ){
    if( !osUnmapViewOfFile(pFile->pMapRegion) ){
      pFile->lastErrno = osGetLastError();
      OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, pMapRegion=%p, "
               "rc=SQLITE_IOERR_MMAP\n", osGetCurrentProcessId(), pFile,
               pFile->pMapRegion));
      return winLogError(SQLITE_IOERR_MMAP, pFile->lastErrno,
                         "winUnmapfile1", pFile->zPath);
    }
    pFile->pMapRegion = 0;
    pFile->mmapSize = 0;

  }
  if( pFile->hMap!=NULL ){
    if( !osCloseHandle(pFile->hMap) ){
      pFile->lastErrno = osGetLastError();
      OSTRACE(("UNMAP-FILE pid=%lu, pFile=%p, hMap=%p, rc=SQLITE_IOERR_MMAP\n",
               osGetCurrentProcessId(), pFile, pFile->hMap));
      return winLogError(SQLITE_IOERR_MMAP, pFile->lastErrno,
................................................................................
      /* Log the error, but continue normal operation using xRead/xWrite */
      OSTRACE(("MAP-FILE-MAP pid=%lu, pFile=%p, rc=%s\n",
               osGetCurrentProcessId(), pFd, sqlite3ErrName(rc)));
      return SQLITE_OK;
    }
    pFd->pMapRegion = pNew;
    pFd->mmapSize = nMap;

  }

  OSTRACE(("MAP-FILE pid=%lu, pFile=%p, rc=SQLITE_OK\n",
           osGetCurrentProcessId(), pFd));
  return SQLITE_OK;
}
#endif /* SQLITE_MAX_MMAP_SIZE>0 */
................................................................................
  }
  pFile->lastErrno = NO_ERROR;
  pFile->zPath = zName;
#if SQLITE_MAX_MMAP_SIZE>0
  pFile->hMap = NULL;
  pFile->pMapRegion = 0;
  pFile->mmapSize = 0;

  pFile->mmapSizeMax = sqlite3GlobalConfig.szMmap;
#endif

  OpenCounter(+1);
  return rc;
}

................................................................................
**   such that p was added to the list more recently than p->pDirtyNext.
**   PCache.pDirty points to the first (newest) element in the list and
**   pDirtyTail to the last (oldest).
**
**   The PCache.pSynced variable is used to optimize searching for a dirty
**   page to eject from the cache mid-transaction. It is better to eject
**   a page that does not require a journal sync than one that does. 
**   Therefore, pSynced is maintained so that it *almost* always points
**   to either the oldest page in the pDirty/pDirtyTail list that has a
**   clear PGHDR_NEED_SYNC flag or to a page that is older than this one
**   (so that the right page to eject can be found by following pDirtyPrev
**   pointers).
*/
struct PCache {
  PgHdr *pDirty, *pDirtyTail;         /* List of dirty pages in LRU order */
................................................................................
SQLITE_PRIVATE int sqlite3PCachePercentDirty(PCache *pCache){
  PgHdr *pDirty;
  int nDirty = 0;
  int nCache = numberOfCachePages(pCache);
  for(pDirty=pCache->pDirty; pDirty; pDirty=pDirty->pDirtyNext) nDirty++;
  return nCache ? (int)(((i64)nDirty * 100) / nCache) : 0;
}

#ifdef SQLITE_DIRECT_OVERFLOW_READ
/* 
** Return true if there are one or more dirty pages in the cache. Else false.
*/
SQLITE_PRIVATE int sqlite3PCacheIsDirty(PCache *pCache){
  return (pCache->pDirty!=0);
}
#endif

#if defined(SQLITE_CHECK_PAGES) || defined(SQLITE_DEBUG)
/*
** For all dirty pages currently in the cache, invoke the specified
** callback. This is only used if the SQLITE_CHECK_PAGES macro is
** defined.
*/
................................................................................
  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
};

/*
** A page is pinned if it is not on the LRU list.  To be "pinned" means
** that the page is in active use and must not be deallocated.
*/
#define PAGE_IS_PINNED(p)    ((p)->pLruNext==0)
#define PAGE_IS_UNPINNED(p)  ((p)->pLruNext!=0)

/* Each page cache (or PCache) belongs to a PGroup.  A PGroup is a set 
** of one or more PCaches that are able to recycle each other's unpinned
** pages when they are under memory pressure.  A PGroup is an instance of
................................................................................
**
** instead of
**
**   if( pPager->jfd->pMethods ){ ...
*/
#define isOpen(pFd) ((pFd)->pMethods!=0)

#ifdef SQLITE_DIRECT_OVERFLOW_READ
/*

** Return true if page pgno can be read directly from the database file
** by the b-tree layer. This is the case if:
**
**   * the database file is open,
**   * there are no dirty pages in the cache, and
**   * the desired page is not currently in the wal file.
*/

SQLITE_PRIVATE int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno){
  if( pPager->fd->pMethods==0 ) return 0;
  if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0;
#ifndef SQLITE_OMIT_WAL
  if( pPager->pWal ){
    u32 iRead = 0;
    int rc;

    rc = sqlite3WalFindFrame(pPager->pWal, pgno, &iRead);
    return (rc==SQLITE_OK && iRead==0);
  }
#endif
  return 1;
}
#endif

#ifndef SQLITE_OMIT_WAL
# define pagerUseWal(x) ((x)->pWal!=0)
#else
# define pagerUseWal(x) 0
# define pagerRollbackWal(x) 0
# define pagerWalFrames(v,w,x,y) 0
# define pagerOpenWalIfPresent(z) SQLITE_OK
................................................................................
SQLITE_PRIVATE void sqlite3PagerSetCodec(
  Pager *pPager,
  void *(*xCodec)(void*,void*,Pgno,int),
  void (*xCodecSizeChng)(void*,int,int),
  void (*xCodecFree)(void*),
  void *pCodec
){
  if( pPager->xCodecFree ){
    pPager->xCodecFree(pPager->pCodec);
  }else{
    pager_reset(pPager);
  }
  pPager->xCodec = pPager->memDb ? 0 : xCodec;
  pPager->xCodecSizeChng = xCodecSizeChng;
  pPager->xCodecFree = xCodecFree;
  pPager->pCodec = pCodec;
  setGetterMethod(pPager);
  pagerReportSize(pPager);
}
................................................................................
      pBt->usableSize = usableSize;
      pBt->pageSize = pageSize;
      freeTempSpace(pBt);
      rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
                                   pageSize-usableSize);
      return rc;
    }
    if( sqlite3WritableSchema(pBt->db)==0 && nPage>nPageFile ){
      rc = SQLITE_CORRUPT_BKPT;
      goto page1_init_failed;
    }
    /* EVIDENCE-OF: R-28312-64704 However, the usable size is not allowed to
    ** be less than 480. In other words, if the page size is 512, then the
    ** reserved space size cannot exceed 32. */
    if( usableSize<480 ){
................................................................................
  Pager *pPager = pBt->pPager;
  int rc;

  assert( eType==PTRMAP_OVERFLOW2 || eType==PTRMAP_OVERFLOW1 || 
      eType==PTRMAP_BTREE || eType==PTRMAP_ROOTPAGE );
  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( pDbPage->pBt==pBt );
  if( iDbPage<3 ) return SQLITE_CORRUPT_BKPT;

  /* Move page iDbPage from its current location to page number iFreePage */
  TRACE(("AUTOVACUUM: Moving %d to free page %d (ptr page %d type %d)\n", 
      iDbPage, iFreePage, iPtrPage, eType));
  rc = sqlite3PagerMovepage(pPager, pDbPage->pDbPage, iFreePage, isCommit);
  if( rc!=SQLITE_OK ){
    return rc;
................................................................................
          rc = getOverflowPage(pBt, nextPage, 0, &nextPage);
        }
        offset -= ovflSize;
      }else{
        /* Need to read this page properly. It contains some of the
        ** range of data that is being read (eOp==0) or written (eOp!=0).
        */



        int a = amt;
        if( a + offset > ovflSize ){
          a = ovflSize - offset;
        }

#ifdef SQLITE_DIRECT_OVERFLOW_READ
        /* If all the following are true:
        **
        **   1) this is a read operation, and 
        **   2) data is required from the start of this overflow page, and
        **   3) there are no dirty pages in the page-cache
        **   4) the database is file-backed, and
        **   5) the page is not in the WAL file
        **   6) at least 4 bytes have already been read into the output buffer 
        **
        ** then data can be read directly from the database file into the
        ** output buffer, bypassing the page-cache altogether. This speeds
        ** up loading large records that span many overflow pages.
        */
        if( eOp==0                                             /* (1) */
         && offset==0                                          /* (2) */


         && sqlite3PagerDirectReadOk(pBt->pPager, nextPage)    /* (3,4,5) */
         && &pBuf[-4]>=pBufStart                               /* (6) */
        ){
          sqlite3_file *fd = sqlite3PagerFile(pBt->pPager);
          u8 aSave[4];
          u8 *aWrite = &pBuf[-4];
          assert( aWrite>=pBufStart );                         /* due to (6) */
          memcpy(aSave, aWrite, 4);
          rc = sqlite3OsRead(fd, aWrite, a+4, (i64)pBt->pageSize*(nextPage-1));
          nextPage = get4byte(aWrite);
          memcpy(aWrite, aSave, 4);
................................................................................
  */
  if( fg & MEM_Int ){
    sqlite3_snprintf(nByte, pMem->z, "%lld", pMem->u.i);
  }else{
    assert( fg & MEM_Real );
    sqlite3_snprintf(nByte, pMem->z, "%!.15g", pMem->u.r);
  }
  assert( pMem->z!=0 );
  pMem->n = sqlite3Strlen30NN(pMem->z);
  pMem->enc = SQLITE_UTF8;
  pMem->flags |= MEM_Str|MEM_Term;
  if( bForce ) pMem->flags &= ~(MEM_Int|MEM_Real);
  sqlite3VdbeChangeEncoding(pMem, enc);
  return SQLITE_OK;
}

................................................................................
  if( p==0 ) return;
  p->prepFlags = prepFlags;
  if( (prepFlags & SQLITE_PREPARE_SAVESQL)==0 ){
    p->expmask = 0;
  }
  assert( p->zSql==0 );
  p->zSql = sqlite3DbStrNDup(p->db, z, n);
#ifdef SQLITE_ENABLE_NORMALIZE
  assert( p->zNormSql==0 );
  if( p->zSql && (prepFlags & SQLITE_PREPARE_NORMALIZE)!=0 ){
    sqlite3Normalize(p, p->zSql, n, prepFlags);
    assert( p->zNormSql!=0 || p->db->mallocFailed );
  }
#endif
}

/*
** Swap all content between two VDBE structures.
*/
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
................................................................................
  pB->pNext = pTmp;
  pTmp = pA->pPrev;
  pA->pPrev = pB->pPrev;
  pB->pPrev = pTmp;
  zTmp = pA->zSql;
  pA->zSql = pB->zSql;
  pB->zSql = zTmp;
#ifdef SQLITE_ENABLE_NORMALIZE
  zTmp = pA->zNormSql;
  pA->zNormSql = pB->zNormSql;
  pB->zNormSql = zTmp;
#endif
  pB->expmask = pA->expmask;
  pB->prepFlags = pA->prepFlags;
  memcpy(pB->aCounter, pA->aCounter, sizeof(pB->aCounter));
  pB->aCounter[SQLITE_STMTSTATUS_REPREPARE]++;
}

/*
................................................................................
    releaseMemArray(p->aVar, p->nVar);
    sqlite3DbFree(db, p->pVList);
    sqlite3DbFree(db, p->pFree);
  }
  vdbeFreeOpArray(db, p->aOp, p->nOp);
  sqlite3DbFree(db, p->aColName);
  sqlite3DbFree(db, p->zSql);
#ifdef SQLITE_ENABLE_NORMALIZE
  sqlite3DbFree(db, p->zNormSql);
#endif
#ifdef SQLITE_ENABLE_STMT_SCANSTATUS
  {
    int i;
    for(i=0; i<p->nScan; i++){
      sqlite3DbFree(db, p->aScan[i].zName);
    }
    sqlite3DbFree(db, p->aScan);
................................................................................
    z = sqlite3VdbeExpandSql(p, zSql);
    sqlite3_mutex_leave(p->db->mutex);
  }
  return z;
#endif
}

#ifdef SQLITE_ENABLE_NORMALIZE
/*
** Return the normalized SQL associated with a prepared statement.
*/
SQLITE_API const char *sqlite3_normalized_sql(sqlite3_stmt *pStmt){
  Vdbe *p = (Vdbe *)pStmt;
  return p ? p->zNormSql : 0;
}
#endif /* SQLITE_ENABLE_NORMALIZE */

#ifdef SQLITE_ENABLE_PREUPDATE_HOOK
/*
** Allocate and populate an UnpackedRecord structure based on the serialized
** record in nKey/pKey. Return a pointer to the new UnpackedRecord structure
** if successful, or a NULL pointer if an OOM error is encountered.
*/
static UnpackedRecord *vdbeUnpackRecord(
................................................................................
  }else{
    /* Rare case of a really large header */
    nVarint = sqlite3VarintLen(nHdr);
    nHdr += nVarint;
    if( nVarint<sqlite3VarintLen(nHdr) ) nHdr++;
  }
  nByte = nHdr+nData;




  /* Make sure the output register has a buffer large enough to store 
  ** the new record. The output register (pOp->p3) is not allowed to
  ** be one of the input registers (because the following call to
  ** sqlite3VdbeMemClearAndResize() could clobber the value before it is used).
  */
  if( nByte+nZero<=pOut->szMalloc ){
    /* The output register is already large enough to hold the record.
    ** No error checks or buffer enlargement is required */
    pOut->z = pOut->zMalloc;
  }else{
    /* Need to make sure that the output is not too big and then enlarge
    ** the output register to hold the full result */
    if( nByte+nZero>db->aLimit[SQLITE_LIMIT_LENGTH] ){
      goto too_big;
    }
    if( sqlite3VdbeMemClearAndResize(pOut, (int)nByte) ){
      goto no_mem;
    }
  }
  zNewRecord = (u8 *)pOut->z;

  /* Write the record */
  i = putVarint32(zNewRecord, nHdr);
  j = nHdr;
  assert( pData0<=pLast );
................................................................................
    db->mDbFlags |= DBFLAG_SchemaChange;
    p->expired = 0;
  }else
#endif
  {
    zMaster = MASTER_NAME;
    initData.db = db;
    initData.iDb = iDb;
    initData.pzErrMsg = &p->zErrMsg;
    initData.mInitFlags = 0;
    zSql = sqlite3MPrintf(db,
       "SELECT name, rootpage, sql FROM '%q'.%s WHERE %s ORDER BY rowid",
       db->aDb[iDb].zDbSName, zMaster, pOp->p4.z);
    if( zSql==0 ){
      rc = SQLITE_NOMEM_BKPT;
................................................................................
        continue;
      }else if( ExprHasProperty(pExpr, EP_xIsSelect) ){
        if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
      }else if( pExpr->x.pList ){
        if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(pExpr, EP_WinFunc) ){
        Window *pWin = pExpr->y.pWin;
        if( sqlite3WalkExprList(pWalker, pWin->pPartition) ) return WRC_Abort;
        if( sqlite3WalkExprList(pWalker, pWin->pOrderBy) ) return WRC_Abort;
        if( sqlite3WalkExpr(pWalker, pWin->pFilter) ) return WRC_Abort;
      }
#endif
    }
    break;
................................................................................
** expression node refer back to that source column.  The following changes
** are made to pExpr:
**
**    pExpr->iDb           Set the index in db->aDb[] of the database X
**                         (even if X is implied).
**    pExpr->iTable        Set to the cursor number for the table obtained
**                         from pSrcList.
**    pExpr->y.pTab        Points to the Table structure of X.Y (even if
**                         X and/or Y are implied.)
**    pExpr->iColumn       Set to the column number within the table.
**    pExpr->op            Set to TK_COLUMN.
**    pExpr->pLeft         Any expression this points to is deleted
**    pExpr->pRight        Any expression this points to is deleted.
**
** The zDb variable is the name of the database (the "X").  This value may be
................................................................................

  assert( pNC );     /* the name context cannot be NULL. */
  assert( zCol );    /* The Z in X.Y.Z cannot be NULL */
  assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );

  /* Initialize the node to no-match */
  pExpr->iTable = -1;

  ExprSetVVAProperty(pExpr, EP_NoReduce);

  /* Translate the schema name in zDb into a pointer to the corresponding
  ** schema.  If not found, pSchema will remain NULL and nothing will match
  ** resulting in an appropriate error message toward the end of this routine
  */
  if( zDb ){
................................................................................
        if( zTab ){
          const char *zTabName = pItem->zAlias ? pItem->zAlias : pTab->zName;
          assert( zTabName!=0 );
          if( sqlite3StrICmp(zTabName, zTab)!=0 ){
            continue;
          }
          if( IN_RENAME_OBJECT && pItem->zAlias ){
            sqlite3RenameTokenRemap(pParse, 0, (void*)&pExpr->y.pTab);
          }
        }
        if( 0==(cntTab++) ){
          pMatch = pItem;
        }
        for(j=0, pCol=pTab->aCol; j<pTab->nCol; j++, pCol++){
          if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
................................................................................
            pExpr->iColumn = j==pTab->iPKey ? -1 : (i16)j;
            break;
          }
        }
      }
      if( pMatch ){
        pExpr->iTable = pMatch->iCursor;
        pExpr->y.pTab = pMatch->pTab;
        /* RIGHT JOIN not (yet) supported */
        assert( (pMatch->fg.jointype & JT_RIGHT)==0 );
        if( (pMatch->fg.jointype & JT_LEFT)!=0 ){
          ExprSetProperty(pExpr, EP_CanBeNull);
        }
        pSchema = pExpr->y.pTab->pSchema;
      }
    } /* if( pSrcList ) */

#if !defined(SQLITE_OMIT_TRIGGER) || !defined(SQLITE_OMIT_UPSERT)
    /* If we have not already resolved the name, then maybe 
    ** it is a new.* or old.* trigger argument reference.  Or
    ** maybe it is an excluded.* from an upsert.
................................................................................
        if( iCol<pTab->nCol ){
          cnt++;
#ifndef SQLITE_OMIT_UPSERT
          if( pExpr->iTable==2 ){
            testcase( iCol==(-1) );
            if( IN_RENAME_OBJECT ){
              pExpr->iColumn = iCol;
              pExpr->y.pTab = pTab;
              eNewExprOp = TK_COLUMN;
            }else{
              pExpr->iTable = pNC->uNC.pUpsert->regData + iCol;
              eNewExprOp = TK_REGISTER;
              ExprSetProperty(pExpr, EP_Alias);
            }
          }else
................................................................................
              testcase( iCol==32 );
              pParse->oldmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }else{
              testcase( iCol==31 );
              testcase( iCol==32 );
              pParse->newmask |= (iCol>=32 ? 0xffffffff : (((u32)1)<<iCol));
            }
            pExpr->y.pTab = pTab;
            pExpr->iColumn = (i16)iCol;
            eNewExprOp = TK_TRIGGER;
#endif /* SQLITE_OMIT_TRIGGER */
          }
        }
      }
    }
................................................................................
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 ){
    assert( pExpr->op==TK_ID );
    if( ExprHasProperty(pExpr,EP_DblQuoted) ){
      pExpr->op = TK_STRING;
      pExpr->y.pTab = 0;
      return WRC_Prune;
    }
    if( sqlite3ExprIdToTrueFalse(pExpr) ){
      return WRC_Prune;
    }
  }

................................................................................
** Allocate and return a pointer to an expression to load the column iCol
** from datasource iSrc in SrcList pSrc.
*/
SQLITE_PRIVATE Expr *sqlite3CreateColumnExpr(sqlite3 *db, SrcList *pSrc, int iSrc, int iCol){
  Expr *p = sqlite3ExprAlloc(db, TK_COLUMN, 0, 0);
  if( p ){
    struct SrcList_item *pItem = &pSrc->a[iSrc];
    p->y.pTab = pItem->pTab;
    p->iTable = pItem->iCursor;
    if( p->y.pTab->iPKey==iCol ){
      p->iColumn = -1;
    }else{
      p->iColumn = (ynVar)iCol;
      testcase( iCol==BMS );
      testcase( iCol==BMS-1 );
      pItem->colUsed |= ((Bitmask)1)<<(iCol>=BMS ? BMS-1 : iCol);
    }
................................................................................
    case TK_ROW: {
      SrcList *pSrcList = pNC->pSrcList;
      struct SrcList_item *pItem;
      assert( pSrcList && pSrcList->nSrc==1 );
      pItem = pSrcList->a;
      assert( HasRowid(pItem->pTab) && pItem->pTab->pSelect==0 );
      pExpr->op = TK_COLUMN;
      pExpr->y.pTab = pItem->pTab;
      pExpr->iTable = pItem->iCursor;
      pExpr->iColumn = -1;
      pExpr->affinity = SQLITE_AFF_INTEGER;
      break;
    }
#endif /* defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
          && !defined(SQLITE_OMIT_SUBQUERY) */
................................................................................
          pLeft = pRight->pLeft;
          pRight = pRight->pRight;
        }
        zTable = pLeft->u.zToken;
        zColumn = pRight->u.zToken;
        if( IN_RENAME_OBJECT ){
          sqlite3RenameTokenRemap(pParse, (void*)pExpr, (void*)pRight);


          sqlite3RenameTokenRemap(pParse, (void*)&pExpr->y.pTab, (void*)pLeft);
        }
      }
      return lookupName(pParse, zDb, zTable, zColumn, pNC, pExpr);
    }

    /* Resolve function names
    */
................................................................................
        if( (pDef->funcFlags & SQLITE_FUNC_CONSTANT)==0 ){
          /* Date/time functions that use 'now', and other functions like
          ** sqlite_version() that might change over time cannot be used
          ** in an index. */
          notValid(pParse, pNC, "non-deterministic functions",
                   NC_IdxExpr|NC_PartIdx);
        }
        if( (pDef->funcFlags & SQLITE_FUNC_INTERNAL)!=0
         && pParse->nested==0
         && sqlite3Config.bInternalFunctions==0
        ){
          /* Internal-use-only functions are disallowed unless the
          ** SQL is being compiled using sqlite3NestedParse() */
          no_such_func = 1;
          pDef = 0;
        }
      }

      if( 0==IN_RENAME_OBJECT ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
          || (pDef->xValue==0 && pDef->xInverse==0)
          || (pDef->xValue && pDef->xInverse && pDef->xSFunc && pDef->xFinalize)
        );
        if( pDef && pDef->xValue==0 && ExprHasProperty(pExpr, EP_WinFunc) ){
          sqlite3ErrorMsg(pParse, 
              "%.*s() may not be used as a window function", nId, zId
          );
          pNC->nErr++;
        }else if( 
              (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
           || (is_agg && (pDef->funcFlags&SQLITE_FUNC_WINDOW) && !pExpr->y.pWin)
           || (is_agg && pExpr->y.pWin && (pNC->ncFlags & NC_AllowWin)==0)
        ){
          const char *zType;
          if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->y.pWin ){
            zType = "window";
          }else{
            zType = "aggregate";
          }
          sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()",zType,nId,zId);
          pNC->nErr++;
          is_agg = 0;
................................................................................
        }else if( wrong_num_args ){
          sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
               nId, zId);
          pNC->nErr++;
        }
        if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
          pNC->ncFlags &= ~(pExpr->y.pWin ? NC_AllowWin : NC_AllowAgg);
#else
          pNC->ncFlags &= ~NC_AllowAgg;
#endif
        }
      }
      sqlite3WalkExprList(pWalker, pList);
      if( is_agg ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( pExpr->y.pWin ){
          Select *pSel = pNC->pWinSelect;
          sqlite3WalkExprList(pWalker, pExpr->y.pWin->pPartition);
          sqlite3WalkExprList(pWalker, pExpr->y.pWin->pOrderBy);
          sqlite3WalkExpr(pWalker, pExpr->y.pWin->pFilter);
          sqlite3WindowUpdate(pParse, pSel->pWinDefn, pExpr->y.pWin, pDef);
          if( 0==pSel->pWin 
           || 0==sqlite3WindowCompare(pParse, pSel->pWin, pExpr->y.pWin) 
          ){
            pExpr->y.pWin->pNextWin = pSel->pWin;
            pSel->pWin = pExpr->y.pWin;
          }
          pNC->ncFlags |= NC_AllowWin;
        }else
#endif /* SQLITE_OMIT_WINDOWFUNC */
        {
          NameContext *pNC2 = pNC;
          pExpr->op = TK_AGG_FUNCTION;
................................................................................
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
#ifndef SQLITE_OMIT_WINDOWFUNC
        if( ExprHasProperty(pE, EP_WinFunc) ){
          /* Since this window function is being changed into a reference
          ** to the same window function the result set, remove the instance
          ** of this window function from the Select.pWin list. */
          Window **pp;
          for(pp=&pSelect->pWin; *pp; pp=&(*pp)->pNextWin){
            if( *pp==pE->y.pWin ){
              *pp = (*pp)->pNextWin;
            }    
          }
        }
#endif
        pItem->u.x.iOrderByCol = j+1;
      }
................................................................................
  if( op==TK_REGISTER ) op = pExpr->op2;
#ifndef SQLITE_OMIT_CAST
  if( op==TK_CAST ){
    assert( !ExprHasProperty(pExpr, EP_IntValue) );
    return sqlite3AffinityType(pExpr->u.zToken, 0);
  }
#endif
  if( (op==TK_AGG_COLUMN || op==TK_COLUMN) && pExpr->y.pTab ){
    return sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
  }
  if( op==TK_SELECT_COLUMN ){
    assert( pExpr->pLeft->flags&EP_xIsSelect );
    return sqlite3ExprAffinity(
        pExpr->pLeft->x.pSelect->pEList->a[pExpr->iColumn].pExpr
    );
  }
................................................................................
  CollSeq *pColl = 0;
  Expr *p = pExpr;
  while( p ){
    int op = p->op;
    if( p->flags & EP_Generic ) break;
    if( (op==TK_AGG_COLUMN || op==TK_COLUMN
          || op==TK_REGISTER || op==TK_TRIGGER)
     && p->y.pTab!=0
    ){
      /* op==TK_REGISTER && p->y.pTab!=0 happens when pExpr was originally
      ** a TK_COLUMN but was previously evaluated and cached in a register */
      int j = p->iColumn;
      if( j>=0 ){
        const char *zColl = p->y.pTab->aCol[j].zColl;
        pColl = sqlite3FindCollSeq(db, ENC(db), zColl, 0);
      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
................................................................................
/*
** Recursively delete an expression tree.
*/
static SQLITE_NOINLINE void sqlite3ExprDeleteNN(sqlite3 *db, Expr *p){
  assert( p!=0 );
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );

  assert( !ExprHasProperty(p, EP_WinFunc) || p->y.pWin!=0 || db->mallocFailed );
  assert( p->op!=TK_FUNCTION || ExprHasProperty(p, EP_TokenOnly|EP_Reduced)
          || p->y.pWin==0 || ExprHasProperty(p, EP_WinFunc) );
#ifdef SQLITE_DEBUG
  if( ExprHasProperty(p, EP_Leaf) && !ExprHasProperty(p, EP_TokenOnly) ){
    assert( p->pLeft==0 );
    assert( p->pRight==0 );
    assert( p->x.pSelect==0 );
  }
#endif
................................................................................
    if( p->pRight ){
      sqlite3ExprDeleteNN(db, p->pRight);
    }else if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
    if( ExprHasProperty(p, EP_WinFunc) ){
      assert( p->op==TK_FUNCTION );
      sqlite3WindowDelete(db, p->y.pWin);
    }
  }
  if( ExprHasProperty(p, EP_MemToken) ) sqlite3DbFree(db, p->u.zToken);
  if( !ExprHasProperty(p, EP_Static) ){
    sqlite3DbFreeNN(db, p);
  }
}
................................................................................
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  assert( flags==EXPRDUP_REDUCE || flags==0 ); /* Only one flag value allowed */
  assert( EXPR_FULLSIZE<=0xfff );
  assert( (0xfff & (EP_Reduced|EP_TokenOnly))==0 );
  if( 0==flags || p->op==TK_SELECT_COLUMN 
#ifndef SQLITE_OMIT_WINDOWFUNC
   || ExprHasProperty(p, EP_WinFunc)
#endif
  ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( !ExprHasProperty(p, EP_MemToken) );
................................................................................
** This function returns the space in bytes required to store the copy 
** of the Expr structure and a copy of the Expr.u.zToken string (if that
** string is defined.)
*/
static int dupedExprNodeSize(Expr *p, int flags){
  int nByte = dupedExprStructSize(p, flags) & 0xfff;
  if( !ExprHasProperty(p, EP_IntValue) && p->u.zToken ){
    nByte += sqlite3Strlen30NN(p->u.zToken)+1;
  }
  return ROUND8(nByte);
}

/*
** Return the number of bytes required to create a duplicate of the 
** expression passed as the first argument. The second argument is a
................................................................................
        pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, dupFlags);
      }else{
        pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, dupFlags);
      }
    }

    /* Fill in pNew->pLeft and pNew->pRight. */
    if( ExprHasProperty(pNew, EP_Reduced|EP_TokenOnly|EP_WinFunc) ){
      zAlloc += dupedExprNodeSize(p, dupFlags);

      if( !ExprHasProperty(pNew, EP_TokenOnly|EP_Leaf) ){
        pNew->pLeft = p->pLeft ?
                      exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc) : 0;
        pNew->pRight = p->pRight ?
                       exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc) : 0;
      }

#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(p, EP_WinFunc) ){


        pNew->y.pWin = sqlite3WindowDup(db, pNew, p->y.pWin);
        assert( ExprHasProperty(pNew, EP_WinFunc) );
      }
#endif /* SQLITE_OMIT_WINDOWFUNC */
      if( pzBuffer ){
        *pzBuffer = zAlloc;
      }
    }else{
      if( !ExprHasProperty(p, EP_TokenOnly|EP_Leaf) ){
        if( pNew->op==TK_SELECT_COLUMN ){
          pNew->pLeft = p->pLeft;
          assert( p->iColumn==0 || p->pRight==0 );
          assert( p->pRight==0  || p->pRight==p->pLeft );
        }else{
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
        }
        pNew->pRight = sqlite3ExprDup(db, p->pRight, 0);
      }
    }



  }
  return pNew;
}

/*
** Create and return a deep copy of the object passed as the second 
** argument. If an OOM condition is encountered, NULL is returned
................................................................................
    case TK_INTEGER:
    case TK_STRING:
    case TK_FLOAT:
    case TK_BLOB:
      return 0;
    case TK_COLUMN:
      return ExprHasProperty(p, EP_CanBeNull) ||
             p->y.pTab==0 ||  /* Reference to column of index on expression */
             (p->iColumn>=0 && p->y.pTab->aCol[p->iColumn].notNull==0);
    default:
      return 1;
  }
}

/*
** Return TRUE if the given expression is a constant which would be
................................................................................
*/
SQLITE_PRIVATE int sqlite3IsRowid(const char *z){
  if( sqlite3StrICmp(z, "_ROWID_")==0 ) return 1;
  if( sqlite3StrICmp(z, "ROWID")==0 ) return 1;
  if( sqlite3StrICmp(z, "OID")==0 ) return 1;
  return 0;
}
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE int sqlite3IsRowidN(const char *z, int n){
  if( sqlite3StrNICmp(z, "_ROWID_", n)==0 ) return 1;
  if( sqlite3StrNICmp(z, "ROWID", n)==0 ) return 1;
  if( sqlite3StrNICmp(z, "OID", n)==0 ) return 1;
  return 0;
}
#endif

/*
** pX is the RHS of an IN operator.  If pX is a SELECT statement 
** that can be simplified to a direct table access, then return
** a pointer to the SELECT statement.  If pX is not a SELECT statement,
** or if the SELECT statement needs to be manifested into a transient
** table, then return NULL.
................................................................................
        /* This COLUMN expression is really a constant due to WHERE clause
        ** constraints, and that constant is coded by the pExpr->pLeft
        ** expresssion.  However, make sure the constant has the correct
        ** datatype by applying the Affinity of the table column to the
        ** constant.
        */
        int iReg = sqlite3ExprCodeTarget(pParse, pExpr->pLeft,target);
        int aff = sqlite3TableColumnAffinity(pExpr->y.pTab, pExpr->iColumn);
        if( aff!=SQLITE_AFF_BLOB ){
          static const char zAff[] = "B\000C\000D\000E";
          assert( SQLITE_AFF_BLOB=='A' );
          assert( SQLITE_AFF_TEXT=='B' );
          if( iReg!=target ){
            sqlite3VdbeAddOp2(v, OP_SCopy, iReg, target);
            iReg = target;
................................................................................
          return pExpr->iColumn - pParse->iSelfTab;
        }else{
          /* Coding an expression that is part of an index where column names
          ** in the index refer to the table to which the index belongs */
          iTab = pParse->iSelfTab - 1;
        }
      }
      return sqlite3ExprCodeGetColumn(pParse, pExpr->y.pTab,
                               pExpr->iColumn, iTab, target,
                               pExpr->op2);
    }
    case TK_INTEGER: {
      codeInteger(pParse, pExpr, 0, target);
      return target;
    }
................................................................................
      u32 constMask = 0;     /* Mask of function arguments that are constant */
      int i;                 /* Loop counter */
      sqlite3 *db = pParse->db;  /* The database connection */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

#ifndef SQLITE_OMIT_WINDOWFUNC
      if( ExprHasProperty(pExpr, EP_WinFunc) ){
        return pExpr->y.pWin->regResult;
      }
#endif

      if( ConstFactorOk(pParse) && sqlite3ExprIsConstantNotJoin(pExpr) ){
        /* SQL functions can be expensive. So try to move constant functions
        ** out of the inner loop, even if that means an extra OP_Copy. */
        return sqlite3ExprCodeAtInit(pParse, pExpr, -1);
................................................................................
      **
      ** Then p1 is interpreted as follows:
      **
      **   p1==0   ->    old.rowid     p1==3   ->    new.rowid
      **   p1==1   ->    old.a         p1==4   ->    new.a
      **   p1==2   ->    old.b         p1==5   ->    new.b       
      */
      Table *pTab = pExpr->y.pTab;
      int p1 = pExpr->iTable * (pTab->nCol+1) + 1 + pExpr->iColumn;

      assert( pExpr->iTable==0 || pExpr->iTable==1 );
      assert( pExpr->iColumn>=-1 && pExpr->iColumn<pTab->nCol );
      assert( pTab->iPKey<0 || pExpr->iColumn!=pTab->iPKey );
      assert( p1>=0 && p1<(pTab->nCol*2+2) );

      sqlite3VdbeAddOp2(v, OP_Param, p1, target);
      VdbeComment((v, "r[%d]=%s.%s", target,
        (pExpr->iTable ? "new" : "old"),
        (pExpr->iColumn<0 ? "rowid" : pExpr->y.pTab->aCol[pExpr->iColumn].zName)
      ));

#ifndef SQLITE_OMIT_FLOATING_POINT
      /* If the column has REAL affinity, it may currently be stored as an
      ** integer. Use OP_RealAffinity to make sure it is really real.
      **
      ** EVIDENCE-OF: R-60985-57662 SQLite will convert the value back to
................................................................................
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
#ifndef SQLITE_OMIT_WINDOWFUNC
      /* Justification for the assert():
      ** window functions have p->op==TK_FUNCTION but aggregate functions
      ** have p->op==TK_AGG_FUNCTION.  So any comparison between an aggregate
      ** function and a window function should have failed before reaching
      ** this point.  And, it is not possible to have a window function and
      ** a scalar function with the same name and number of arguments.  So
      ** if we reach this point, either A and B both window functions or
      ** neither are a window functions. */
      assert( ExprHasProperty(pA,EP_WinFunc)==ExprHasProperty(pB,EP_WinFunc) );
      if( ExprHasProperty(pA,EP_WinFunc) ){
        if( sqlite3WindowCompare(pParse,pA->y.pWin,pB->y.pWin)!=0 ) return 2;
      }
#endif
    }else if( pA->op==TK_COLLATE ){
      if( sqlite3_stricmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
................................................................................
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    assert( (combinedFlags & EP_Reduced)==0 );
    if( pA->op!=TK_STRING && pA->op!=TK_TRUEFALSE ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }















  }
  return 0;
}

/*
** Compare two ExprList objects.  Return 0 if they are identical and 
** non-zero if they differ in any way.
................................................................................
    case TK_GE:
      testcase( pExpr->op==TK_EQ );
      testcase( pExpr->op==TK_NE );
      testcase( pExpr->op==TK_LT );
      testcase( pExpr->op==TK_LE );
      testcase( pExpr->op==TK_GT );
      testcase( pExpr->op==TK_GE );
      if( (pExpr->pLeft->op==TK_COLUMN && IsVirtual(pExpr->pLeft->y.pTab))
       || (pExpr->pRight->op==TK_COLUMN && IsVirtual(pExpr->pRight->y.pTab))
      ){
       return WRC_Prune;
      }
    default:
      return WRC_Continue;
  }
}
................................................................................
                break;
              }
            }
            if( (k>=pAggInfo->nColumn)
             && (k = addAggInfoColumn(pParse->db, pAggInfo))>=0 
            ){
              pCol = &pAggInfo->aCol[k];
              pCol->pTab = pExpr->y.pTab;
              pCol->iTable = pExpr->iTable;
              pCol->iColumn = pExpr->iColumn;
              pCol->iMem = ++pParse->nMem;
              pCol->iSorterColumn = -1;
              pCol->pExpr = pExpr;
              if( pAggInfo->pGroupBy ){
                int j, n;
................................................................................
  }
}
#else
# define renameTokenCheckAll(x,y)
#endif

/*
** Remember that the parser tree element pPtr was created using
** the token pToken.
**
** In other words, construct a new RenameToken object and add it
** to the list of RenameToken objects currently being built up
** in pParse->pRename.
**
** The pPtr argument is returned so that this routine can be used
** with tail recursion in tokenExpr() routine, for a small performance
** improvement.
*/
SQLITE_PRIVATE void *sqlite3RenameTokenMap(Parse *pParse, void *pPtr, Token *pToken){
  RenameToken *pNew;
  assert( pPtr || pParse->db->mallocFailed );
  renameTokenCheckAll(pParse, pPtr);
  pNew = sqlite3DbMallocZero(pParse->db, sizeof(RenameToken));
  if( pNew ){
................................................................................
  if( pExpr->op==TK_TRIGGER 
   && pExpr->iColumn==p->iCol 
   && pWalker->pParse->pTriggerTab==p->pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }else if( pExpr->op==TK_COLUMN 
   && pExpr->iColumn==p->iCol 
   && p->pTab==pExpr->y.pTab
  ){
    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
  }
  return WRC_Continue;
}

/*
................................................................................
  memset(&sNC, 0, sizeof(sNC));
  sNC.pParse = pParse;
  assert( pNew->pTabSchema );
  pParse->pTriggerTab = sqlite3FindTable(db, pNew->table, 
      db->aDb[sqlite3SchemaToIndex(db, pNew->pTabSchema)].zDbSName
  );
  pParse->eTriggerOp = pNew->op;
  /* ALWAYS() because if the table of the trigger does not exist, the
  ** error would have been hit before this point */
  if( ALWAYS(pParse->pTriggerTab) ){
    rc = sqlite3ViewGetColumnNames(pParse, pParse->pTriggerTab);
  }

  /* Resolve symbols in WHEN clause */
  if( rc==SQLITE_OK && pNew->pWhen ){
    rc = sqlite3ResolveExprNames(&sNC, pNew->pWhen);
  }

  for(pStep=pNew->step_list; rc==SQLITE_OK && pStep; pStep=pStep->pNext){
    if( pStep->pSelect ){
      sqlite3SelectPrep(pParse, pStep->pSelect, &sNC);
      if( pParse->nErr ) rc = pParse->rc;
................................................................................
**   8. bTemp:    True if zSql comes from temp schema
**
** Do a column rename operation on the CREATE statement given in zSql.
** The iCol-th column (left-most is 0) of table zTable is renamed from zCol
** into zNew.  The name should be quoted if bQuote is true.
**
** This function is used internally by the ALTER TABLE RENAME COLUMN command.
** It is only accessible to SQL created using sqlite3NestedParse().  It is
** not reachable from ordinary SQL passed into sqlite3_prepare().







*/
static void renameColumnFunc(
  sqlite3_context *context,
  int NotUsed,
  sqlite3_value **argv
){
  sqlite3 *db = sqlite3_context_db_handle(context);
................................................................................
}

/*
** Walker expression callback used by "RENAME TABLE". 
*/
static int renameTableExprCb(Walker *pWalker, Expr *pExpr){
  RenameCtx *p = pWalker->u.pRename;
  if( pExpr->op==TK_COLUMN && p->pTab==pExpr->y.pTab ){
    renameTokenFind(pWalker->pParse, p, (void*)&pExpr->y.pTab);
  }
  return WRC_Continue;
}

/*
** Walker select callback used by "RENAME TABLE". 
*/
................................................................................
            sqlite3SelectPrep(&sParse, pTab->pSelect, &sNC);
            if( sParse.nErr ) rc = sParse.rc;
            sqlite3WalkSelect(&sWalker, pTab->pSelect);
          }
        }else{
          /* Modify any FK definitions to point to the new table. */
#ifndef SQLITE_OMIT_FOREIGN_KEY
          if( isLegacy==0 || (db->flags & SQLITE_ForeignKeys) ){
            FKey *pFKey;
            for(pFKey=pTab->pFKey; pFKey; pFKey=pFKey->pNextFrom){
              if( sqlite3_stricmp(pFKey->zTo, zOld)==0 ){
                renameTokenFind(&sParse, &sCtx, (void*)pFKey->zTo);
              }
            }
          }
................................................................................
}

/*
** Register built-in functions used to help implement ALTER TABLE
*/
SQLITE_PRIVATE void sqlite3AlterFunctions(void){
  static FuncDef aAlterTableFuncs[] = {
    INTERNAL_FUNCTION(sqlite_rename_column, 9, renameColumnFunc),
    INTERNAL_FUNCTION(sqlite_rename_table,  7, renameTableFunc),
    INTERNAL_FUNCTION(sqlite_rename_test,   5, renameTableTest),
  };
  sqlite3InsertBuiltinFuncs(aAlterTableFuncs, ArraySize(aAlterTableFuncs));
}
#endif  /* SQLITE_ALTER_TABLE */

/************** End of alter.c ***********************************************/
/************** Begin file analyze.c *****************************************/
................................................................................
    ** reopen it as a MemDB */
    pVfs = sqlite3_vfs_find("memdb");
    if( pVfs==0 ) return;
    pNew = &db->aDb[db->init.iDb];
    if( pNew->pBt ) sqlite3BtreeClose(pNew->pBt);
    pNew->pBt = 0;
    pNew->pSchema = 0;
    rc = sqlite3BtreeOpen(pVfs, "x\0", db, &pNew->pBt, 0, SQLITE_OPEN_MAIN_DB);
  }else{
    /* This is a real ATTACH
    **
    ** Check for the following errors:
    **
    **     * Too many attached databases,
    **     * Transaction currently open
................................................................................
  Table *pTab = 0;      /* The table being read */
  const char *zCol;     /* Name of the column of the table */
  int iSrc;             /* Index in pTabList->a[] of table being read */
  int iDb;              /* The index of the database the expression refers to */
  int iCol;             /* Index of column in table */

  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );
  assert( !IN_RENAME_OBJECT || db->xAuth==0 );
  if( db->xAuth==0 ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
  if( iDb<0 ){
    /* An attempt to read a column out of a subquery or other
    ** temporary table. */
    return;
  }
................................................................................
){
  sqlite3 *db = pParse->db;
  int rc;

  /* Don't do any authorization checks if the database is initialising
  ** or if the parser is being invoked from within sqlite3_declare_vtab.
  */
  assert( !IN_RENAME_OBJECT || db->xAuth==0 );
  if( db->init.busy || IN_SPECIAL_PARSE ){
    return SQLITE_OK;
  }

  if( db->xAuth==0 ){
    return SQLITE_OK;
  }
................................................................................
    return 0;
  }

  p = sqlite3FindTable(db, zName, zDbase);
  if( p==0 ){
    const char *zMsg = flags & LOCATE_VIEW ? "no such view" : "no such table";
#ifndef SQLITE_OMIT_VIRTUALTABLE

    /* If zName is the not the name of a table in the schema created using
    ** CREATE, then check to see if it is the name of an virtual table that
    ** can be an eponymous virtual table. */
    Module *pMod = (Module*)sqlite3HashFind(&db->aModule, zName);
    if( pMod==0 && sqlite3_strnicmp(zName, "pragma_", 7)==0 ){
      pMod = sqlite3PragmaVtabRegister(db, zName);
    }
    if( pMod && sqlite3VtabEponymousTableInit(pParse, pMod) ){
      return pMod->pEpoTab;

    }
#endif
    if( (flags & LOCATE_NOERR)==0 ){
      if( zDbase ){
        sqlite3ErrorMsg(pParse, "%s: %s.%s", zMsg, zDbase, zName);
      }else{
        sqlite3ErrorMsg(pParse, "%s: %s", zMsg, zName);
................................................................................
/*
** Erase all schema information from all attached databases (including
** "main" and "temp") for a single database connection.
*/
SQLITE_PRIVATE void sqlite3ResetAllSchemasOfConnection(sqlite3 *db){
  int i;
  sqlite3BtreeEnterAll(db);

  for(i=0; i<db->nDb; i++){
    Db *pDb = &db->aDb[i];
    if( pDb->pSchema ){
      if( db->nSchemaLock==0 ){
        sqlite3SchemaClear(pDb->pSchema);
      }else{
        DbSetProperty(db, i, DB_ResetWanted);
      }
    }
  }
  db->mDbFlags &= ~(DBFLAG_SchemaChange|DBFLAG_SchemaKnownOk);
  sqlite3VtabUnlockList(db);
  sqlite3BtreeLeaveAll(db);
  if( db->nSchemaLock==0 ){
    sqlite3CollapseDatabaseArray(db);
  }
}

/*
** This routine is called when a commit occurs.
*/
SQLITE_PRIVATE void sqlite3CommitInternalChanges(sqlite3 *db){
  db->mDbFlags &= ~DBFLAG_SchemaChange;
................................................................................
  }

  /* Delete any foreign keys attached to this table. */
  sqlite3FkDelete(db, pTable);

  /* Delete the Table structure itself.
  */
#ifdef SQLITE_ENABLE_NORMALIZE
  if( pTable->pColHash ){
    sqlite3HashClear(pTable->pColHash);
    sqlite3_free(pTable->pColHash);
  }
#endif
  sqlite3DeleteColumnNames(db, pTable);
  sqlite3DbFree(db, pTable->zName);
  sqlite3DbFree(db, pTable->zColAff);
  sqlite3SelectDelete(db, pTable->pSelect);
  sqlite3ExprListDelete(db, pTable->pCheck);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3VtabClear(db, pTable);
................................................................................
    assert( db->init.iDb==0 || db->init.busy || IN_RENAME_OBJECT
             || (db->mDbFlags & DBFLAG_Vacuum)!=0);
    iDb = db->init.iDb;
    *pUnqual = pName1;
  }
  return iDb;
}

/*
** True if PRAGMA writable_schema is ON
*/
SQLITE_PRIVATE int sqlite3WritableSchema(sqlite3 *db){
  testcase( (db->flags&(SQLITE_WriteSchema|SQLITE_Defensive))==0 );
  testcase( (db->flags&(SQLITE_WriteSchema|SQLITE_Defensive))==
               SQLITE_WriteSchema );
  testcase( (db->flags&(SQLITE_WriteSchema|SQLITE_Defensive))==
               SQLITE_Defensive );
  testcase( (db->flags&(SQLITE_WriteSchema|SQLITE_Defensive))==
               (SQLITE_WriteSchema|SQLITE_Defensive) );
  return (db->flags&(SQLITE_WriteSchema|SQLITE_Defensive))==SQLITE_WriteSchema;
}

/*
** This routine is used to check if the UTF-8 string zName is a legal
** unqualified name for a new schema object (table, index, view or
** trigger). All names are legal except those that begin with the string
** "sqlite_" (in upper, lower or mixed case). This portion of the namespace
** is reserved for internal use.
*/
SQLITE_PRIVATE int sqlite3CheckObjectName(Parse *pParse, const char *zName){
  if( !pParse->db->init.busy && pParse->nested==0 
          && sqlite3WritableSchema(pParse->db)==0
          && 0==sqlite3StrNICmp(zName, "sqlite_", 7) ){
    sqlite3ErrorMsg(pParse, "object name reserved for internal use: %s", zName);
    return SQLITE_ERROR;
  }
  return SQLITE_OK;
}

................................................................................
    assert( pTab->nCol==j );
  }else{
    pPk->nColumn = pTab->nCol;
  }
  recomputeColumnsNotIndexed(pPk);
}

#ifndef SQLITE_OMIT_VIRTUALTABLE
/*
** Return true if zName is a shadow table name in the current database
** connection.
**
** zName is temporarily modified while this routine is running, but is
** restored to its original value prior to this routine returning.
*/
static int isShadowTableName(sqlite3 *db, char *zName){
  char *zTail;                  /* Pointer to the last "_" in zName */
  Table *pTab;                  /* Table that zName is a shadow of */
  Module *pMod;                 /* Module for the virtual table */

  zTail = strrchr(zName, '_');
  if( zTail==0 ) return 0;
  *zTail = 0;
  pTab = sqlite3FindTable(db, zName, 0);
  *zTail = '_';
  if( pTab==0 ) return 0;
  if( !IsVirtual(pTab) ) return 0;
  pMod = (Module*)sqlite3HashFind(&db->aModule, pTab->azModuleArg[0]);
  if( pMod==0 ) return 0;
  if( pMod->pModule->iVersion<3 ) return 0;
  if( pMod->pModule->xShadowName==0 ) return 0;
  return pMod->pModule->xShadowName(zTail+1);
}
#else
# define isShadowTableName(x,y) 0
#endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */

/*
** This routine is called to report the final ")" that terminates
** a CREATE TABLE statement.
**
** The table structure that other action routines have been building
** is added to the internal hash tables, assuming no errors have
** occurred.
................................................................................

  if( pEnd==0 && pSelect==0 ){
    return;
  }
  assert( !db->mallocFailed );
  p = pParse->pNewTable;
  if( p==0 ) return;

  if( pSelect==0 && isShadowTableName(db, p->zName) ){
    p->tabFlags |= TF_Shadow;
  }

  /* If the db->init.busy is 1 it means we are reading the SQL off the
  ** "sqlite_master" or "sqlite_temp_master" table on the disk.
  ** So do not write to the disk again.  Extract the root page number
  ** for the table from the db->init.newTnum field.  (The page number
  ** should have been put there by the sqliteOpenCb routine.)
  **
................................................................................
** Also write code to modify the sqlite_master table and internal schema
** if a root-page of another table is moved by the btree-layer whilst
** erasing iTable (this can happen with an auto-vacuum database).
*/ 
static void destroyRootPage(Parse *pParse, int iTable, int iDb){
  Vdbe *v = sqlite3GetVdbe(pParse);
  int r1 = sqlite3GetTempReg(pParse);
  if( iTable<2 ) sqlite3ErrorMsg(pParse, "corrupt schema");
  sqlite3VdbeAddOp3(v, OP_Destroy, iTable, r1, iDb);
  sqlite3MayAbort(pParse);
#ifndef SQLITE_OMIT_AUTOVACUUM
  /* OP_Destroy stores an in integer r1. If this integer
  ** is non-zero, then it is the root page number of a table moved to
  ** location iTable. The following code modifies the sqlite_master table to
  ** reflect this.
................................................................................
  for(p=sqlite3BuiltinFunctions.a[h]; p; p=p->u.pHash){
    if( sqlite3StrICmp(p->zName, zFunc)==0 ){
      return p;
    }
  }
  return 0;
}
#ifdef SQLITE_ENABLE_NORMALIZE
SQLITE_PRIVATE FuncDef *sqlite3FunctionSearchN(
  int h,               /* Hash of the name */
  const char *zFunc,   /* Name of function */
  int nFunc            /* Length of the name */
){
  FuncDef *p;
  for(p=sqlite3BuiltinFunctions.a[h]; p; p=p->u.pHash){
    if( sqlite3StrNICmp(p->zName, zFunc, nFunc)==0 ){
      return p;
    }
  }
  return 0;
}
#endif /* SQLITE_ENABLE_NORMALIZE */

/*
** Insert a new FuncDef into a FuncDefHash hash table.
*/
SQLITE_PRIVATE void sqlite3InsertBuiltinFuncs(
  FuncDef *aDef,      /* List of global functions to be inserted */
  int nDef            /* Length of the apDef[] list */
){
  int i;
  for(i=0; i<nDef; i++){
    FuncDef *pOther;
    const char *zName = aDef[i].zName;
    int nName = sqlite3Strlen30(zName);
    int h = SQLITE_FUNC_HASH(zName[0], nName);
    assert( zName[0]>='a' && zName[0]<='z' );
    pOther = functionSearch(h, zName);
    if( pOther ){
      assert( pOther!=&aDef[i] && pOther->pNext!=&aDef[i] );
      aDef[i].pNext = pOther->pNext;
      pOther->pNext = &aDef[i];
    }else{
................................................................................
  ** install a new function.  Whatever FuncDef structure is returned it will
  ** have fields overwritten with new information appropriate for the
  ** new function.  But the FuncDefs for built-in functions are read-only.
  ** So we must not search for built-ins when creating a new function.
  */ 
  if( !createFlag && (pBest==0 || (db->mDbFlags & DBFLAG_PreferBuiltin)!=0) ){
    bestScore = 0;
    h = SQLITE_FUNC_HASH(sqlite3UpperToLower[(u8)zName[0]], nName);
    p = functionSearch(h, zName);
    while( p ){
      int score = matchQuality(p, nArg, enc);
      if( score>bestScore ){
        pBest = p;
        bestScore = score;
      }
................................................................................
    pTab->nTabRef++;
  }
  if( sqlite3IndexedByLookup(pParse, pItem) ){
    pTab = 0;
  }
  return pTab;
}

/* Return true if table pTab is read-only.
**
** A table is read-only if any of the following are true:
**
**   1) It is a virtual table and no implementation of the xUpdate method
**      has been provided
**
**   2) It is a system table (i.e. sqlite_master), this call is not
**      part of a nested parse and writable_schema pragma has not 
**      been specified
**
**   3) The table is a shadow table, the database connection is in
**      defensive mode, and the current sqlite3_prepare()
**      is for a top-level SQL statement.
*/
static int tabIsReadOnly(Parse *pParse, Table *pTab){
  sqlite3 *db;
  if( IsVirtual(pTab) ){
    return sqlite3GetVTable(pParse->db, pTab)->pMod->pModule->xUpdate==0;
  }
  if( (pTab->tabFlags & (TF_Readonly|TF_Shadow))==0 ) return 0;
  db = pParse->db;
  if( (pTab->tabFlags & TF_Readonly)!=0 ){
    return sqlite3WritableSchema(db)==0 && pParse->nested==0;
  }
  assert( pTab->tabFlags & TF_Shadow );
  return (db->flags & SQLITE_Defensive)!=0 
#ifndef SQLITE_OMIT_VIRTUALTABLE
          && db->pVtabCtx==0
#endif
          && db->nVdbeExec==0;
}

/*
** Check to make sure the given table is writable.  If it is not
** writable, generate an error message and return 1.  If it is
** writable return 0;
*/
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  if( tabIsReadOnly(pParse, pTab) ){















    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
    return 1;
  }

#ifndef SQLITE_OMIT_VIEW
  if( !viewOk && pTab->pSelect ){
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
  }
#endif
  return 0;
................................................................................
  sqlite3 *db,      /* The database connection */
  Table *pTab,      /* The table whose column is desired */
  int iCursor,      /* The open cursor on the table */
  i16 iCol          /* The column that is wanted */
){
  Expr *pExpr = sqlite3Expr(db, TK_COLUMN, 0);
  if( pExpr ){
    pExpr->y.pTab = pTab;
    pExpr->iTable = iCursor;
    pExpr->iColumn = iCol;
  }
  return pExpr;
}

/*
................................................................................
      zColAff[i] = pTab->aCol[i].affinity;
    }
    do{
      zColAff[i--] = 0;
    }while( i>=0 && zColAff[i]==SQLITE_AFF_BLOB );
    pTab->zColAff = zColAff;
  }
  assert( zColAff!=0 );
  i = sqlite3Strlen30NN(zColAff);
  if( i ){
    if( iReg ){
      sqlite3VdbeAddOp4(v, OP_Affinity, iReg, i, 0, zColAff, i);
    }else{
      sqlite3VdbeChangeP4(v, -1, zColAff, i);
    }
  }
................................................................................
 #undef pTrigger
#endif
#ifdef tmask
 #undef tmask
#endif

/*
** Meanings of bits in of pWalker->eCode for 
** sqlite3ExprReferencesUpdatedColumn()
*/
#define CKCNSTRNT_COLUMN   0x01    /* CHECK constraint uses a changing column */
#define CKCNSTRNT_ROWID    0x02    /* CHECK constraint references the ROWID */

/* This is the Walker callback from sqlite3ExprReferencesUpdatedColumn().
*  Set bit 0x01 of pWalker->eCode if pWalker->eCode to 0 and if this
** expression node references any of the
** columns that are being modifed by an UPDATE statement.
*/
static int checkConstraintExprNode(Walker *pWalker, Expr *pExpr){
  if( pExpr->op==TK_COLUMN ){
    assert( pExpr->iColumn>=0 || pExpr->iColumn==-1 );
    if( pExpr->iColumn>=0 ){
      if( pWalker->u.aiCol[pExpr->iColumn]>=0 ){
................................................................................
}

/*
** pExpr is a CHECK constraint on a row that is being UPDATE-ed.  The
** only columns that are modified by the UPDATE are those for which
** aiChng[i]>=0, and also the ROWID is modified if chngRowid is true.
**
** Return true if CHECK constraint pExpr uses any of the
** changing columns (or the rowid if it is changing).  In other words,
** return true if this CHECK constraint must be validated for
** the new row in the UPDATE statement.
**
** 2018-09-15: pExpr might also be an expression for an index-on-expressions.
** The operation of this routine is the same - return true if an only if
** the expression uses one or more of columns identified by the second and
** third arguments.
*/

SQLITE_PRIVATE int sqlite3ExprReferencesUpdatedColumn(
  Expr *pExpr,    /* The expression to be checked */
  int *aiChng,    /* aiChng[x]>=0 if column x changed by the UPDATE */
  int chngRowid   /* True if UPDATE changes the rowid */
){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 0;
  w.xExprCallback = checkConstraintExprNode;
  w.u.aiCol = aiChng;
  sqlite3WalkExpr(&w, pExpr);
  if( !chngRowid ){
................................................................................
    testcase( (w.eCode & CKCNSTRNT_ROWID)!=0 );
    w.eCode &= ~CKCNSTRNT_ROWID;
  }
  testcase( w.eCode==0 );
  testcase( w.eCode==CKCNSTRNT_COLUMN );
  testcase( w.eCode==CKCNSTRNT_ROWID );
  testcase( w.eCode==(CKCNSTRNT_ROWID|CKCNSTRNT_COLUMN) );
  return w.eCode!=0;
}

/*
** Generate code to do constraint checks prior to an INSERT or an UPDATE
** on table pTab.
**
** The regNewData parameter is the first register in a range that contains
................................................................................
  if( pTab->pCheck && (db->flags & SQLITE_IgnoreChecks)==0 ){
    ExprList *pCheck = pTab->pCheck;
    pParse->iSelfTab = -(regNewData+1);
    onError = overrideError!=OE_Default ? overrideError : OE_Abort;
    for(i=0; i<pCheck->nExpr; i++){
      int allOk;
      Expr *pExpr = pCheck->a[i].pExpr;
      if( aiChng
       && !sqlite3ExprReferencesUpdatedColumn(pExpr, aiChng, pkChng)
      ){
        /* The check constraints do not reference any of the columns being
        ** updated so there is no point it verifying the check constraint */
        continue;
      }
      allOk = sqlite3VdbeMakeLabel(v);
      sqlite3VdbeVerifyAbortable(v, onError);
      sqlite3ExprIfTrue(pParse, pExpr, allOk, SQLITE_JUMPIFNULL);
      if( onError==OE_Ignore ){
        sqlite3VdbeGoto(v, ignoreDest);
      }else{
        char *zName = pCheck->a[i].zName;
................................................................................
  void (*str_append)(sqlite3_str*, const char *zIn, int N);
  void (*str_appendall)(sqlite3_str*, const char *zIn);
  void (*str_appendchar)(sqlite3_str*, int N, char C);
  void (*str_reset)(sqlite3_str*);
  int (*str_errcode)(sqlite3_str*);
  int (*str_length)(sqlite3_str*);
  char *(*str_value)(sqlite3_str*);
  /* Version 3.25.0 and later */
  int (*create_window_function)(sqlite3*,const char*,int,int,void*,
                            void (*xStep)(sqlite3_context*,int,sqlite3_value**),
                            void (*xFinal)(sqlite3_context*),
                            void (*xValue)(sqlite3_context*),
                            void (*xInv)(sqlite3_context*,int,sqlite3_value**),
                            void(*xDestroy)(void*));
  /* Version 3.26.0 and later */
  const char *(*normalized_sql)(sqlite3_stmt*);
};

/*
** This is the function signature used for all extension entry points.  It
** is also defined in the file "loadext.c".
*/
typedef int (*sqlite3_loadext_entry)(
................................................................................
#define sqlite3_str_appendchar         sqlite3_api->str_appendchar
#define sqlite3_str_reset              sqlite3_api->str_reset
#define sqlite3_str_errcode            sqlite3_api->str_errcode
#define sqlite3_str_length             sqlite3_api->str_length
#define sqlite3_str_value              sqlite3_api->str_value
/* Version 3.25.0 and later */
#define sqlite3_create_window_function sqlite3_api->create_window_function
/* Version 3.26.0 and later */
#define sqlite3_normalized_sql         sqlite3_api->normalized_sql
#endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */

#if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
  /* This case when the file really is being compiled as a loadable 
  ** extension */
# define SQLITE_EXTENSION_INIT1     const sqlite3_api_routines *sqlite3_api=0;
# define SQLITE_EXTENSION_INIT2(v)  sqlite3_api=v;
................................................................................

#ifdef SQLITE_OMIT_VIRTUALTABLE
# define sqlite3_create_module 0
# define sqlite3_create_module_v2 0
# define sqlite3_declare_vtab 0
# define sqlite3_vtab_config 0
# define sqlite3_vtab_on_conflict 0
# define sqlite3_vtab_collation 0
#endif

#ifdef SQLITE_OMIT_SHARED_CACHE
# define sqlite3_enable_shared_cache 0
#endif

#if defined(SQLITE_OMIT_TRACE) || defined(SQLITE_OMIT_DEPRECATED)
................................................................................
  sqlite3_str_appendall,
  sqlite3_str_appendchar,
  sqlite3_str_reset,
  sqlite3_str_errcode,
  sqlite3_str_length,
  sqlite3_str_value,
  /* Version 3.25.0 and later */
  sqlite3_create_window_function,
  /* Version 3.26.0 and later */
#ifdef SQLITE_ENABLE_NORMALIZE
  sqlite3_normalized_sql
#else
  0
#endif
};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.
................................................................................
#define PragTyp_TEMP_STORE_DIRECTORY          36
#define PragTyp_THREADS                       37
#define PragTyp_WAL_AUTOCHECKPOINT            38
#define PragTyp_WAL_CHECKPOINT                39
#define PragTyp_ACTIVATE_EXTENSIONS           40
#define PragTyp_HEXKEY                        41
#define PragTyp_KEY                           42

#define PragTyp_LOCK_STATUS                   43
#define PragTyp_PARSER_TRACE                  44
#define PragTyp_STATS                         45

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_ReadOnly   0x08 /* Read-only HEADER_VALUE */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
................................................................................
#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */

/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "id",          /* Used by: foreign_key_list */
  /*   1 */ "seq",        
  /*   2 */ "table",      
  /*   3 */ "from",       
  /*   4 */ "to",         
  /*   5 */ "on_update",  
  /*   6 */ "on_delete",  
  /*   7 */ "match",      
  /*   8 */ "cid",         /* Used by: table_xinfo */
  /*   9 */ "name",       
  /*  10 */ "type",       
  /*  11 */ "notnull",    
  /*  12 */ "dflt_value", 
  /*  13 */ "pk",         
  /*  14 */ "hidden",     
                           /* table_info reuses 8 */
  /*  15 */ "seqno",       /* Used by: index_xinfo */
  /*  16 */ "cid",        
  /*  17 */ "name",       
  /*  18 */ "desc",       
  /*  19 */ "coll",       
  /*  20 */ "key",        
  /*  21 */ "tbl",         /* Used by: stats */
  /*  22 */ "idx",        
  /*  23 */ "wdth",       
  /*  24 */ "hght",       
  /*  25 */ "flgs",       
  /*  26 */ "seq",         /* Used by: index_list */
  /*  27 */ "name",       
  /*  28 */ "unique",     
  /*  29 */ "origin",     
  /*  30 */ "partial",    
  /*  31 */ "table",       /* Used by: foreign_key_check */
  /*  32 */ "rowid",      
  /*  33 */ "parent",     
  /*  34 */ "fkid",       
                           /* index_info reuses 15 */
  /*  35 */ "seq",         /* Used by: database_list */
  /*  36 */ "name",       
  /*  37 */ "file",       

  /*  38 */ "busy",        /* Used by: wal_checkpoint */
  /*  39 */ "log",        
  /*  40 */ "checkpointed",

  /*  41 */ "name",        /* Used by: function_list */
  /*  42 */ "builtin",    
                           /* collation_list reuses 26 */
  /*  43 */ "database",    /* Used by: lock_status */
  /*  44 */ "status",     


  /*  45 */ "cache_size",  /* Used by: default_cache_size */
                           /* module_list pragma_list reuses 9 */
  /*  46 */ "timeout",     /* Used by: busy_timeout */


};

/* Definitions of all built-in pragmas */
typedef struct PragmaName {
  const char *const zName; /* Name of pragma */
  u8 ePragTyp;             /* PragTyp_XXX value */
  u8 mPragFlg;             /* Zero or more PragFlg_XXX values */
  u8 iPragCName;           /* Start of column names in pragCName[] */
  u8 nPragCName;           /* Num of col names. 0 means use pragma name */
  u64 iArg;                /* Extra argument */
} PragmaName;
static const PragmaName aPragmaName[] = {
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
 {/* zName:     */ "activate_extensions",
  /* ePragTyp:  */ PragTyp_ACTIVATE_EXTENSIONS,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_AutoIndex },
#endif
#endif
 {/* zName:     */ "busy_timeout",
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 46, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CkptFullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "collation_list",
  /* ePragTyp:  */ PragTyp_COLLATION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 26, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 31, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 0, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
................................................................................
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "function_list",
  /* ePragTyp:  */ PragTyp_FUNCTION_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 41, 2,
  /* iArg:      */ 0 },
#endif
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "hexkey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 2 },
 {/* zName:     */ "hexrekey",
  /* ePragTyp:  */ PragTyp_HEXKEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 3 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_CHECK)
 {/* zName:     */ "ignore_check_constraints",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 3,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_list",
  /* ePragTyp:  */ PragTyp_INDEX_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 26, 5,
  /* iArg:      */ 0 },
 {/* zName:     */ "index_xinfo",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
 {/* zName:     */ "lock_status",
  /* ePragTyp:  */ PragTyp_LOCK_STATUS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 43, 2,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
................................................................................
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
#if !defined(SQLITE_OMIT_VIRTUALTABLE)
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "module_list",
  /* ePragTyp:  */ PragTyp_MODULE_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
#endif
#endif
#endif
 {/* zName:     */ "optimize",
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "query_only",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
................................................................................
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_RecTriggers },
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "rekey",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 1 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "reverse_unordered_selects",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ReverseOrder },
................................................................................
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 8, 6,
  /* iArg:      */ 0 },
 {/* zName:     */ "table_xinfo",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 8, 7,
  /* iArg:      */ 1 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "temp_store_directory",
  /* ePragTyp:  */ PragTyp_TEMP_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "textkey",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 4 },
 {/* zName:     */ "textrekey",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 5 },
#endif
 {/* zName:     */ "threads",
  /* ePragTyp:  */ PragTyp_THREADS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
................................................................................
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 38, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema|SQLITE_NoSchemaError },
#endif
};
/* Number of pragmas: 62 on by default, 81 total. */

/************** End of pragma.h **********************************************/
/************** Continuing where we left off in pragma.c *********************/

/*
** Interpret the given string as a safety level.  Return 0 for OFF,
** 1 for ON or NORMAL, 2 for FULL, and 3 for EXTRA.  Return 1 for an empty or 
................................................................................

#ifndef SQLITE_OMIT_FLAG_PRAGMAS
  case PragTyp_FLAG: {
    if( zRight==0 ){
      setPragmaResultColumnNames(v, pPragma);
      returnSingleInt(v, (db->flags & pPragma->iArg)!=0 );
    }else{
      u64 mask = pPragma->iArg;    /* Mask of bits to set or clear. */
      if( db->autoCommit==0 ){
        /* Foreign key support may not be enabled or disabled while not
        ** in auto-commit mode.  */
        mask &= ~(SQLITE_ForeignKeys);
      }
#if SQLITE_USER_AUTHENTICATION
      if( db->auth.authLevel==UAUTH_User ){
................................................................................
  ** dflt_value: The default value for the column, if any.
  ** pk:         Non-zero for PK fields.
  */
  case PragTyp_TABLE_INFO: if( zRight ){
    Table *pTab;
    pTab = sqlite3LocateTable(pParse, LOCATE_NOERR, zRight, zDb);
    if( pTab ){
      int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
      int i, k;
      int nHidden = 0;
      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 7;
      sqlite3CodeVerifySchema(pParse, iTabDb);
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        int isHidden = IsHiddenColumn(pCol);
        if( isHidden && pPragma->iArg==0 ){
          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );
        sqlite3VdbeMultiLoad(v, 1, pPragma->iArg ? "issisii" : "issisi",
               i-nHidden,
               pCol->zName,
               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k,
               isHidden);
      }
    }
  }
  break;

#ifdef SQLITE_DEBUG
  case PragTyp_STATS: {
................................................................................
#endif

  case PragTyp_INDEX_INFO: if( zRight ){
    Index *pIdx;
    Table *pTab;
    pIdx = sqlite3FindIndex(db, zRight, zDb);
    if( pIdx ){
      int iIdxDb = sqlite3SchemaToIndex(db, pIdx->pSchema);
      int i;
      int mx;
      if( pPragma->iArg ){
        /* PRAGMA index_xinfo (newer version with more rows and columns) */
        mx = pIdx->nColumn;
        pParse->nMem = 6;
      }else{
        /* PRAGMA index_info (legacy version) */
        mx = pIdx->nKeyCol;
        pParse->nMem = 3;
      }
      pTab = pIdx->pTable;
      sqlite3CodeVerifySchema(pParse, iIdxDb);
      assert( pParse->nMem<=pPragma->nPragCName );
      for(i=0; i<mx; i++){
        i16 cnum = pIdx->aiColumn[i];
        sqlite3VdbeMultiLoad(v, 1, "iisX", i, cnum,
                             cnum<0 ? 0 : pTab->aCol[cnum].zName);
        if( pPragma->iArg ){
          sqlite3VdbeMultiLoad(v, 4, "isiX",
................................................................................

  case PragTyp_INDEX_LIST: if( zRight ){
    Index *pIdx;
    Table *pTab;
    int i;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
      pParse->nMem = 5;
      sqlite3CodeVerifySchema(pParse, iTabDb);
      for(pIdx=pTab->pIndex, i=0; pIdx; pIdx=pIdx->pNext, i++){
        const char *azOrigin[] = { "c", "u", "pk" };
        sqlite3VdbeMultiLoad(v, 1, "isisi",
           i,
           pIdx->zName,
           IsUniqueIndex(pIdx),
           azOrigin[pIdx->idxType],
................................................................................
  case PragTyp_FUNCTION_LIST: {
    int i;
    HashElem *j;
    FuncDef *p;
    pParse->nMem = 2;
    for(i=0; i<SQLITE_FUNC_HASH_SZ; i++){
      for(p=sqlite3BuiltinFunctions.a[i]; p; p=p->u.pHash ){
        if( p->funcFlags & SQLITE_FUNC_INTERNAL ) continue;
        sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 1);
      }
    }
    for(j=sqliteHashFirst(&db->aFunc); j; j=sqliteHashNext(j)){
      p = (FuncDef*)sqliteHashData(j);
      sqlite3VdbeMultiLoad(v, 1, "si", p->zName, 0);
    }
................................................................................
  case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
    FKey *pFK;
    Table *pTab;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      pFK = pTab->pFKey;
      if( pFK ){
        int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
        int i = 0; 
        pParse->nMem = 8;
        sqlite3CodeVerifySchema(pParse, iTabDb);
        while(pFK){
          int j;
          for(j=0; j<pFK->nCol; j++){
            sqlite3VdbeMultiLoad(v, 1, "iissssss",
                   i,
                   j,
                   pFK->zTo,
................................................................................
    int addrOk;            /* Jump here if the key is OK */
    int *aiCols;           /* child to parent column mapping */

    regResult = pParse->nMem+1;
    pParse->nMem += 4;
    regKey = ++pParse->nMem;
    regRow = ++pParse->nMem;

    k = sqliteHashFirst(&db->aDb[iDb].pSchema->tblHash);
    while( k ){
      int iTabDb;
      if( zRight ){
        pTab = sqlite3LocateTable(pParse, 0, zRight, zDb);
        k = 0;
      }else{
        pTab = (Table*)sqliteHashData(k);
        k = sqliteHashNext(k);
      }
      if( pTab==0 || pTab->pFKey==0 ) continue;
      iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
      sqlite3CodeVerifySchema(pParse, iTabDb);
      sqlite3TableLock(pParse, iTabDb, pTab->tnum, 0, pTab->zName);
      if( pTab->nCol+regRow>pParse->nMem ) pParse->nMem = pTab->nCol + regRow;
      sqlite3OpenTable(pParse, 0, iTabDb, pTab, OP_OpenRead);
      sqlite3VdbeLoadString(v, regResult, pTab->zName);
      for(i=1, pFK=pTab->pFKey; pFK; i++, pFK=pFK->pNextFrom){
        pParent = sqlite3FindTable(db, pFK->zTo, zDb);
        if( pParent==0 ) continue;
        pIdx = 0;
        sqlite3TableLock(pParse, iTabDb, pParent->tnum, 0, pParent->zName);
        x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, 0);
        if( x==0 ){
          if( pIdx==0 ){
            sqlite3OpenTable(pParse, i, iTabDb, pParent, OP_OpenRead);
          }else{
            sqlite3VdbeAddOp3(v, OP_OpenRead, i, pIdx->tnum, iTabDb);
            sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
          }
        }else{
          k = 0;
          break;
        }
      }
................................................................................
      sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zDbSName, zState);
    }
    break;
  }
#endif

#ifdef SQLITE_HAS_CODEC
  /* Pragma        iArg
  ** ----------   ------
  **  key           0
  **  rekey         1
  **  hexkey        2
  **  hexrekey      3
  **  textkey       4
  **  textrekey     5
  */
  case PragTyp_KEY: {
    if( zRight ){
      int n = pPragma->iArg<4 ? sqlite3Strlen30(zRight) : -1;
      if( (pPragma->iArg & 1)==0 ){
        sqlite3_key_v2(db, zDb, zRight, n);

      }else{
        sqlite3_rekey_v2(db, zDb, zRight, n);
      }


    }
    break;
  }
  case PragTyp_HEXKEY: {
    if( zRight ){
      u8 iByte;
      int i;
      char zKey[40];
      for(i=0, iByte=0; i<sizeof(zKey)*2 && sqlite3Isxdigit(zRight[i]); i++){
        iByte = (iByte<<4) + sqlite3HexToInt(zRight[i]);
        if( (i&1)!=0 ) zKey[i/2] = iByte;
      }
      if( (pPragma->iArg & 1)==0 ){
        sqlite3_key_v2(db, zDb, zKey, i/2);
      }else{
        sqlite3_rekey_v2(db, zDb, zKey, i/2);
      }
    }
    break;
  }
................................................................................
  0,                           /* xSync - sync transaction */
  0,                           /* xCommit - commit transaction */
  0,                           /* xRollback - rollback transaction */
  0,                           /* xFindFunction - function overloading */
  0,                           /* xRename - rename the table */
  0,                           /* xSavepoint */
  0,                           /* xRelease */
  0,                           /* xRollbackTo */
  0                            /* xShadowName */
};

/*
** Check to see if zTabName is really the name of a pragma.  If it is,
** then register an eponymous virtual table for that pragma and return
** a pointer to the Module object for the new virtual table.
*/
................................................................................
    }
#endif
  }
  if( db->mallocFailed ){
    rc = SQLITE_NOMEM_BKPT;
    sqlite3ResetAllSchemasOfConnection(db);
  }
  if( rc==SQLITE_OK || (db->flags&SQLITE_NoSchemaError)){
    /* Black magic: If the SQLITE_NoSchemaError flag is set, then consider
    ** the schema loaded, even if errors occurred. In this situation the 
    ** current sqlite3_prepare() operation will fail, but the following one
    ** will attempt to compile the supplied statement against whatever subset
    ** of the schema was loaded before the error occurred. The primary
    ** purpose of this is to allow access to the sqlite_master table
    ** even when its contents have been corrupted.
    */
................................................................................
  sqlite3BtreeLeaveAll(db);
  rc = sqlite3ApiExit(db, rc);
  assert( (rc&db->errMask)==rc );
  sqlite3_mutex_leave(db->mutex);
  return rc;
}

#ifdef SQLITE_ENABLE_NORMALIZE
/*
** Checks if the specified token is a table, column, or function name,
** based on the databases associated with the statement being prepared.
** If the function fails, zero is returned and pRc is filled with the
** error code.
*/
static int shouldTreatAsIdentifier(
  sqlite3 *db,        /* Database handle. */
  const char *zToken, /* Pointer to start of token to be checked */
  int nToken,         /* Length of token to be checked */
  int *pRc            /* Pointer to error code upon failure */
){
  int bFound = 0;     /* Non-zero if token is an identifier name. */
  int i, j;           /* Database and column loop indexes. */
  Schema *pSchema;    /* Schema for current database. */
  Hash *pHash;        /* Hash table of tables for current database. */
  HashElem *e;        /* Hash element for hash table iteration. */
  Table *pTab;        /* Database table for columns being checked. */

  if( sqlite3IsRowidN(zToken, nToken) ){
    return 1;
  }
  if( nToken>0 ){
    int hash = SQLITE_FUNC_HASH(sqlite3UpperToLower[(u8)zToken[0]], nToken);
    if( sqlite3FunctionSearchN(hash, zToken, nToken) ) return 1;
  }
  assert( db!=0 );
  sqlite3_mutex_enter(db->mutex);
  sqlite3BtreeEnterAll(db);
  for(i=0; i<db->nDb; i++){
    pHash = &db->aFunc;
    if( sqlite3HashFindN(pHash, zToken, nToken) ){
      bFound = 1;
      break;
    }
    pSchema = db->aDb[i].pSchema;
    if( pSchema==0 ) continue;
    pHash = &pSchema->tblHash;
    if( sqlite3HashFindN(pHash, zToken, nToken) ){
      bFound = 1;
      break;
    }
    for(e=sqliteHashFirst(pHash); e; e=sqliteHashNext(e)){
      pTab = sqliteHashData(e);
      if( pTab==0 ) continue;
      pHash = pTab->pColHash;
      if( pHash==0 ){
        pTab->pColHash = pHash = sqlite3_malloc(sizeof(Hash));
        if( pHash ){
          sqlite3HashInit(pHash);
          for(j=0; j<pTab->nCol; j++){
            Column *pCol = &pTab->aCol[j];
            sqlite3HashInsert(pHash, pCol->zName, pCol);
          }
        }else{
          *pRc = SQLITE_NOMEM_BKPT;
          bFound = 0;
          goto done;
        }
      }
      if( pHash && sqlite3HashFindN(pHash, zToken, nToken) ){
        bFound = 1;
        goto done;
      }
    }
  }
done:
  sqlite3BtreeLeaveAll(db);
  sqlite3_mutex_leave(db->mutex);
  return bFound;
}

/*
** Attempt to estimate the final output buffer size needed for the fully
** normalized version of the specified SQL string.  This should take into
** account any potential expansion that could occur (e.g. via IN clauses
** being expanded, etc).  This size returned is the total number of bytes
** including the NUL terminator.
*/
static int estimateNormalizedSize(
  const char *zSql, /* The original SQL string */
  int nSql,         /* Length of original SQL string */
  u8 prepFlags      /* The flags passed to sqlite3_prepare_v3() */
){
  int nOut = nSql + 4;
  const char *z = zSql;
  while( nOut<nSql*5 ){
    while( z[0]!=0 && z[0]!='I' && z[0]!='i' ){ z++; }
    if( z[0]==0 ) break;
    z++;
    if( z[0]!='N' && z[0]!='n' ) break;
    z++;
    while( sqlite3Isspace(z[0]) ){ z++; }
    if( z[0]!='(' ) break;
    z++;
    nOut += 5; /* ?,?,? */
  }
  return nOut;
}

/*
** Copy the current token into the output buffer while dealing with quoted
** identifiers.  By default, all letters will be converted into lowercase.
** If the bUpper flag is set, uppercase will be used.  The piOut argument
** will be used to update the target index into the output string.
*/
static void copyNormalizedToken(
  const char *zSql, /* The original SQL string */
  int iIn,          /* Current index into the original SQL string */
  int nToken,       /* Number of bytes in the current token */
  int tokenFlags,   /* Flags returned by the tokenizer */
  char *zOut,       /* The output string */
  int *piOut        /* Pointer to target index into the output string */
){
  int bQuoted = tokenFlags & SQLITE_TOKEN_QUOTED;
  int bKeyword = tokenFlags & SQLITE_TOKEN_KEYWORD;
  int j = *piOut, k = 0;
  for(; k<nToken; k++){
    if( bQuoted ){
      if( k==0 && iIn>0 ){
        zOut[j++] = '"';
        continue;
      }else if( k==nToken-1 ){
        zOut[j++] = '"';
        continue;
      }
    }
    if( bKeyword ){
      zOut[j++] = sqlite3Toupper(zSql[iIn+k]);
    }else{
      zOut[j++] = sqlite3Tolower(zSql[iIn+k]);
    }
  }
  *piOut = j;
}

/*
** Perform normalization of the SQL contained in the prepared statement and
** store the result in the zNormSql field.  The schema for the associated
** databases are consulted while performing the normalization in order to
** determine if a token appears to be an identifier.  All identifiers are
** left intact in the normalized SQL and all literals are replaced with a
** single '?'.
*/
SQLITE_PRIVATE void sqlite3Normalize(
  Vdbe *pVdbe,      /* VM being reprepared */
  const char *zSql, /* The original SQL string */
  int nSql,         /* Size of the input string in bytes */
  u8 prepFlags      /* The flags passed to sqlite3_prepare_v3() */
){
  sqlite3 *db;           /* Database handle. */
  char *z;               /* The output string */
  int nZ;                /* Size of the output string in bytes */
  int i;                 /* Next character to read from zSql[] */
  int j;                 /* Next character to fill in on z[] */
  int tokenType = 0;     /* Type of the next token */
  int prevTokenType = 0; /* Type of the previous token, except spaces */
  int n;                 /* Size of the next token */
  int nParen = 0;        /* Nesting level of parenthesis */
  Hash inHash;           /* Table of parenthesis levels to output index. */

  db = sqlite3VdbeDb(pVdbe);
  assert( db!=0 );
  assert( pVdbe->zNormSql==0 );
  if( zSql==0 ) return;
  nZ = estimateNormalizedSize(zSql, nSql, prepFlags);
  z = sqlite3DbMallocRawNN(db, nZ);
  if( z==0 ) return;
  sqlite3HashInit(&inHash);
  for(i=j=0; i<nSql && zSql[i]; i+=n){
    int flags = 0;
    if( tokenType!=TK_SPACE ) prevTokenType = tokenType;
    n = sqlite3GetTokenNormalized((unsigned char*)zSql+i, &tokenType, &flags);
    switch( tokenType ){
      case TK_SPACE: {
        break;
      }
      case TK_ILLEGAL: {
        sqlite3DbFree(db, z);
        sqlite3HashClear(&inHash);
        return;
      }
      case TK_STRING:
      case TK_INTEGER:
      case TK_FLOAT:
      case TK_VARIABLE:
      case TK_BLOB: {
        z[j++] = '?';
        break;
      }
      case TK_LP:
      case TK_RP: {
        if( tokenType==TK_LP ){
          nParen++;
          if( prevTokenType==TK_IN ){
            assert( nParen<nSql );
            sqlite3HashInsert(&inHash, zSql+nParen, SQLITE_INT_TO_PTR(j));
          }
        }else{
          int jj;
          assert( nParen<nSql );
          jj = SQLITE_PTR_TO_INT(sqlite3HashFind(&inHash, zSql+nParen));
          if( jj>0 ){
            sqlite3HashInsert(&inHash, zSql+nParen, 0);
            assert( jj+6<nZ );
            memcpy(z+jj+1, "?,?,?", 5);
            j = jj+6;
            assert( nZ-1-j>=0 );
            assert( nZ-1-j<nZ );
            memset(z+j, 0, nZ-1-j);
          }
          nParen--;
        }
        assert( nParen>=0 );
        /* Fall through */
      }
      case TK_MINUS:
      case TK_SEMI:
      case TK_PLUS:
      case TK_STAR:
      case TK_SLASH:
      case TK_REM:
      case TK_EQ:
      case TK_LE:
      case TK_NE:
      case TK_LSHIFT:
      case TK_LT:
      case TK_RSHIFT:
      case TK_GT:
      case TK_GE:
      case TK_BITOR:
      case TK_CONCAT:
      case TK_COMMA:
      case TK_BITAND:
      case TK_BITNOT:
      case TK_DOT:
      case TK_IN:
      case TK_IS:
      case TK_NOT:
      case TK_NULL:
      case TK_ID: {
        if( tokenType==TK_NULL ){
          if( prevTokenType==TK_IS || prevTokenType==TK_NOT ){
            /* NULL is a keyword in this case, not a literal value */
          }else{
            /* Here the NULL is a literal value */
            z[j++] = '?';
            break;
          }
        }
        if( j>0 && sqlite3IsIdChar(z[j-1]) && sqlite3IsIdChar(zSql[i]) ){
          z[j++] = ' ';
        }
        if( tokenType==TK_ID ){
          int i2 = i, n2 = n, rc = SQLITE_OK;
          if( nParen>0 ){
            assert( nParen<nSql );
            sqlite3HashInsert(&inHash, zSql+nParen, 0);
          }
          if( flags&SQLITE_TOKEN_QUOTED ){ i2++; n2-=2; }
          if( shouldTreatAsIdentifier(db, zSql+i2, n2, &rc)==0 ){
            if( rc!=SQLITE_OK ){
              sqlite3DbFree(db, z);
              sqlite3HashClear(&inHash);
              return;
            }
            if( sqlite3_keyword_check(zSql+i2, n2)==0 ){
              z[j++] = '?';
              break;
            }
          }
        }
        copyNormalizedToken(zSql, i, n, flags, z, &j);
        break;
      }
    }
  }
  assert( j<nZ && "one" );
  while( j>0 && z[j-1]==' ' ){ j--; }
  if( j>0 && z[j-1]!=';' ){ z[j++] = ';'; }
  z[j] = 0;
  assert( j<nZ && "two" );
  pVdbe->zNormSql = z;
  sqlite3HashClear(&inHash);
}
#endif /* SQLITE_ENABLE_NORMALIZE */

/*
** Rerun the compilation of a statement after a schema change.
**
** If the statement is successfully recompiled, return SQLITE_OK. Otherwise,
** if the statement cannot be recompiled because another connection has
** locked the sqlite3_master table, return SQLITE_LOCKED. If any other error
** occurs, return SQLITE_SCHEMA.
................................................................................
  int i;
  int nDefer = 0;
  ExprList *pExtra = 0;
  for(i=0; i<pEList->nExpr; i++){
    struct ExprList_item *pItem = &pEList->a[i];
    if( pItem->u.x.iOrderByCol==0 ){
      Expr *pExpr = pItem->pExpr;
      Table *pTab = pExpr->y.pTab;
      if( pExpr->op==TK_COLUMN && pExpr->iColumn>=0 && pTab && !IsVirtual(pTab)
       && (pTab->aCol[pExpr->iColumn].colFlags & COLFLAG_SORTERREF)
      ){
        int j;
        for(j=0; j<nDefer; j++){
          if( pSort->aDefer[j].iCsr==pExpr->iTable ) break;
        }
................................................................................
              pPk = sqlite3PrimaryKeyIndex(pTab);
              nKey = pPk->nKeyCol;
            }
            for(k=0; k<nKey; k++){
              Expr *pNew = sqlite3PExpr(pParse, TK_COLUMN, 0, 0);
              if( pNew ){
                pNew->iTable = pExpr->iTable;
                pNew->y.pTab = pExpr->y.pTab;
                pNew->iColumn = pPk ? pPk->aiColumn[k] : -1;
                pExtra = sqlite3ExprListAppend(pParse, pExtra, pNew);
              }
            }
            pSort->aDefer[nDefer].pTab = pExpr->y.pTab;
            pSort->aDefer[nDefer].iCsr = pExpr->iTable;
            pSort->aDefer[nDefer].nKey = nKey;
            nDefer++;
          }
        }
        pItem->bSorterRef = 1;
      }
................................................................................
        ** This is not a problem, as the column type of "t1.col" is never
        ** used. When columnType() is called on the expression 
        ** "(SELECT t1.col)", the correct type is returned (see the TK_SELECT
        ** branch below.  */
        break;
      }

      assert( pTab && pExpr->y.pTab==pTab );
      if( pS ){
        /* The "table" is actually a sub-select or a view in the FROM clause
        ** of the SELECT statement. Return the declaration type and origin
        ** data for the result-set column of the sub-select.
        */
        if( iCol>=0 && iCol<pS->pEList->nExpr ){
          /* If iCol is less than zero, then the expression requests the
................................................................................
  srcName = (db->flags & SQLITE_ShortColNames)!=0 || fullName;
  sqlite3VdbeSetNumCols(v, pEList->nExpr);
  for(i=0; i<pEList->nExpr; i++){
    Expr *p = pEList->a[i].pExpr;

    assert( p!=0 );
    assert( p->op!=TK_AGG_COLUMN );  /* Agg processing has not run yet */
    assert( p->op!=TK_COLUMN || p->y.pTab!=0 ); /* Covering idx not yet coded */
    if( pEList->a[i].zName ){
      /* An AS clause always takes first priority */
      char *zName = pEList->a[i].zName;
      sqlite3VdbeSetColName(v, i, COLNAME_NAME, zName, SQLITE_TRANSIENT);
    }else if( srcName && p->op==TK_COLUMN ){
      char *zCol;
      int iCol = p->iColumn;
      pTab = p->y.pTab;
      assert( pTab!=0 );
      if( iCol<0 ) iCol = pTab->iPKey;
      assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
      if( iCol<0 ){
        zCol = "rowid";
      }else{
        zCol = pTab->aCol[iCol].zName;
................................................................................
        pColExpr = pColExpr->pRight;
        assert( pColExpr!=0 );
      }
      assert( pColExpr->op!=TK_AGG_COLUMN );
      if( pColExpr->op==TK_COLUMN ){
        /* For columns use the column name name */
        int iCol = pColExpr->iColumn;
        Table *pTab = pColExpr->y.pTab;
        assert( pTab!=0 );
        if( iCol<0 ) iCol = pTab->iPKey;
        zName = iCol>=0 ? pTab->aCol[iCol].zName : "rowid";
      }else if( pColExpr->op==TK_ID ){
        assert( !ExprHasProperty(pColExpr, EP_IntValue) );
        zName = pColExpr->u.zToken;
      }else{
................................................................................
  }
#ifndef SQLITE_OMIT_FLOATING_POINT
  if( pTab->aCol[i].affinity==SQLITE_AFF_REAL ){
    sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
  }
#endif
}

/*
** Check to see if column iCol of index pIdx references any of the
** columns defined by aXRef and chngRowid.  Return true if it does
** and false if not.  This is an optimization.  False-positives are a
** performance degradation, but false-negatives can result in a corrupt
** index and incorrect answers.
**
** aXRef[j] will be non-negative if column j of the original table is
** being updated.  chngRowid will be true if the rowid of the table is
** being updated.
*/
static int indexColumnIsBeingUpdated(
  Index *pIdx,      /* The index to check */
  int iCol,         /* Which column of the index to check */
  int *aXRef,       /* aXRef[j]>=0 if column j is being updated */
  int chngRowid     /* true if the rowid is being updated */
){
  i16 iIdxCol = pIdx->aiColumn[iCol];
  assert( iIdxCol!=XN_ROWID ); /* Cannot index rowid */
  if( iIdxCol>=0 ){
    return aXRef[iIdxCol]>=0;
  }
  assert( iIdxCol==XN_EXPR );
  assert( pIdx->aColExpr!=0 );
  assert( pIdx->aColExpr->a[iCol].pExpr!=0 );
  return sqlite3ExprReferencesUpdatedColumn(pIdx->aColExpr->a[iCol].pExpr,
                                            aXRef,chngRowid);
}

/*
** Check to see if index pIdx is a partial index whose conditional
** expression might change values due to an UPDATE.  Return true if
** the index is subject to change and false if the index is guaranteed
** to be unchanged.  This is an optimization.  False-positives are a
** performance degradation, but false-negatives can result in a corrupt
** index and incorrect answers.
**
** aXRef[j] will be non-negative if column j of the original table is
** being updated.  chngRowid will be true if the rowid of the table is
** being updated.
*/
static int indexWhereClauseMightChange(
  Index *pIdx,      /* The index to check */
  int *aXRef,       /* aXRef[j]>=0 if column j is being updated */
  int chngRowid     /* true if the rowid is being updated */
){
  if( pIdx->pPartIdxWhere==0 ) return 0;
  return sqlite3ExprReferencesUpdatedColumn(pIdx->pPartIdxWhere,
                                            aXRef, chngRowid);
}

/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
**          \_______/ \________/     \______/       \________________/
*            onError   pTabList      pChanges             pWhere
................................................................................
  pTabList->a[0].colUsed = IsVirtual(pTab) ? ALLBITS : 0;

  hasFK = sqlite3FkRequired(pParse, pTab, aXRef, chngKey);

  /* There is one entry in the aRegIdx[] array for each index on the table
  ** being updated.  Fill in aRegIdx[] with a register number that will hold
  ** the key for accessing each index.


  */
  for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
    int reg;
    if( chngKey || hasFK>1 || pIdx==pPk
     || indexWhereClauseMightChange(pIdx,aXRef,chngRowid)
    ){
      reg = ++pParse->nMem;
      pParse->nMem += pIdx->nColumn;
    }else{
      reg = 0;
      for(i=0; i<pIdx->nKeyCol; i++){
        if( indexColumnIsBeingUpdated(pIdx, i, aXRef, chngRowid) ){

          reg = ++pParse->nMem;
          pParse->nMem += pIdx->nColumn;
          if( (onError==OE_Replace)
           || (onError==OE_Default && pIdx->onError==OE_Replace) 
          ){
            bReplace = 1;
          }
................................................................................
  saved_flags = db->flags;
  saved_mDbFlags = db->mDbFlags;
  saved_nChange = db->nChange;
  saved_nTotalChange = db->nTotalChange;
  saved_mTrace = db->mTrace;
  db->flags |= SQLITE_WriteSchema | SQLITE_IgnoreChecks;
  db->mDbFlags |= DBFLAG_PreferBuiltin | DBFLAG_Vacuum;
  db->flags &= ~(SQLITE_ForeignKeys | SQLITE_ReverseOrder
                   | SQLITE_Defensive | SQLITE_CountRows);
  db->mTrace = 0;

  zDbMain = db->aDb[iDb].zDbSName;
  pMain = db->aDb[iDb].pBt;
  isMemDb = sqlite3PagerIsMemdb(sqlite3BtreePager(pMain));

  /* Attach the temporary database as 'vacuum_db'. The synchronous pragma
................................................................................
SQLITE_PRIVATE void sqlite3VtabBeginParse(
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName,   /* Name of the module for the virtual table */
  int ifNotExists       /* No error if the table already exists */
){

  Table *pTable;        /* The new virtual table */
  sqlite3 *db;          /* Database connection */

  sqlite3StartTable(pParse, pName1, pName2, 0, 0, 1, ifNotExists);
  pTable = pParse->pNewTable;
  if( pTable==0 ) return;
  assert( 0==pTable->pIndex );

  db = pParse->db;



  assert( pTable->nModuleArg==0 );
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));
  assert( (pParse->sNameToken.z==pName2->z && pName2->z!=0)
       || (pParse->sNameToken.z==pName1->z && pName2->z==0)
................................................................................
#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */
  if( pTable->azModuleArg ){
    int iDb = sqlite3SchemaToIndex(db, pTable->pSchema);
    assert( iDb>=0 ); /* The database the table is being created in */
    sqlite3AuthCheck(pParse, SQLITE_CREATE_VTABLE, pTable->zName, 
            pTable->azModuleArg[0], pParse->db->aDb[iDb].zDbSName);
  }
#endif
}

/*
................................................................................
  void *pArg = 0;
  FuncDef *pNew;
  int rc = 0;

  /* Check to see the left operand is a column in a virtual table */
  if( NEVER(pExpr==0) ) return pDef;
  if( pExpr->op!=TK_COLUMN ) return pDef;
  pTab = pExpr->y.pTab;
  if( pTab==0 ) return pDef;
  if( !IsVirtual(pTab) ) return pDef;
  pVtab = sqlite3GetVTable(db, pTab)->pVtab;
  assert( pVtab!=0 );
  assert( pVtab->pModule!=0 );
  pMod = (sqlite3_module *)pVtab->pModule;
  if( pMod->xFindFunction==0 ) return pDef;
................................................................................
  WhereLoop *pNew;          /* Template WhereLoop */
  WhereOrSet *pOrSet;       /* Record best loops here, if not NULL */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  UnpackedRecord *pRec;     /* Probe for stat4 (if required) */
  int nRecValid;            /* Number of valid fields currently in pRec */
#endif
  unsigned int bldFlags;    /* SQLITE_BLDF_* flags */
  unsigned int iPlanLimit;  /* Search limiter */
};

/* Allowed values for WhereLoopBuider.bldFlags */
#define SQLITE_BLDF_INDEXED  0x0001   /* An index is used */
#define SQLITE_BLDF_UNIQUE   0x0002   /* All keys of a UNIQUE index used */

/* The WhereLoopBuilder.iPlanLimit is used to limit the number of
** index+constraint combinations the query planner will consider for a
** particular query.  If this parameter is unlimited, then certain
** pathological queries can spend excess time in the sqlite3WhereBegin()
** routine.  The limit is high enough that is should not impact real-world
** queries.
**
** SQLITE_QUERY_PLANNER_LIMIT is the baseline limit.  The limit is
** increased by SQLITE_QUERY_PLANNER_LIMIT_INCR before each term of the FROM
** clause is processed, so that every table in a join is guaranteed to be
** able to propose a some index+constraint combinations even if the initial
** baseline limit was exhausted by prior tables of the join.
*/
#ifndef SQLITE_QUERY_PLANNER_LIMIT
# define SQLITE_QUERY_PLANNER_LIMIT 20000
#endif
#ifndef SQLITE_QUERY_PLANNER_LIMIT_INCR
# define SQLITE_QUERY_PLANNER_LIMIT_INCR 1000
#endif

/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.
................................................................................
*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(0, pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->y.pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
  }
}

/*
................................................................................
        */
        if( sqlite3Isdigit(zNew[0])
         || zNew[0]=='-'
         || (zNew[0]+1=='0' && iTo==1)
        ){
          if( pLeft->op!=TK_COLUMN 
           || sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT 
           || IsVirtual(pLeft->y.pTab)  /* Value might be numeric */
          ){
            sqlite3ExprDelete(db, pPrefix);
            sqlite3ValueFree(pVal);
            return 0;
          }
        }
      }
................................................................................
    ** virtual table on their second argument, which is the same as
    ** the left-hand side operand in their in-fix form.
    **
    **       vtab_column MATCH expression
    **       MATCH(expression,vtab_column)
    */
    pCol = pList->a[1].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
      for(i=0; i<ArraySize(aOp); i++){
        if( sqlite3StrICmp(pExpr->u.zToken, aOp[i].zOp)==0 ){
          *peOp2 = aOp[i].eOp2;
          *ppRight = pList->a[0].pExpr;
          *ppLeft = pCol;
          return 1;
        }
................................................................................
    **      OVERLOADED(vtab_column,expression)
    **
    ** Historically, xFindFunction expected to see lower-case function
    ** names.  But for this use case, xFindFunction is expected to deal
    ** with function names in an arbitrary case.
    */
    pCol = pList->a[0].pExpr;
    if( pCol->op==TK_COLUMN && IsVirtual(pCol->y.pTab) ){
      sqlite3_vtab *pVtab;
      sqlite3_module *pMod;
      void (*xNotUsed)(sqlite3_context*,int,sqlite3_value**);
      void *pNotUsed;
      pVtab = sqlite3GetVTable(db, pCol->y.pTab)->pVtab;
      assert( pVtab!=0 );
      assert( pVtab->pModule!=0 );
      pMod = (sqlite3_module *)pVtab->pModule;
      if( pMod->xFindFunction!=0 ){
        i = pMod->xFindFunction(pVtab,2, pExpr->u.zToken, &xNotUsed, &pNotUsed);
        if( i>=SQLITE_INDEX_CONSTRAINT_FUNCTION ){
          *peOp2 = i;
................................................................................
        }
      }
    }
  }else if( pExpr->op==TK_NE || pExpr->op==TK_ISNOT || pExpr->op==TK_NOTNULL ){
    int res = 0;
    Expr *pLeft = pExpr->pLeft;
    Expr *pRight = pExpr->pRight;
    if( pLeft->op==TK_COLUMN && IsVirtual(pLeft->y.pTab) ){
      res++;
    }
    if( pRight && pRight->op==TK_COLUMN && IsVirtual(pRight->y.pTab) ){
      res++;
      SWAP(Expr*, pLeft, pRight);
    }
    *ppLeft = pLeft;
    *ppRight = pRight;
    if( pExpr->op==TK_NE ) *peOp2 = SQLITE_INDEX_CONSTRAINT_NE;
    if( pExpr->op==TK_ISNOT ) *peOp2 = SQLITE_INDEX_CONSTRAINT_ISNOT;
................................................................................
  Expr *pTerm;
  if( pItem->fg.isTabFunc==0 ) return;
  pTab = pItem->pTab;
  assert( pTab!=0 );
  pArgs = pItem->u1.pFuncArg;
  if( pArgs==0 ) return;
  for(j=k=0; j<pArgs->nExpr; j++){
    Expr *pRhs;
    while( k<pTab->nCol && (pTab->aCol[k].colFlags & COLFLAG_HIDDEN)==0 ){k++;}
    if( k>=pTab->nCol ){
      sqlite3ErrorMsg(pParse, "too many arguments on %s() - max %d",
                      pTab->zName, j);
      return;
    }
    pColRef = sqlite3ExprAlloc(pParse->db, TK_COLUMN, 0, 0);
    if( pColRef==0 ) return;
    pColRef->iTable = pItem->iCursor;
    pColRef->iColumn = k++;
    pColRef->y.pTab = pTab;
    pRhs = sqlite3PExpr(pParse, TK_UPLUS, 
        sqlite3ExprDup(pParse->db, pArgs->a[j].pExpr, 0), 0);
    pTerm = sqlite3PExpr(pParse, TK_EQ, pColRef, pRhs);
    whereClauseInsert(pWC, pTerm, TERM_DYNAMIC);
  }
}

/************** End of whereexpr.c *******************************************/
/************** Begin file where.c *******************************************/
/*
................................................................................
  if( pPartial ) sqlite3VdbeResolveLabel(v, iContinue);
  if( pTabItem->fg.viaCoroutine ){
    sqlite3VdbeChangeP2(v, addrCounter, regBase+n);
    testcase( pParse->db->mallocFailed );
    translateColumnToCopy(pParse, addrTop, pLevel->iTabCur,
                          pTabItem->regResult, 1);
    sqlite3VdbeGoto(v, addrTop);

  }else{
    sqlite3VdbeAddOp2(v, OP_Next, pLevel->iTabCur, addrTop+1); VdbeCoverage(v);
  }
  sqlite3VdbeChangeP5(v, SQLITE_STMTSTATUS_AUTOINDEX);
  sqlite3VdbeJumpHere(v, addrTop);
  sqlite3ReleaseTempReg(pParse, regRecord);
  
................................................................................

/*
** The table object reference passed as the second argument to this function
** must represent a virtual table. This function invokes the xBestIndex()
** method of the virtual table with the sqlite3_index_info object that
** comes in as the 3rd argument to this function.
**
** If an error occurs, pParse is populated with an error message and an
** appropriate error code is returned.  A return of SQLITE_CONSTRAINT from
** xBestIndex is not considered an error.  SQLITE_CONSTRAINT indicates that
** the current configuration of "unusable" flags in sqlite3_index_info can
** not result in a valid plan.
**
** Whether or not an error is returned, it is the responsibility of the
** caller to eventually free p->idxStr if p->needToFreeIdxStr indicates
** that this is required.
*/
static int vtabBestIndex(Parse *pParse, Table *pTab, sqlite3_index_info *p){
  sqlite3_vtab *pVtab = sqlite3GetVTable(pParse->db, pTab)->pVtab;
  int rc;

  TRACE_IDX_INPUTS(p);
  rc = pVtab->pModule->xBestIndex(pVtab, p);
  TRACE_IDX_OUTPUTS(p);

  if( rc!=SQLITE_OK && rc!=SQLITE_CONSTRAINT ){
    if( rc==SQLITE_NOMEM ){
      sqlite3OomFault(pParse->db);
    }else if( !pVtab->zErrMsg ){
      sqlite3ErrorMsg(pParse, "%s", sqlite3ErrStr(rc));
    }else{
      sqlite3ErrorMsg(pParse, "%s", pVtab->zErrMsg);
    }
  }
  sqlite3_free(pVtab->zErrMsg);
  pVtab->zErrMsg = 0;












  return rc;
}
#endif /* !defined(SQLITE_OMIT_VIRTUALTABLE) */

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
/*
** Estimate the location of a particular key among all keys in an
** index.  Store the results in aStat as follows:
................................................................................
**    (4)  The template has the same or lower cost than the current loop
*/
static int whereLoopInsert(WhereLoopBuilder *pBuilder, WhereLoop *pTemplate){
  WhereLoop **ppPrev, *p;
  WhereInfo *pWInfo = pBuilder->pWInfo;
  sqlite3 *db = pWInfo->pParse->db;
  int rc;

  /* Stop the search once we hit the query planner search limit */
  if( pBuilder->iPlanLimit==0 ){
    WHERETRACE(0xffffffff,("=== query planner search limit reached ===\n"));
    if( pBuilder->pOrSet ) pBuilder->pOrSet->n = 0;
    return SQLITE_DONE;
  }
  pBuilder->iPlanLimit--;

  /* If pBuilder->pOrSet is defined, then only keep track of the costs
  ** and prereqs.
  */
  if( pBuilder->pOrSet!=0 ){
    if( pTemplate->nLTerm ){
#if WHERETRACE_ENABLED
................................................................................
  pIdxInfo->estimatedCost = SQLITE_BIG_DBL / (double)2;
  pIdxInfo->estimatedRows = 25;
  pIdxInfo->idxFlags = 0;
  pIdxInfo->colUsed = (sqlite3_int64)pSrc->colUsed;

  /* Invoke the virtual table xBestIndex() method */
  rc = vtabBestIndex(pParse, pSrc->pTab, pIdxInfo);
  if( rc ){
    if( rc==SQLITE_CONSTRAINT ){
      /* If the xBestIndex method returns SQLITE_CONSTRAINT, that means
      ** that the particular combination of parameters provided is unusable.
      ** Make no entries in the loop table.
      */
      WHERETRACE(0xffff, ("  ^^^^--- non-viable plan rejected!\n"));
      return SQLITE_OK;
    }
    return rc;
  }

  mxTerm = -1;
  assert( pNew->nLSlot>=nConstraint );
  for(i=0; i<nConstraint; i++) pNew->aLTerm[i] = 0;
  pNew->u.vtab.omitMask = 0;
  pIdxCons = *(struct sqlite3_index_constraint**)&pIdxInfo->aConstraint;
  for(i=0; i<nConstraint; i++, pIdxCons++){
................................................................................
  int rc = SQLITE_OK;
  WhereLoop *pNew;
  u8 priorJointype = 0;

  /* Loop over the tables in the join, from left to right */
  pNew = pBuilder->pNew;
  whereLoopInit(pNew);
  pBuilder->iPlanLimit = SQLITE_QUERY_PLANNER_LIMIT;
  for(iTab=0, pItem=pTabList->a; pItem<pEnd; iTab++, pItem++){
    Bitmask mUnusable = 0;
    pNew->iTab = iTab;
    pBuilder->iPlanLimit += SQLITE_QUERY_PLANNER_LIMIT_INCR;
    pNew->maskSelf = sqlite3WhereGetMask(&pWInfo->sMaskSet, pItem->iCursor);
    if( ((pItem->fg.jointype|priorJointype) & (JT_LEFT|JT_CROSS))!=0 ){
      /* This condition is true when pItem is the FROM clause term on the
      ** right-hand-side of a LEFT or CROSS JOIN.  */
      mPrereq = mPrior;
    }
    priorJointype = pItem->fg.jointype;
................................................................................
    {
      rc = whereLoopAddBtree(pBuilder, mPrereq);
    }
    if( rc==SQLITE_OK && pBuilder->pWC->hasOr ){
      rc = whereLoopAddOr(pBuilder, mPrereq, mUnusable);
    }
    mPrior |= pNew->maskSelf;
    if( rc || db->mallocFailed ){
      if( rc==SQLITE_DONE ){
        /* We hit the query planner search limit set by iPlanLimit */
        sqlite3_log(SQLITE_WARNING, "abbreviated query algorithm search");
        rc = SQLITE_OK;
      }else{
        break;
      }
    }
  }

  whereLoopClear(db, pNew);
  return rc;
}

/*
................................................................................
      if( i==nSrc ) return WRC_Continue;
    }
  }

  switch( pExpr->op ){

    case TK_FUNCTION:
      if( !ExprHasProperty(pExpr, EP_WinFunc) ){
        break;
      }else{
        Window *pWin;
        for(pWin=p->pWin; pWin; pWin=pWin->pNextWin){
          if( pExpr->y.pWin==pWin ){
            assert( pWin->pOwner==pExpr );
            return WRC_Prune;
          }
        }
      }
      /* Fall through.  */

................................................................................
** any SQL window functions, this function is a no-op. Otherwise, it 
** rewrites the SELECT statement so that window function xStep functions
** are invoked in the correct order as described under "SELECT REWRITING"
** at the top of this file.
*/
SQLITE_PRIVATE int sqlite3WindowRewrite(Parse *pParse, Select *p){
  int rc = SQLITE_OK;
  if( p->pWin && p->pPrior==0 ){
    Vdbe *v = sqlite3GetVdbe(pParse);
    sqlite3 *db = pParse->db;
    Select *pSub = 0;             /* The subquery */
    SrcList *pSrc = p->pSrc;
    Expr *pWhere = p->pWhere;
    ExprList *pGroupBy = p->pGroupBy;
    Expr *pHaving = p->pHaving;
................................................................................
}

/*
** Attach window object pWin to expression p.
*/
SQLITE_PRIVATE void sqlite3WindowAttach(Parse *pParse, Expr *p, Window *pWin){
  if( p ){
    assert( p->op==TK_FUNCTION );
    /* This routine is only called for the parser.  If pWin was not
    ** allocated due to an OOM, then the parser would fail before ever
    ** invoking this routine */
    if( ALWAYS(pWin) ){
      p->y.pWin = pWin;
      ExprSetProperty(p, EP_WinFunc);
      pWin->pOwner = p;
      if( p->flags & EP_Distinct ){
        sqlite3ErrorMsg(pParse,
           "DISTINCT is not supported for window functions");
      }
    }
  }else{
................................................................................
/*
** Allocate and return a duplicate of the Window object indicated by the
** third argument. Set the Window.pOwner field of the new object to
** pOwner.
*/
SQLITE_PRIVATE Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p){
  Window *pNew = 0;
  if( ALWAYS(p) ){
    pNew = sqlite3DbMallocZero(db, sizeof(Window));
    if( pNew ){
      pNew->zName = sqlite3DbStrDup(db, p->zName);
      pNew->pFilter = sqlite3ExprDup(db, p->pFilter, 0);
      pNew->pPartition = sqlite3ExprListDup(db, p->pPartition, 0);
      pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, 0);
      pNew->eType = p->eType;
................................................................................
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
/* #include <stdio.h> */
/* #include <assert.h> */
/************ Begin %include sections from the grammar ************************/

/* #include "sqliteInt.h" */

/*
** Disable all error recovery processing in the parser push-down
** automaton.
................................................................................
      p->op = (u8)op;
      p->affinity = 0;
      p->flags = EP_Leaf;
      p->iAgg = -1;
      p->pLeft = p->pRight = 0;
      p->x.pList = 0;
      p->pAggInfo = 0;
      p->y.pTab = 0;
      p->op2 = 0;
      p->iTable = 0;
      p->iColumn = 0;



      p->u.zToken = (char*)&p[1];
      memcpy(p->u.zToken, t.z, t.n);
      p->u.zToken[t.n] = 0;
      if( sqlite3Isquote(p->u.zToken[0]) ){
        if( p->u.zToken[0]=='"' ) p->flags |= EP_DblQuoted;
        sqlite3Dequote(p->u.zToken);
      }
................................................................................
             yyTracePrompt,yyTokenName[yymajor]);
        }
#endif
        yy_destructor(yypParser, (YYCODETYPE)yymajor, &yyminorunion);
        yymajor = YYNOCODE;
      }else{
        while( yypParser->yytos >= yypParser->yystack

            && (yyact = yy_find_reduce_action(
                        yypParser->yytos->stateno,
                        YYERRORSYMBOL)) > YY_MAX_SHIFTREDUCE
        ){
          yy_pop_parser_stack(yypParser);
        }
        if( yypParser->yytos < yypParser->yystack || yymajor==0 ){
          yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
          yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
................................................................................
    }
  }
  while( IdChar(z[i]) ){ i++; }
  *tokenType = TK_ID;
  return i;
}

#ifdef SQLITE_ENABLE_NORMALIZE
/*
** Return the length (in bytes) of the token that begins at z[0].
** Store the token type in *tokenType before returning.  If flags has
** SQLITE_TOKEN_NORMALIZE flag enabled, use the identifier token type
** for keywords.  Add SQLITE_TOKEN_QUOTED to flags if the token was
** actually a quoted identifier.  Add SQLITE_TOKEN_KEYWORD to flags
** if the token was recognized as a keyword; this is useful when the
** SQLITE_TOKEN_NORMALIZE flag is used, because it enables the caller
** to differentiate between a keyword being treated as an identifier
** (for normalization purposes) and an actual identifier.
*/
SQLITE_PRIVATE int sqlite3GetTokenNormalized(
  const unsigned char *z,
  int *tokenType,
  int *flags
){
  int n;
  unsigned char iClass = aiClass[*z];
  if( iClass==CC_KYWD ){
    int i;
    for(i=1; aiClass[z[i]]<=CC_KYWD; i++){}
    if( IdChar(z[i]) ){
      /* This token started out using characters that can appear in keywords,
      ** but z[i] is a character not allowed within keywords, so this must
      ** be an identifier instead */
      i++;
      while( IdChar(z[i]) ){ i++; }
      *tokenType = TK_ID;
      return i;
    }
    *tokenType = TK_ID;
    n = keywordCode((char*)z, i, tokenType);
    /* If the token is no longer considered to be an identifier, then it is a
    ** keyword of some kind.  Make the token back into an identifier and then
    ** set the SQLITE_TOKEN_KEYWORD flag.  Several non-identifier tokens are
    ** used verbatim, including IN, IS, NOT, and NULL. */
    switch( *tokenType ){
      case TK_ID: {
        /* do nothing, handled by caller */
        break;
      }
      case TK_IN:
      case TK_IS:
      case TK_NOT:
      case TK_NULL: {
        *flags |= SQLITE_TOKEN_KEYWORD;
        break;
      }
      default: {
        *tokenType = TK_ID;
        *flags |= SQLITE_TOKEN_KEYWORD;
        break;
      }
    }
  }else{
    n = sqlite3GetToken(z, tokenType);
    /* If the token is considered to be an identifier and the character class
    ** of the first character is a quote, set the SQLITE_TOKEN_QUOTED flag. */
    if( *tokenType==TK_ID && (iClass==CC_QUOTE || iClass==CC_QUOTE2) ){
      *flags |= SQLITE_TOKEN_QUOTED;
    }
  }
  return n;
}
#endif /* SQLITE_ENABLE_NORMALIZE */

/*
** Run the parser on the given SQL string.  The parser structure is
** passed in.  An SQLITE_ status code is returned.  If an error occurs
** then an and attempt is made to write an error message into 
** memory obtained from sqlite3_malloc() and to make *pzErrMsg point to that
** error message.
*/
................................................................................
        { SQLITE_DBCONFIG_ENABLE_TRIGGER,        SQLITE_EnableTrigger  },
        { SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, SQLITE_Fts3Tokenizer  },
        { SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, SQLITE_LoadExtension  },
        { SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE,      SQLITE_NoCkptOnClose  },
        { SQLITE_DBCONFIG_ENABLE_QPSG,           SQLITE_EnableQPSG     },
        { SQLITE_DBCONFIG_TRIGGER_EQP,           SQLITE_TriggerEQP     },
        { SQLITE_DBCONFIG_RESET_DATABASE,        SQLITE_ResetDatabase  },
        { SQLITE_DBCONFIG_DEFENSIVE,             SQLITE_Defensive      },
      };
      unsigned int i;
      rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
      for(i=0; i<ArraySize(aFlagOp); i++){
        if( aFlagOp[i].op==op ){
          int onoff = va_arg(ap, int);
          int *pRes = va_arg(ap, int*);
................................................................................
#endif
#if defined(SQLITE_ENABLE_FTS3_TOKENIZER)
                 | SQLITE_Fts3Tokenizer
#endif
#if defined(SQLITE_ENABLE_QPSG)
                 | SQLITE_EnableQPSG
#endif
#if defined(SQLITE_DEFAULT_DEFENSIVE)
                 | SQLITE_Defensive
#endif
      ;
  sqlite3HashInit(&db->aCollSeq);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3HashInit(&db->aModule);
#endif

  /* Add the default collation sequence BINARY. BINARY works for both UTF-8
................................................................................
      sqlite3 *db = va_arg(ap, sqlite3*);
      db->dbOptFlags = (u16)(va_arg(ap, int) & 0xffff);
      break;
    }

    /*   sqlite3_test_control(SQLITE_TESTCTRL_LOCALTIME_FAULT, int onoff);
    **
    ** If parameter onoff is non-zero, subsequent calls to localtime()
    ** and its variants fail. If onoff is zero, undo this setting.

    */
    case SQLITE_TESTCTRL_LOCALTIME_FAULT: {
      sqlite3GlobalConfig.bLocaltimeFault = va_arg(ap, int);
      break;
    }

    /*   sqlite3_test_control(SQLITE_TESTCTRL_INTERNAL_FUNCS, int onoff);
    **
    ** If parameter onoff is non-zero, internal-use-only SQL functions
    ** are visible to ordinary SQL.  This is useful for testing but is
    ** unsafe because invalid parameters to those internal-use-only functions
    ** can result in crashes or segfaults.
    */
    case SQLITE_TESTCTRL_INTERNAL_FUNCTIONS: {
      sqlite3GlobalConfig.bInternalFunctions = va_arg(ap, int);
      break;
    }

    /*   sqlite3_test_control(SQLITE_TESTCTRL_NEVER_CORRUPT, int);
    **
    ** Set or clear a flag that indicates that the database file is always well-
    ** formed and never corrupt.  This flag is clear by default, indicating that
    ** database files might have arbitrary corruption.  Setting the flag during
    ** testing causes certain assert() statements in the code to be activated
................................................................................
  UNUSED_PARAMETER(iSavepoint);
  assert( p->inTransaction );
  assert( p->mxSavepoint >= iSavepoint );
  TESTONLY( p->mxSavepoint = iSavepoint );
  sqlite3Fts3PendingTermsClear(p);
  return SQLITE_OK;
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts3ShadowName(const char *zName){
  static const char *azName[] = {
    "content", "docsize", "segdir", "segments", "stat", 
  };
  unsigned int i;
  for(i=0; i<sizeof(azName)/sizeof(azName[0]); i++){
    if( sqlite3_stricmp(zName, azName[i])==0 ) return 1;
  }
  return 0;
}

static const sqlite3_module fts3Module = {
  /* iVersion      */ 3,
  /* xCreate       */ fts3CreateMethod,
  /* xConnect      */ fts3ConnectMethod,
  /* xBestIndex    */ fts3BestIndexMethod,
  /* xDisconnect   */ fts3DisconnectMethod,
  /* xDestroy      */ fts3DestroyMethod,
  /* xOpen         */ fts3OpenMethod,
  /* xClose        */ fts3CloseMethod,
................................................................................
  /* xCommit       */ fts3CommitMethod,
  /* xRollback     */ fts3RollbackMethod,
  /* xFindFunction */ fts3FindFunctionMethod,
  /* xRename */       fts3RenameMethod,
  /* xSavepoint    */ fts3SavepointMethod,
  /* xRelease      */ fts3ReleaseMethod,
  /* xRollbackTo   */ fts3RollbackToMethod,
  /* xShadowName   */ fts3ShadowName,
};

/*
** This function is registered as the module destructor (called when an
** FTS3 enabled database connection is closed). It frees the memory
** allocated for the tokenizer hash table.
*/
................................................................................
    }
    assert( pToken->pSegcsr==0 );
  }

  return rc;
}

#ifndef SQLITE_DISABLE_FTS4_DEFERRED
/*
** This function is called on each phrase after the position lists for
** any deferred tokens have been loaded into memory. It updates the phrases
** current position list to include only those positions that are really
** instances of the phrase (after considering deferred tokens). If this
** means that the phrase does not appear in the current row, doclist.pList
** and doclist.nList are both zeroed.
................................................................................
      }
      sqlite3_free(aPoslist);
    }
  }

  return SQLITE_OK;
}
#endif /* SQLITE_DISABLE_FTS4_DEFERRED */

/*
** Maximum number of tokens a phrase may have to be considered for the
** incremental doclists strategy.
*/
#define MAX_INCR_PHRASE_TOKENS 4

................................................................................
     0,                           /* xSync         */
     0,                           /* xCommit       */
     0,                           /* xRollback     */
     0,                           /* xFindFunction */
     0,                           /* xRename       */
     0,                           /* xSavepoint    */
     0,                           /* xRelease      */
     0,                           /* xRollbackTo   */
     0                            /* xShadowName   */
  };
  int rc;                         /* Return code */

  rc = sqlite3_create_module(db, "fts4aux", &fts3aux_module, 0);
  return rc;
}

................................................................................
     0,                           /* xSync         */
     0,                           /* xCommit       */
     0,                           /* xRollback     */
     0,                           /* xFindFunction */
     0,                           /* xRename       */
     0,                           /* xSavepoint    */
     0,                           /* xRelease      */
     0,                           /* xRollbackTo   */
     0                            /* xShadowName   */
  };
  int rc;                         /* Return code */

  rc = sqlite3_create_module(db, "fts3tokenize", &fts3tok_module, (void*)pHash);
  return rc;
}

................................................................................
#define JEACH_VALUE   1
#define JEACH_TYPE    2
#define JEACH_ATOM    3
#define JEACH_ID      4
#define JEACH_PARENT  5
#define JEACH_FULLKEY 6
#define JEACH_PATH    7
/* The xBestIndex method assumes that the JSON and ROOT columns are
** the last two columns in the table.  Should this ever changes, be
** sure to update the xBestIndex method. */
#define JEACH_JSON    8
#define JEACH_ROOT    9

  UNUSED_PARAM(pzErr);
  UNUSED_PARAM(argv);
  UNUSED_PARAM(argc);
  UNUSED_PARAM(pAux);
................................................................................
** 1 if the constraint is found, 3 if the constraint and zRoot are found,
** and 0 otherwise.
*/
static int jsonEachBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;                     /* Loop counter or computed array index */
  int aIdx[2];               /* Index of constraints for JSON and ROOT */
  int unusableMask = 0;      /* Mask of unusable JSON and ROOT constraints */
  int idxMask = 0;           /* Mask of usable == constraints JSON and ROOT */
  const struct sqlite3_index_constraint *pConstraint;

  /* This implementation assumes that JSON and ROOT are the last two
  ** columns in the table */
  assert( JEACH_ROOT == JEACH_JSON+1 );
  UNUSED_PARAM(tab);
  aIdx[0] = aIdx[1] = -1;
  pConstraint = pIdxInfo->aConstraint;
  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
    int iCol;
    int iMask;
    if( pConstraint->iColumn < JEACH_JSON ) continue;
    iCol = pConstraint->iColumn - JEACH_JSON;
    assert( iCol==0 || iCol==1 );
    iMask = 1 << iCol;
    if( pConstraint->usable==0 ){
      unusableMask |= iMask;
    }else if( pConstraint->op==SQLITE_INDEX_CONSTRAINT_EQ ){




      aIdx[iCol] = i;
      idxMask |= iMask;
    }
  }

  if( (unusableMask & ~idxMask)!=0 ){
    /* If there are any unusable constraints on JSON or ROOT, then reject
    ** this entire plan */
    return SQLITE_CONSTRAINT;
  }
  if( aIdx[0]<0 ){
    /* No JSON input.  Leave estimatedCost at the huge value that it was
    ** initialized to to discourage the query planner from selecting this
    ** plan. */
    pIdxInfo->idxNum = 0;

  }else{
    pIdxInfo->estimatedCost = 1.0;
    i = aIdx[0];
    pIdxInfo->aConstraintUsage[i].argvIndex = 1;
    pIdxInfo->aConstraintUsage[i].omit = 1;

    if( aIdx[1]<0 ){
      pIdxInfo->idxNum = 1;  /* Only JSON supplied.  Plan 1 */
    }else{
      i = aIdx[1];
      pIdxInfo->aConstraintUsage[i].argvIndex = 2;
      pIdxInfo->aConstraintUsage[i].omit = 1;
      pIdxInfo->idxNum = 3;  /* Both JSON and ROOT are supplied.  Plan 3 */
    }
  }
  return SQLITE_OK;
}

/* Start a search on a new JSON string */
static int jsonEachFilter(
................................................................................
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */
  0                          /* xShadowName */
};

/* The methods of the json_tree virtual table. */
static sqlite3_module jsonTreeModule = {
  0,                         /* iVersion */
  0,                         /* xCreate */
  jsonEachConnect,           /* xConnect */
................................................................................
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */
  0                          /* xShadowName */
};
#endif /* SQLITE_OMIT_VIRTUALTABLE */

/****************************************************************************
** The following routines are the only publically visible identifiers in this
** file.  Call the following routines in order to register the various SQL
** functions and the virtual table implemented by this file.
................................................................................
    }
    sqlite3_free(zSql);
  }

  return rc;
}


/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int rtreeShadowName(const char *zName){
  static const char *azName[] = {
    "node", "parent", "rowid"
  };
  unsigned int i;
  for(i=0; i<sizeof(azName)/sizeof(azName[0]); i++){
    if( sqlite3_stricmp(zName, azName[i])==0 ) return 1;
  }
  return 0;
}

static sqlite3_module rtreeModule = {
  3,                          /* iVersion */
  rtreeCreate,                /* xCreate - create a table */
  rtreeConnect,               /* xConnect - connect to an existing table */
  rtreeBestIndex,             /* xBestIndex - Determine search strategy */
  rtreeDisconnect,            /* xDisconnect - Disconnect from a table */
  rtreeDestroy,               /* xDestroy - Drop a table */
  rtreeOpen,                  /* xOpen - open a cursor */
  rtreeClose,                 /* xClose - close a cursor */
................................................................................
  rtreeEndTransaction,        /* xCommit - commit transaction */
  rtreeEndTransaction,        /* xRollback - rollback transaction */
  0,                          /* xFindFunction - function overloading */
  rtreeRename,                /* xRename - rename the table */
  rtreeSavepoint,             /* xSavepoint */
  0,                          /* xRelease */
  0,                          /* xRollbackTo */
  rtreeShadowName             /* xShadowName */
};

static int rtreeSqlInit(
  Rtree *pRtree, 
  sqlite3 *db, 
  const char *zDb, 
  const char *zPrefix, 
................................................................................
** each segment is "outside" and the area to the left is "inside".
**
** The on-disk representation consists of a 4-byte header followed by
** the values.  The 4-byte header is:
**
**      encoding    (1 byte)   0=big-endian, 1=little-endian
**      nvertex     (3 bytes)  Number of vertexes as a big-endian integer
**
** Enough space is allocated for 4 coordinates, to work around over-zealous
** warnings coming from some compiler (notably, clang). In reality, the size
** of each GeoPoly memory allocate is adjusted as necessary so that the
** GeoPoly.a[] array at the end is the appropriate size.
*/
typedef struct GeoPoly GeoPoly;
struct GeoPoly {
  int nVertex;          /* Number of vertexes */
  unsigned char hdr[4]; /* Header for on-disk representation */
  GeoCoord a[8];        /* 2*nVertex values. X (longitude) first, then Y */
};

/* The size of a memory allocation needed for a GeoPoly object sufficient
** to hold N coordinate pairs.
*/
#define GEOPOLY_SZ(N)  (sizeof(GeoPoly) + sizeof(GeoCoord)*2*((N)-4))

/*
** State of a parse of a GeoJSON input.
*/
typedef struct GeoParse GeoParse;
struct GeoParse {
  const unsigned char *z;   /* Unparsed input */
................................................................................
  t = a[1];
  a[1] = a[2];
  a[2] = t;
}

/* Skip whitespace.  Return the next non-whitespace character. */
static char geopolySkipSpace(GeoParse *p){
  while( safe_isspace(p->z[0]) ) p->z++;
  return p->z[0];
}

/* Parse out a number.  Write the value into *pVal if pVal!=0.
** return non-zero on success and zero if the next token is not a number.
*/
static int geopolyParseNumber(GeoParse *p, GeoCoord *pVal){
................................................................................
  if( c=='-' ){
    j = 1;
    c = z[j];
  }
  if( c=='0' && z[j+1]>='0' && z[j+1]<='9' ) return 0;
  for(;; j++){
    c = z[j];
    if( safe_isdigit(c) ) continue;
    if( c=='.' ){
      if( z[j-1]=='-' ) return 0;
      if( seenDP ) return 0;
      seenDP = 1;
      continue;
    }
    if( c=='e' || c=='E' ){
................................................................................
      }
      if( c<'0' || c>'9' ) return 0;
      continue;
    }
    break;
  }
  if( z[j-1]<'0' ) return 0;
  if( pVal ){
#ifdef SQLITE_AMALGAMATION
     /* The sqlite3AtoF() routine is much much faster than atof(), if it
     ** is available */
     double r;
     (void)sqlite3AtoF((const char*)p->z, &r, j, SQLITE_UTF8);
     *pVal = r;
#else
     *pVal = (GeoCoord)atof((const char*)p->z);
#endif
  }
  p->z += j;
  return 1;
}

/*
** If the input is a well-formed JSON array of coordinates with at least
** four coordinates and where each coordinate is itself a two-value array,
................................................................................
    }
    if( geopolySkipSpace(&s)==']'
     && s.nVertex>=4
     && s.a[0]==s.a[s.nVertex*2-2]
     && s.a[1]==s.a[s.nVertex*2-1]
     && (s.z++, geopolySkipSpace(&s)==0)
    ){

      GeoPoly *pOut;
      int x = 1;
      s.nVertex--;  /* Remove the redundant vertex at the end */

      pOut = sqlite3_malloc64( GEOPOLY_SZ(s.nVertex) );
      x = 1;
      if( pOut==0 ) goto parse_json_err;
      pOut->nVertex = s.nVertex;
      memcpy(pOut->a, s.a, s.nVertex*2*sizeof(GeoCoord));
      pOut->hdr[0] = *(unsigned char*)&x;
      pOut->hdr[1] = (s.nVertex>>16)&0xff;
      pOut->hdr[2] = (s.nVertex>>8)&0xff;
................................................................................
      p->a[ii*2+1] = y1;
    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }
}

/*
** Compute the area enclosed by the polygon.
**
** This routine can also be used to detect polygons that rotate in
** the wrong direction.  Polygons are suppose to be counter-clockwise (CCW).
** This routine returns a negative value for clockwise (CW) polygons.
*/
static double geopolyArea(GeoPoly *p){
  double rArea = 0.0;
  int ii;
  for(ii=0; ii<p->nVertex-1; ii++){
    rArea += (p->a[ii*2] - p->a[ii*2+2])           /* (x0 - x1) */
              * (p->a[ii*2+1] + p->a[ii*2+3])      /* (y0 + y1) */
              * 0.5;
  }
  rArea += (p->a[ii*2] - p->a[0])                  /* (xN - x0) */
           * (p->a[ii*2+1] + p->a[1])              /* (yN + y0) */
           * 0.5;
  return rArea;
}

/*
** Implementation of the geopoly_area(X) function.
**
** If the input is a well-formed Geopoly BLOB then return the area
** enclosed by the polygon.  If the polygon circulates clockwise instead
** of counterclockwise (as it should) then return the negative of the
................................................................................
static void geopolyAreaFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    sqlite3_result_double(context, geopolyArea(p));
    sqlite3_free(p);
  }            
}

/*
** Implementation of the geopoly_ccw(X) function.
**
** If the rotation of polygon X is clockwise (incorrect) instead of
** counter-clockwise (the correct winding order according to RFC7946)
** then reverse the order of the vertexes in polygon X.  
**
** In other words, this routine returns a CCW polygon regardless of the
** winding order of its input.
**
** Use this routine to sanitize historical inputs that that sometimes
** contain polygons that wind in the wrong direction.
*/
static void geopolyCcwFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  GeoPoly *p = geopolyFuncParam(context, argv[0], 0);
  if( p ){
    if( geopolyArea(p)<0.0 ){
      int ii, jj;




      for(ii=2, jj=p->nVertex*2 - 2; ii<jj; ii+=2, jj-=2){
        GeoCoord t = p->a[ii];
        p->a[ii] = p->a[jj];
        p->a[jj] = t;
        t = p->a[ii+1];
        p->a[ii+1] = p->a[jj+1];
        p->a[jj+1] = t;
      }



    }
    sqlite3_result_blob(context, p->hdr, 
       4+8*p->nVertex, SQLITE_TRANSIENT);
    sqlite3_free(p);
  }            
}

#define GEOPOLY_PI 3.1415926535897932385

/* Fast approximation for sine(X) for X between -0.5*pi and 2*pi
*/
static double geopolySine(double r){
  assert( r>=-0.5*GEOPOLY_PI && r<=2.0*GEOPOLY_PI );
  if( r>=1.5*GEOPOLY_PI ){
    r -= 2.0*GEOPOLY_PI;
  }
  if( r>=0.5*GEOPOLY_PI ){
    return -geopolySine(r-GEOPOLY_PI);
  }else{
    double r2 = r*r;
    double r3 = r2*r;
    double r5 = r3*r2;
    return 0.9996949*r - 0.1656700*r3 + 0.0075134*r5;
  }
}

/*
** Function:   geopoly_regular(X,Y,R,N)
**
** Construct a simple, convex, regular polygon centered at X, Y
** with circumradius R and with N sides.
*/
static void geopolyRegularFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  double x = sqlite3_value_double(argv[0]);
  double y = sqlite3_value_double(argv[1]);
  double r = sqlite3_value_double(argv[2]);
  int n = sqlite3_value_int(argv[3]);
  int i;
  GeoPoly *p;

  if( n<3 || r<=0.0 ) return;
  if( n>1000 ) n = 1000;
  p = sqlite3_malloc64( sizeof(*p) + (n-1)*2*sizeof(GeoCoord) );
  if( p==0 ){
    sqlite3_result_error_nomem(context);
    return;
  }
  i = 1;
  p->hdr[0] = *(unsigned char*)&i;
  p->hdr[1] = 0;
  p->hdr[2] = (n>>8)&0xff;
  p->hdr[3] = n&0xff;
  for(i=0; i<n; i++){
    double rAngle = 2.0*GEOPOLY_PI*i/n;
    p->a[i*2] = x - r*geopolySine(rAngle-0.5*GEOPOLY_PI);
    p->a[i*2+1] = y + r*geopolySine(rAngle);
  }
  sqlite3_result_blob(context, p->hdr, 4+8*n, SQLITE_TRANSIENT);
  sqlite3_free(p);
}

/*
** If pPoly is a polygon, compute its bounding box. Then:
**
**    (1) if aCoord!=0 store the bounding box in aCoord, returning NULL
**    (2) otherwise, compute a GeoPoly for the bounding box and return the
**        new GeoPoly
................................................................................
      r = p->a[ii*2+1];
      if( r<mnY ) mnY = (float)r;
      else if( r>mxY ) mxY = (float)r;
    }
    if( pRc ) *pRc = SQLITE_OK;
    if( aCoord==0 ){
      geopolyBboxFill:
      pOut = sqlite3_realloc(p, GEOPOLY_SZ(4));
      if( pOut==0 ){
        sqlite3_free(p);
        if( context ) sqlite3_result_error_nomem(context);
        if( pRc ) *pRc = SQLITE_NOMEM;
        return 0;
      }
      pOut->nVertex = 4;
................................................................................
    int jj;
    int nChange = 0;
    sqlite3_bind_int64(pUp, 1, cell.iRowid);
    assert( pRtree->nAux>=1 );
    if( sqlite3_value_nochange(aData[2]) ){
      sqlite3_bind_null(pUp, 2);
    }else{
      GeoPoly *p = 0;
      if( sqlite3_value_type(aData[2])==SQLITE_TEXT
       && (p = geopolyFuncParam(0, aData[2], &rc))!=0
       && rc==SQLITE_OK
      ){
        sqlite3_bind_blob(pUp, 2, p->hdr, 4+8*p->nVertex, SQLITE_TRANSIENT);
      }else{
        sqlite3_bind_value(pUp, 2, aData[2]);
      }
      sqlite3_free(p);
      nChange = 1;
    }
    for(jj=1; jj<pRtree->nAux; jj++){
      nChange++;
      sqlite3_bind_value(pUp, jj+2, aData[jj+2]);
    }
    if( nChange ){
................................................................................
    return SQLITE_INDEX_CONSTRAINT_FUNCTION+1;
  }
  return 0;
}


static sqlite3_module geopolyModule = {
  3,                          /* iVersion */
  geopolyCreate,              /* xCreate - create a table */
  geopolyConnect,             /* xConnect - connect to an existing table */
  geopolyBestIndex,           /* xBestIndex - Determine search strategy */
  rtreeDisconnect,            /* xDisconnect - Disconnect from a table */
  rtreeDestroy,               /* xDestroy - Drop a table */
  rtreeOpen,                  /* xOpen - open a cursor */
  rtreeClose,                 /* xClose - close a cursor */
................................................................................
  rtreeEndTransaction,        /* xCommit - commit transaction */
  rtreeEndTransaction,        /* xRollback - rollback transaction */
  geopolyFindFunction,        /* xFindFunction - function overloading */
  rtreeRename,                /* xRename - rename the table */
  rtreeSavepoint,             /* xSavepoint */
  0,                          /* xRelease */
  0,                          /* xRollbackTo */
  rtreeShadowName             /* xShadowName */
};

static int sqlite3_geopoly_init(sqlite3 *db){
  int rc = SQLITE_OK;
  static const struct {
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
    signed char nArg;
    unsigned char bPure;
    const char *zName;
  } aFunc[] = {
     { geopolyAreaFunc,          1, 1,    "geopoly_area"             },
     { geopolyBlobFunc,          1, 1,    "geopoly_blob"             },
     { geopolyJsonFunc,          1, 1,    "geopoly_json"             },
     { geopolySvgFunc,          -1, 1,    "geopoly_svg"              },
     { geopolyWithinFunc,        2, 1,    "geopoly_within"           },
     { geopolyContainsPointFunc, 3, 1,    "geopoly_contains_point"   },
     { geopolyOverlapFunc,       2, 1,    "geopoly_overlap"          },
     { geopolyDebugFunc,         1, 0,    "geopoly_debug"            },
     { geopolyBBoxFunc,          1, 1,    "geopoly_bbox"             },
     { geopolyXformFunc,         7, 1,    "geopoly_xform"            },
     { geopolyRegularFunc,       4, 1,    "geopoly_regular"          },
     { geopolyCcwFunc,           1, 1,    "geopoly_ccw"              },
  };
  static const struct {
    void (*xStep)(sqlite3_context*,int,sqlite3_value**);
    void (*xFinal)(sqlite3_context*);
    const char *zName;
  } aAgg[] = {
     { geopolyBBoxStep, geopolyBBoxFinal, "geopoly_group_bbox"    },
  };
  int i;
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    int enc = aFunc[i].bPure ? SQLITE_UTF8|SQLITE_DETERMINISTIC : SQLITE_UTF8;
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 enc, 0,
                                 aFunc[i].xFunc, 0, 0);
  }
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aAgg[i].zName, 1, SQLITE_UTF8, 0,
                                 0, aAgg[i].xStep, aAgg[i].xFinal);
  }
  if( rc==SQLITE_OK ){
................................................................................
** space used by the RBU handle.
*/
struct rbu_vfs {
  sqlite3_vfs base;               /* rbu VFS shim methods */
  sqlite3_vfs *pRealVfs;          /* Underlying VFS */
  sqlite3_mutex *mutex;           /* Mutex to protect pMain */
  sqlite3rbu *pRbu;               /* Owner RBU object */
  rbu_file *pMain;                /* List of main db files */
  rbu_file *pMainRbu;             /* List of main db files with pRbu!=0 */
};

/*
** Each file opened by an rbu VFS is represented by an instance of
** the following structure.
**
** If this is a temporary file (pRbu!=0 && flags&DELETE_ON_CLOSE), variable
................................................................................
  int nShm;                       /* Number of entries in apShm[] array */
  char **apShm;                   /* Array of mmap'd *-shm regions */
  char *zDel;                     /* Delete this when closing file */

  const char *zWal;               /* Wal filename for this main db file */
  rbu_file *pWalFd;               /* Wal file descriptor for this main db */
  rbu_file *pMainNext;            /* Next MAIN_DB file */
  rbu_file *pMainRbuNext;         /* Next MAIN_DB file with pRbu!=0 */
};

/*
** True for an RBU vacuum handle, or false otherwise.
*/
#define rbuIsVacuum(p) ((p)->zTarget==0)

................................................................................
  i64 nDiff = nNew - pFd->sz;
  pRbu->szTemp += nDiff;
  pFd->sz = nNew;
  assert( pRbu->szTemp>=0 );
  if( pRbu->szTempLimit && pRbu->szTemp>pRbu->szTempLimit ) return SQLITE_FULL;
  return SQLITE_OK;
}

/*
** Add an item to the main-db lists, if it is not already present.
**
** There are two main-db lists. One for all file descriptors, and one
** for all file descriptors with rbu_file.pDb!=0. If the argument has
** rbu_file.pDb!=0, then it is assumed to already be present on the
** main list and is only added to the pDb!=0 list.
*/
static void rbuMainlistAdd(rbu_file *p){
  rbu_vfs *pRbuVfs = p->pRbuVfs;
  rbu_file *pIter;
  assert( (p->openFlags & SQLITE_OPEN_MAIN_DB) );
  sqlite3_mutex_enter(pRbuVfs->mutex);
  if( p->pRbu==0 ){
    for(pIter=pRbuVfs->pMain; pIter; pIter=pIter->pMainNext);
    p->pMainNext = pRbuVfs->pMain;
    pRbuVfs->pMain = p;
  }else{
    for(pIter=pRbuVfs->pMainRbu; pIter && pIter!=p; pIter=pIter->pMainRbuNext){}
    if( pIter==0 ){
      p->pMainRbuNext = pRbuVfs->pMainRbu;
      pRbuVfs->pMainRbu = p;
    }
  }
  sqlite3_mutex_leave(pRbuVfs->mutex);
}

/*
** Remove an item from the main-db lists.
*/
static void rbuMainlistRemove(rbu_file *p){
  rbu_file **pp;
  sqlite3_mutex_enter(p->pRbuVfs->mutex);
  for(pp=&p->pRbuVfs->pMain; *pp && *pp!=p; pp=&((*pp)->pMainNext)){}
  if( *pp ) *pp = p->pMainNext;
  p->pMainNext = 0;
  for(pp=&p->pRbuVfs->pMainRbu; *pp && *pp!=p; pp=&((*pp)->pMainRbuNext)){}
  if( *pp ) *pp = p->pMainRbuNext;
  p->pMainRbuNext = 0;
  sqlite3_mutex_leave(p->pRbuVfs->mutex);
}

/*
** Given that zWal points to a buffer containing a wal file name passed to 
** either the xOpen() or xAccess() VFS method, search the main-db list for
** a file-handle opened by the same database connection on the corresponding
** database file.
**
** If parameter bRbu is true, only search for file-descriptors with
** rbu_file.pDb!=0.
*/
static rbu_file *rbuFindMaindb(rbu_vfs *pRbuVfs, const char *zWal, int bRbu){
  rbu_file *pDb;
  sqlite3_mutex_enter(pRbuVfs->mutex);
  if( bRbu ){
    for(pDb=pRbuVfs->pMainRbu; pDb && pDb->zWal!=zWal; pDb=pDb->pMainRbuNext){}
  }else{
    for(pDb=pRbuVfs->pMain; pDb && pDb->zWal!=zWal; pDb=pDb->pMainNext){}
  }
  sqlite3_mutex_leave(pRbuVfs->mutex);
  return pDb;
}

/*
** Close an rbu file.
*/
static int rbuVfsClose(sqlite3_file *pFile){
  rbu_file *p = (rbu_file*)pFile;
  int rc;
................................................................................
    sqlite3_free(p->apShm[i]);
  }
  sqlite3_free(p->apShm);
  p->apShm = 0;
  sqlite3_free(p->zDel);

  if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
    rbuMainlistRemove(p);




    rbuUnlockShm(p);
    p->pReal->pMethods->xShmUnmap(p->pReal, 0);
  }
  else if( (p->openFlags & SQLITE_OPEN_DELETEONCLOSE) && p->pRbu ){
    rbuUpdateTempSize(p, 0);
  }
  assert( p->pMainNext==0 && p->pRbuVfs->pMain!=p );

  /* Close the underlying file handle */
  rc = p->pReal->pMethods->xClose(p->pReal);
  return rc;
}


................................................................................
      rc = xControl(p->pReal, SQLITE_FCNTL_ZIPVFS, &dummy);
      if( rc==SQLITE_OK ){
        rc = SQLITE_ERROR;
        pRbu->zErrmsg = sqlite3_mprintf("rbu/zipvfs setup error");
      }else if( rc==SQLITE_NOTFOUND ){
        pRbu->pTargetFd = p;
        p->pRbu = pRbu;
        if( p->openFlags & SQLITE_OPEN_MAIN_DB ){
          rbuMainlistAdd(p);
        }
        if( p->pWalFd ) p->pWalFd->pRbu = pRbu;
        rc = SQLITE_OK;
      }
    }
    return rc;
  }
  else if( op==SQLITE_FCNTL_RBUCNT ){
................................................................................
    /* Release the checkpointer and writer locks */
    rbuUnlockShm(p);
    rc = p->pReal->pMethods->xShmUnmap(p->pReal, delFlag);
  }
  return rc;
}















/* 
** A main database named zName has just been opened. The following 
** function returns a pointer to a buffer owned by SQLite that contains
** the name of the *-wal file this db connection will use. SQLite
** happens to pass a pointer to this buffer when using xAccess()
** or xOpen() to operate on the *-wal file.  
*/
................................................................................
      ** (pFd->zWal) to point to a buffer owned by SQLite that contains
      ** the name of the *-wal file this db connection will use. SQLite
      ** happens to pass a pointer to this buffer when using xAccess()
      ** or xOpen() to operate on the *-wal file.  */
      pFd->zWal = rbuMainToWal(zName, flags);
    }
    else if( flags & SQLITE_OPEN_WAL ){
      rbu_file *pDb = rbuFindMaindb(pRbuVfs, zName, 0);
      if( pDb ){
        if( pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
          /* This call is to open a *-wal file. Intead, open the *-oal. This
          ** code ensures that the string passed to xOpen() is terminated by a
          ** pair of '\0' bytes in case the VFS attempts to extract a URI 
          ** parameter from it.  */
          const char *zBase = zName;
................................................................................
  }
  if( pFd->pReal->pMethods ){
    /* The xOpen() operation has succeeded. Set the sqlite3_file.pMethods
    ** pointer and, if the file is a main database file, link it into the
    ** mutex protected linked list of all such files.  */
    pFile->pMethods = &rbuvfs_io_methods;
    if( flags & SQLITE_OPEN_MAIN_DB ){
      rbuMainlistAdd(pFd);



    }
  }else{
    sqlite3_free(pFd->zDel);
  }

  return rc;
}
................................................................................
  **
  **   b) if the *-wal file does not exist, claim that it does anyway,
  **      causing SQLite to call xOpen() to open it. This call will also
  **      be intercepted (see the rbuVfsOpen() function) and the *-oal
  **      file opened instead.
  */
  if( rc==SQLITE_OK && flags==SQLITE_ACCESS_EXISTS ){
    rbu_file *pDb = rbuFindMaindb(pRbuVfs, zPath, 1);
    if( pDb && pDb->pRbu && pDb->pRbu->eStage==RBU_STAGE_OAL ){
      if( *pResOut ){
        rc = SQLITE_CANTOPEN;
      }else{
        sqlite3_int64 sz = 0;
        rc = rbuVfsFileSize(&pDb->base, &sz);
        *pResOut = (sz>0);
................................................................................
** operate on a different database schema, so check for it.
**
** idxNum is normally 0, but will be 1 if a schema=? constraint exists.
*/
static int statBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
  int i;



  /* Look for a valid schema=? constraint.  If found, change the idxNum to
  ** 1 and request the value of that constraint be sent to xFilter.  And
  ** lower the cost estimate to encourage the constrained version to be
  ** used.
  */
  for(i=0; i<pIdxInfo->nConstraint; i++){
    if( pIdxInfo->aConstraint[i].iColumn!=10 ) continue;
    if( pIdxInfo->aConstraint[i].usable==0 ) return SQLITE_CONSTRAINT;
    if( pIdxInfo->aConstraint[i].op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;

    pIdxInfo->idxNum = 1;
    pIdxInfo->estimatedCost = 1.0;
    pIdxInfo->aConstraintUsage[i].argvIndex = 1;
    pIdxInfo->aConstraintUsage[i].omit = 1;
    break;
  }

................................................................................
    pCsr->iDb = pTab->iDb;
  }

  *ppCursor = (sqlite3_vtab_cursor *)pCsr;
  return SQLITE_OK;
}

static void statClearCells(StatPage *p){
  int i;
  if( p->aCell ){
    for(i=0; i<p->nCell; i++){
      sqlite3_free(p->aCell[i].aOvfl);
    }
    sqlite3_free(p->aCell);
  }
  p->nCell = 0;
  p->aCell = 0;
}

static void statClearPage(StatPage *p){
  statClearCells(p);
  sqlite3PagerUnref(p->pPg);
  sqlite3_free(p->zPath);
  memset(p, 0, sizeof(StatPage));
}

static void statResetCsr(StatCursor *pCsr){
  int i;
................................................................................
  int isLeaf;
  int szPage;

  u8 *aData = sqlite3PagerGetData(p->pPg);
  u8 *aHdr = &aData[p->iPgno==1 ? 100 : 0];

  p->flags = aHdr[0];
  if( p->flags==0x0A || p->flags==0x0D ){
    isLeaf = 1;
    nHdr = 8;
  }else if( p->flags==0x05 || p->flags==0x02 ){
    isLeaf = 0;
    nHdr = 12;
  }else{
    goto statPageIsCorrupt;
  }
  if( p->iPgno==1 ) nHdr += 100;
  p->nCell = get2byte(&aHdr[3]);
  p->nMxPayload = 0;



  szPage = sqlite3BtreeGetPageSize(pBt);

  nUnused = get2byte(&aHdr[5]) - nHdr - 2*p->nCell;
  nUnused += (int)aHdr[7];
  iOff = get2byte(&aHdr[1]);
  while( iOff ){
    int iNext;
    if( iOff>=szPage ) goto statPageIsCorrupt;
    nUnused += get2byte(&aData[iOff+2]);
    iNext = get2byte(&aData[iOff]);
    if( iNext<iOff+4 && iNext>0 ) goto statPageIsCorrupt;
    iOff = iNext;
  }
  p->nUnused = nUnused;
  p->iRightChildPg = isLeaf ? 0 : sqlite3Get4byte(&aHdr[8]);


  if( p->nCell ){
    int i;                        /* Used to iterate through cells */
    int nUsable;                  /* Usable bytes per page */

    sqlite3BtreeEnter(pBt);
    nUsable = szPage - sqlite3BtreeGetReserveNoMutex(pBt);
................................................................................
    if( p->aCell==0 ) return SQLITE_NOMEM_BKPT;
    memset(p->aCell, 0, (p->nCell+1) * sizeof(StatCell));

    for(i=0; i<p->nCell; i++){
      StatCell *pCell = &p->aCell[i];

      iOff = get2byte(&aData[nHdr+i*2]);
      if( iOff<nHdr || iOff>=szPage ) goto statPageIsCorrupt;
      if( !isLeaf ){
        pCell->iChildPg = sqlite3Get4byte(&aData[iOff]);
        iOff += 4;
      }
      if( p->flags==0x05 ){
        /* A table interior node. nPayload==0. */
      }else{
................................................................................
        iOff += getVarint32(&aData[iOff], nPayload);
        if( p->flags==0x0D ){
          u64 dummy;
          iOff += sqlite3GetVarint(&aData[iOff], &dummy);
        }
        if( nPayload>(u32)p->nMxPayload ) p->nMxPayload = nPayload;
        getLocalPayload(nUsable, p->flags, nPayload, &nLocal);
        if( nLocal<0 ) goto statPageIsCorrupt;
        pCell->nLocal = nLocal;

        assert( nPayload>=(u32)nLocal );
        assert( nLocal<=(nUsable-35) );
        if( nPayload>(u32)nLocal ){
          int j;
          int nOvfl = ((nPayload - nLocal) + nUsable-4 - 1) / (nUsable - 4);
          if( iOff+nLocal>nUsable ) goto statPageIsCorrupt;
          pCell->nLastOvfl = (nPayload-nLocal) - (nOvfl-1) * (nUsable-4);
          pCell->nOvfl = nOvfl;
          pCell->aOvfl = sqlite3_malloc64(sizeof(u32)*nOvfl);
          if( pCell->aOvfl==0 ) return SQLITE_NOMEM_BKPT;
          pCell->aOvfl[0] = sqlite3Get4byte(&aData[iOff+nLocal]);
          for(j=1; j<nOvfl; j++){
            int rc;
................................................................................
          }
        }
      }
    }
  }

  return SQLITE_OK;

statPageIsCorrupt:
  p->flags = 0;
  statClearCells(p);
  return SQLITE_OK;
}

/*
** Populate the pCsr->iOffset and pCsr->szPage member variables. Based on
** the current value of pCsr->iPageno.
*/
static void statSizeAndOffset(StatCursor *pCsr){
................................................................................
    0,                            /* xCommit */
    0,                            /* xRollback */
    0,                            /* xFindMethod */
    0,                            /* xRename */
    0,                            /* xSavepoint */
    0,                            /* xRelease */
    0,                            /* xRollbackTo */
    0                             /* xShadowName */
  };
  return sqlite3_create_module(db, "dbstat", &dbstat_module, 0);
}
#elif defined(SQLITE_ENABLE_DBSTAT_VTAB)
SQLITE_PRIVATE int sqlite3DbstatRegister(sqlite3 *db){ return SQLITE_OK; }
#endif /* SQLITE_ENABLE_DBSTAT_VTAB */

................................................................................
  ** unavailable
  */
  for(i=0; i<pIdxInfo->nConstraint; i++){
    struct sqlite3_index_constraint *p = &pIdxInfo->aConstraint[i];
    if( p->iColumn!=DBPAGE_COLUMN_SCHEMA ) continue;
    if( p->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
    if( !p->usable ){
      /* No solution. */

      return SQLITE_CONSTRAINT;
    }
    iPlan = 2;
    pIdxInfo->aConstraintUsage[i].argvIndex = 1;
    pIdxInfo->aConstraintUsage[i].omit = 1;
    break;
  }

................................................................................
  char *zErr = 0;
  const char *zSchema;
  int iDb;
  Btree *pBt;
  Pager *pPager;
  int szPage;

  if( pTab->db->flags & SQLITE_Defensive ){
    zErr = "read-only";
    goto update_fail;
  }
  if( argc==1 ){
    zErr = "cannot delete";
    goto update_fail;
  }
  pgno = sqlite3_value_int(argv[0]);
  if( (Pgno)sqlite3_value_int(argv[1])!=pgno ){
    zErr = "cannot insert";
................................................................................
    0,                            /* xCommit */
    0,                            /* xRollback */
    0,                            /* xFindMethod */
    0,                            /* xRename */
    0,                            /* xSavepoint */
    0,                            /* xRelease */
    0,                            /* xRollbackTo */
    0                             /* xShadowName */
  };
  return sqlite3_create_module(db, "sqlite_dbpage", &dbpage_module, 0);
}
#elif defined(SQLITE_ENABLE_DBPAGE_VTAB)
SQLITE_PRIVATE int sqlite3DbpageRegister(sqlite3 *db){ return SQLITE_OK; }
#endif /* SQLITE_ENABLE_DBSTAT_VTAB */

................................................................................
#ifndef SESSIONS_STRM_CHUNK_SIZE
# ifdef SQLITE_TEST
#   define SESSIONS_STRM_CHUNK_SIZE 64
# else
#   define SESSIONS_STRM_CHUNK_SIZE 1024
# endif
#endif

static int sessions_strm_chunk_size = SESSIONS_STRM_CHUNK_SIZE;

typedef struct SessionHook SessionHook;
struct SessionHook {
  void *pCtx;
  int (*xOld)(void*,int,sqlite3_value**);
  int (*xNew)(void*,int,sqlite3_value**);
  int (*xCount)(void*);
................................................................................
/*
** Structure for changeset iterators.
*/
struct sqlite3_changeset_iter {
  SessionInput in;                /* Input buffer or stream */
  SessionBuffer tblhdr;           /* Buffer to hold apValue/zTab/abPK/ */
  int bPatchset;                  /* True if this is a patchset */
  int bInvert;                    /* True to invert changeset */
  int rc;                         /* Iterator error code */
  sqlite3_stmt *pConflict;        /* Points to conflicting row, if any */
  char *zTab;                     /* Current table */
  int nCol;                       /* Number of columns in zTab */
  int op;                         /* Current operation */
  int bIndirect;                  /* True if current change was indirect */
  u8 *abPK;                       /* Primary key array */
................................................................................
** columns and columns that are modified by the UPDATE are set to "undefined".
** PRIMARY KEY fields contain the values identifying the table row to update,
** and fields associated with modified columns contain the new column values.
**
** The records associated with INSERT changes are in the same format as for
** changesets. It is not possible for a record associated with an INSERT
** change to contain a field set to "undefined".
**
** REBASE BLOB FORMAT:
**
** A rebase blob may be output by sqlite3changeset_apply_v2() and its 
** streaming equivalent for use with the sqlite3_rebaser APIs to rebase
** existing changesets. A rebase blob contains one entry for each conflict
** resolved using either the OMIT or REPLACE strategies within the apply_v2()
** call.
**
** The format used for a rebase blob is very similar to that used for
** changesets. All entries related to a single table are grouped together.
**
** Each group of entries begins with a table header in changeset format:
**
**   1 byte: Constant 0x54 (capital 'T')
**   Varint: Number of columns in the table.
**   nCol bytes: 0x01 for PK columns, 0x00 otherwise.
**   N bytes: Unqualified table name (encoded using UTF-8). Nul-terminated.
**
** Followed by one or more entries associated with the table.
**
**   1 byte: Either SQLITE_INSERT (0x12), DELETE (0x09).
**   1 byte: Flag. 0x01 for REPLACE, 0x00 for OMIT.
**   record: (in the record format defined above).
**
** In a rebase blob, the first field is set to SQLITE_INSERT if the change
** that caused the conflict was an INSERT or UPDATE, or to SQLITE_DELETE if
** it was a DELETE. The second field is set to 0x01 if the conflict 
** resolution strategy was REPLACE, or 0x00 if it was OMIT.
**
** If the change that caused the conflict was a DELETE, then the single
** record is a copy of the old.* record from the original changeset. If it
** was an INSERT, then the single record is a copy of the new.* record. If
** the conflicting change was an UPDATE, then the single record is a copy
** of the new.* record with the PK fields filled in based on the original
** old.* record.
*/

/*
** For each row modified during a session, there exists a single instance of
** this structure stored in a SessionTable.aChange[] hash table.
*/
struct SessionChange {
................................................................................
**
** If successful, return zero. Otherwise, if an OOM condition is encountered,
** set *pRc to SQLITE_NOMEM and return non-zero.
*/
static int sessionBufferGrow(SessionBuffer *p, int nByte, int *pRc){
  if( *pRc==SQLITE_OK && p->nAlloc-p->nBuf<nByte ){
    u8 *aNew;
    i64 nNew = p->nAlloc ? p->nAlloc : 128;
    do {
      nNew = nNew*2;
    }while( (nNew-p->nBuf)<nByte );

    aNew = (u8 *)sqlite3_realloc64(p->aBuf, nNew);
    if( 0==aNew ){
      *pRc = SQLITE_NOMEM;
    }else{
      p->aBuf = aNew;
      p->nAlloc = nNew;
    }
  }
................................................................................
          }else if( p->op!=SQLITE_INSERT ){
            rc = sessionAppendDelete(&buf, bPatchset, p, nCol, abPK);
          }
          if( rc==SQLITE_OK ){
            rc = sqlite3_reset(pSel);
          }

          /* If the buffer is now larger than sessions_strm_chunk_size, pass
          ** its contents to the xOutput() callback. */
          if( xOutput 
           && rc==SQLITE_OK 
           && buf.nBuf>nNoop 
           && buf.nBuf>sessions_strm_chunk_size 
          ){
            rc = xOutput(pOut, (void*)buf.aBuf, buf.nBuf);
            nNoop = -1;
            buf.nBuf = 0;
          }

        }
................................................................................
** Do the work for either sqlite3changeset_start() or start_strm().
*/
static int sessionChangesetStart(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int nChangeset,                 /* Size of buffer pChangeset in bytes */
  void *pChangeset,               /* Pointer to buffer containing changeset */
  int bInvert                     /* True to invert changeset */
){
  sqlite3_changeset_iter *pRet;   /* Iterator to return */
  int nByte;                      /* Number of bytes to allocate for iterator */

  assert( xInput==0 || (pChangeset==0 && nChangeset==0) );

  /* Zero the output variable in case an error occurs. */
................................................................................
  if( !pRet ) return SQLITE_NOMEM;
  memset(pRet, 0, sizeof(sqlite3_changeset_iter));
  pRet->in.aData = (u8 *)pChangeset;
  pRet->in.nData = nChangeset;
  pRet->in.xInput = xInput;
  pRet->in.pIn = pIn;
  pRet->in.bEof = (xInput ? 0 : 1);
  pRet->bInvert = bInvert;

  /* Populate the output variable and return success. */
  *pp = pRet;
  return SQLITE_OK;
}

/*
................................................................................
** Create an iterator used to iterate through the contents of a changeset.
*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int nChangeset,                 /* Size of buffer pChangeset in bytes */
  void *pChangeset                /* Pointer to buffer containing changeset */
){
  return sessionChangesetStart(pp, 0, 0, nChangeset, pChangeset, 0);
}
SQLITE_API int sqlite3changeset_start_v2(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int nChangeset,                 /* Size of buffer pChangeset in bytes */
  void *pChangeset,               /* Pointer to buffer containing changeset */
  int flags
){
  int bInvert = !!(flags & SQLITE_CHANGESETSTART_INVERT);
  return sessionChangesetStart(pp, 0, 0, nChangeset, pChangeset, bInvert);
}

/*
** Streaming version of sqlite3changeset_start().
*/
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn
){
  return sessionChangesetStart(pp, xInput, pIn, 0, 0, 0);
}
SQLITE_API int sqlite3changeset_start_v2_strm(
  sqlite3_changeset_iter **pp,    /* OUT: Changeset iterator handle */
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int flags
){
  int bInvert = !!(flags & SQLITE_CHANGESETSTART_INVERT);
  return sessionChangesetStart(pp, xInput, pIn, 0, 0, bInvert);
}

/*
** If the SessionInput object passed as the only argument is a streaming
** object and the buffer is full, discard some data to free up space.
*/
static void sessionDiscardData(SessionInput *pIn){
  if( pIn->xInput && pIn->iNext>=sessions_strm_chunk_size ){
    int nMove = pIn->buf.nBuf - pIn->iNext;
    assert( nMove>=0 );
    if( nMove>0 ){
      memmove(pIn->buf.aBuf, &pIn->buf.aBuf[pIn->iNext], nMove);
    }
    pIn->buf.nBuf -= pIn->iNext;
    pIn->iNext = 0;
................................................................................
**
** Return an SQLite error code if an error occurs, or SQLITE_OK otherwise.
*/
static int sessionInputBuffer(SessionInput *pIn, int nByte){
  int rc = SQLITE_OK;
  if( pIn->xInput ){
    while( !pIn->bEof && (pIn->iNext+nByte)>=pIn->nData && rc==SQLITE_OK ){
      int nNew = sessions_strm_chunk_size;

      if( pIn->bNoDiscard==0 ) sessionDiscardData(pIn);
      if( SQLITE_OK==sessionBufferGrow(&pIn->buf, nNew, &rc) ){
        rc = pIn->xInput(pIn->pIn, &pIn->buf.aBuf[pIn->buf.nBuf], &nNew);
        if( nNew==0 ){
          pIn->bEof = 1;
        }else{
................................................................................
    if( sessionChangesetReadTblhdr(p) ) return p->rc;
    if( (p->rc = sessionInputBuffer(&p->in, 2)) ) return p->rc;
    p->in.iCurrent = p->in.iNext;
    if( p->in.iNext>=p->in.nData ) return SQLITE_DONE;
    op = p->in.aData[p->in.iNext++];
  }

  if( p->zTab==0 || (p->bPatchset && p->bInvert) ){
    /* The first record in the changeset is not a table header. Must be a
    ** corrupt changeset. */
    assert( p->in.iNext==1 || p->zTab );
    return (p->rc = SQLITE_CORRUPT_BKPT);
  }

  p->op = op;
  p->bIndirect = p->in.aData[p->in.iNext++];
  if( p->op!=SQLITE_UPDATE && p->op!=SQLITE_DELETE && p->op!=SQLITE_INSERT ){
    return (p->rc = SQLITE_CORRUPT_BKPT);
................................................................................
      nVal = p->nCol;
    }
    p->rc = sessionChangesetBufferRecord(&p->in, nVal, pnRec);
    if( p->rc!=SQLITE_OK ) return p->rc;
    *paRec = &p->in.aData[p->in.iNext];
    p->in.iNext += *pnRec;
  }else{
    sqlite3_value **apOld = (p->bInvert ? &p->apValue[p->nCol] : p->apValue);
    sqlite3_value **apNew = (p->bInvert ? p->apValue : &p->apValue[p->nCol]);

    /* If this is an UPDATE or DELETE, read the old.* record. */
    if( p->op!=SQLITE_INSERT && (p->bPatchset==0 || p->op==SQLITE_DELETE) ){
      u8 *abPK = p->bPatchset ? p->abPK : 0;
      p->rc = sessionReadRecord(&p->in, p->nCol, abPK, apOld);
      if( p->rc!=SQLITE_OK ) return p->rc;
    }

    /* If this is an INSERT or UPDATE, read the new.* record. */
    if( p->op!=SQLITE_DELETE ){
      p->rc = sessionReadRecord(&p->in, p->nCol, 0, apNew);
      if( p->rc!=SQLITE_OK ) return p->rc;
    }

    if( (p->bPatchset || p->bInvert) && p->op==SQLITE_UPDATE ){
      /* If this is an UPDATE that is part of a patchset, then all PK and
      ** modified fields are present in the new.* record. The old.* record
      ** is currently completely empty. This block shifts the PK fields from
      ** new.* to old.*, to accommodate the code that reads these arrays.  */
      for(i=0; i<p->nCol; i++){
        assert( p->bPatchset==0 || p->apValue[i]==0 );
        if( p->abPK[i] ){
          assert( p->apValue[i]==0 );
          p->apValue[i] = p->apValue[i+p->nCol];
          if( p->apValue[i]==0 ) return (p->rc = SQLITE_CORRUPT_BKPT);
          p->apValue[i+p->nCol] = 0;
        }
      }
    }else if( p->bInvert ){
      if( p->op==SQLITE_INSERT ) p->op = SQLITE_DELETE;
      else if( p->op==SQLITE_DELETE ) p->op = SQLITE_INSERT;
    }
  }

  return SQLITE_ROW;
}

/*
................................................................................

      default:
        rc = SQLITE_CORRUPT_BKPT;
        goto finished_invert;
    }

    assert( rc==SQLITE_OK );
    if( xOutput && sOut.nBuf>=sessions_strm_chunk_size ){
      rc = xOutput(pOut, sOut.aBuf, sOut.nBuf);
      sOut.nBuf = 0;
      if( rc!=SQLITE_OK ) goto finished_invert;
    }
  }

  assert( rc==SQLITE_OK );
................................................................................
  int nCol;                       /* Size of azCol[] and abPK[] arrays */
  const char **azCol;             /* Array of column names */
  u8 *abPK;                       /* Boolean array - true if column is in PK */
  int bStat1;                     /* True if table is sqlite_stat1 */
  int bDeferConstraints;          /* True to defer constraints */
  SessionBuffer constraints;      /* Deferred constraints are stored here */
  SessionBuffer rebase;           /* Rebase information (if any) here */
  u8 bRebaseStarted;              /* If table header is already in rebase */
  u8 bRebase;                     /* True to collect rebase information */
};

/*
** Formulate a statement to DELETE a row from database db. Assuming a table
** structure like this:
**
**     CREATE TABLE x(a, b, c, d, PRIMARY KEY(a, c));
................................................................................
*/
static int sessionRebaseAdd(
  SessionApplyCtx *p,             /* Apply context */
  int eType,                      /* Conflict resolution (OMIT or REPLACE) */
  sqlite3_changeset_iter *pIter   /* Iterator pointing at current change */
){
  int rc = SQLITE_OK;
  if( p->bRebase ){
    int i;
    int eOp = pIter->op;
    if( p->bRebaseStarted==0 ){
      /* Append a table-header to the rebase buffer */
      const char *zTab = pIter->zTab;
      sessionAppendByte(&p->rebase, 'T', &rc);
      sessionAppendVarint(&p->rebase, p->nCol, &rc);
      sessionAppendBlob(&p->rebase, p->abPK, p->nCol, &rc);
      sessionAppendBlob(&p->rebase, (u8*)zTab, (int)strlen(zTab)+1, &rc);
      p->bRebaseStarted = 1;
    }

    assert( eType==SQLITE_CHANGESET_REPLACE||eType==SQLITE_CHANGESET_OMIT );
    assert( eOp==SQLITE_DELETE || eOp==SQLITE_INSERT || eOp==SQLITE_UPDATE );

    sessionAppendByte(&p->rebase, 
        (eOp==SQLITE_DELETE ? SQLITE_DELETE : SQLITE_INSERT), &rc
        );
    sessionAppendByte(&p->rebase, (eType==SQLITE_CHANGESET_REPLACE), &rc);
    for(i=0; i<p->nCol; i++){
      sqlite3_value *pVal = 0;
      if( eOp==SQLITE_DELETE || (eOp==SQLITE_UPDATE && p->abPK[i]) ){
        sqlite3changeset_old(pIter, i, &pVal);
      }else{
        sqlite3changeset_new(pIter, i, &pVal);
      }
      sessionAppendValue(&p->rebase, pVal, &rc);
    }
  }
  return rc;
}

/*
** Invoke the conflict handler for the change that the changeset iterator
** currently points to.
**
................................................................................
  int rc = SQLITE_OK;

  while( pApply->constraints.nBuf ){
    sqlite3_changeset_iter *pIter2 = 0;
    SessionBuffer cons = pApply->constraints;
    memset(&pApply->constraints, 0, sizeof(SessionBuffer));

    rc = sessionChangesetStart(&pIter2, 0, 0, cons.nBuf, cons.aBuf, 0);
    if( rc==SQLITE_OK ){
      int nByte = 2*pApply->nCol*sizeof(sqlite3_value*);
      int rc2;
      pIter2->bPatchset = bPatchset;
      pIter2->zTab = (char*)zTab;
      pIter2->nCol = pApply->nCol;
      pIter2->abPK = pApply->abPK;
................................................................................
  SessionApplyCtx sApply;         /* changeset_apply() context object */
  int bPatchset;

  assert( xConflict!=0 );

  pIter->in.bNoDiscard = 1;
  memset(&sApply, 0, sizeof(sApply));
  sApply.bRebase = (ppRebase && pnRebase);
  sqlite3_mutex_enter(sqlite3_db_mutex(db));
  if( (flags & SQLITE_CHANGESETAPPLY_NOSAVEPOINT)==0 ){
    rc = sqlite3_exec(db, "SAVEPOINT changeset_apply", 0, 0, 0);
  }
  if( rc==SQLITE_OK ){
    rc = sqlite3_exec(db, "PRAGMA defer_foreign_keys = 1", 0, 0, 0);
  }
................................................................................
      rc = sqlite3_exec(db, "RELEASE changeset_apply", 0, 0, 0);
    }else{
      sqlite3_exec(db, "ROLLBACK TO changeset_apply", 0, 0, 0);
      sqlite3_exec(db, "RELEASE changeset_apply", 0, 0, 0);
    }
  }

  assert( sApply.bRebase || sApply.rebase.nBuf==0 );
  if( rc==SQLITE_OK && bPatchset==0 && sApply.bRebase ){
    *ppRebase = (void*)sApply.rebase.aBuf;
    *pnRebase = sApply.rebase.nBuf;
    sApply.rebase.aBuf = 0;
  }
  sqlite3_finalize(sApply.pInsert);
  sqlite3_finalize(sApply.pDelete);
  sqlite3_finalize(sApply.pUpdate);
................................................................................
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase,
  int flags
){
  sqlite3_changeset_iter *pIter;  /* Iterator to skip through changeset */  
  int bInverse = !!(flags & SQLITE_CHANGESETAPPLY_INVERT);
  int rc = sessionChangesetStart(&pIter, 0, 0, nChangeset, pChangeset,bInverse);
  if( rc==SQLITE_OK ){
    rc = sessionChangesetApply(
        db, pIter, xFilter, xConflict, pCtx, ppRebase, pnRebase, flags
    );
  }
  return rc;
}
................................................................................
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase,
  int flags
){
  sqlite3_changeset_iter *pIter;  /* Iterator to skip through changeset */  
  int bInverse = !!(flags & SQLITE_CHANGESETAPPLY_INVERT);
  int rc = sessionChangesetStart(&pIter, xInput, pIn, 0, 0, bInverse);
  if( rc==SQLITE_OK ){
    rc = sessionChangesetApply(
        db, pIter, xFilter, xConflict, pCtx, ppRebase, pnRebase, flags
    );
  }
  return rc;
}
................................................................................
    sessionAppendTableHdr(&buf, pGrp->bPatch, pTab, &rc);
    for(i=0; i<pTab->nChange; i++){
      SessionChange *p;
      for(p=pTab->apChange[i]; p; p=p->pNext){
        sessionAppendByte(&buf, p->op, &rc);
        sessionAppendByte(&buf, p->bIndirect, &rc);
        sessionAppendBlob(&buf, p->aRecord, p->nRecord, &rc);



        if( rc==SQLITE_OK && xOutput && buf.nBuf>=sessions_strm_chunk_size ){
          rc = xOutput(pOut, buf.aBuf, buf.nBuf);
          buf.nBuf = 0;
        }
      }
    }
  }

  if( rc==SQLITE_OK ){
    if( xOutput ){
      if( buf.nBuf>0 ) rc = xOutput(pOut, buf.aBuf, buf.nBuf);
    }else{
      *ppOut = buf.aBuf;
................................................................................
    }

    if( bDone==0 ){
      sessionAppendByte(&sOut, pIter->op, &rc);
      sessionAppendByte(&sOut, pIter->bIndirect, &rc);
      sessionAppendBlob(&sOut, aRec, nRec, &rc);
    }
    if( rc==SQLITE_OK && xOutput && sOut.nBuf>sessions_strm_chunk_size ){
      rc = xOutput(pOut, sOut.aBuf, sOut.nBuf);
      sOut.nBuf = 0;
    }
    if( rc ) break;
  }

  if( rc!=SQLITE_OK ){
................................................................................
*/
SQLITE_API void sqlite3rebaser_delete(sqlite3_rebaser *p){
  if( p ){
    sessionDeleteTable(p->grp.pList);
    sqlite3_free(p);
  }
}

/* 
** Global configuration
*/
SQLITE_API int sqlite3session_config(int op, void *pArg){
  int rc = SQLITE_OK;
  switch( op ){
    case SQLITE_SESSION_CONFIG_STRMSIZE: {
      int *pInt = (int*)pArg;
      if( *pInt>0 ){
        sessions_strm_chunk_size = *pInt;
      }
      *pInt = sessions_strm_chunk_size;
      break;
    }
    default:
      rc = SQLITE_MISUSE;
      break;
  }
  return rc;
}

#endif /* SQLITE_ENABLE_SESSION && SQLITE_ENABLE_PREUPDATE_HOOK */

/************** End of sqlite3session.c **************************************/
/************** Begin file fts5.c ********************************************/


................................................................................
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
/* #include <stdio.h> */
/* #include <assert.h> */
/************ Begin %include sections from the grammar ************************/

/* #include "fts5Int.h" */
/* #include "fts5parse.h" */

/*
** Disable all error recovery processing in the parser push-down
................................................................................
             fts5yyTracePrompt,fts5yyTokenName[fts5yymajor]);
        }
#endif
        fts5yy_destructor(fts5yypParser, (fts5YYCODETYPE)fts5yymajor, &fts5yyminorunion);
        fts5yymajor = fts5YYNOCODE;
      }else{
        while( fts5yypParser->fts5yytos >= fts5yypParser->fts5yystack

            && (fts5yyact = fts5yy_find_reduce_action(
                        fts5yypParser->fts5yytos->stateno,
                        fts5YYERRORSYMBOL)) > fts5YY_MAX_SHIFTREDUCE
        ){
          fts5yy_pop_parser_stack(fts5yypParser);
        }
        if( fts5yypParser->fts5yytos < fts5yypParser->fts5yystack || fts5yymajor==0 ){
          fts5yy_destructor(fts5yypParser,(fts5YYCODETYPE)fts5yymajor,&fts5yyminorunion);
          fts5yy_parse_failed(fts5yypParser);
#ifndef fts5YYNOERRORRECOVERY
................................................................................

    if( p->rc ){
      sqlite3Fts5IterClose((Fts5IndexIter*)pRet);
      pRet = 0;
      fts5CloseReader(p);
    }

    *ppIter = (Fts5IndexIter*)pRet;
    sqlite3Fts5BufferFree(&buf);
  }
  return fts5IndexReturn(p);
}

/*
** Return true if the iterator passed as the only argument is at EOF.
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238b4f9", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){
  static const char *azName[] = {
    "config", "content", "data", "docsize", "idx"
  };
  unsigned int i;
  for(i=0; i<sizeof(azName)/sizeof(azName[0]); i++){
    if( sqlite3_stricmp(zName, azName[i])==0 ) return 1;
  }
  return 0;
}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 3,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
    /* xBestIndex    */ fts5BestIndexMethod,
    /* xDisconnect   */ fts5DisconnectMethod,
    /* xDestroy      */ fts5DestroyMethod,
    /* xOpen         */ fts5OpenMethod,
    /* xClose        */ fts5CloseMethod,
................................................................................
    /* xCommit       */ fts5CommitMethod,
    /* xRollback     */ fts5RollbackMethod,
    /* xFindFunction */ fts5FindFunctionMethod,
    /* xRename       */ fts5RenameMethod,
    /* xSavepoint    */ fts5SavepointMethod,
    /* xRelease      */ fts5ReleaseMethod,
    /* xRollbackTo   */ fts5RollbackToMethod,
    /* xShadowName   */ fts5ShadowName
  };

  int rc;
  Fts5Global *pGlobal = 0;

  pGlobal = (Fts5Global*)sqlite3_malloc(sizeof(Fts5Global));
  if( pGlobal==0 ){
................................................................................
static int fts5VocabInstanceNext(Fts5VocabCursor *pCsr){
  int eDetail = pCsr->pConfig->eDetail;
  int rc = SQLITE_OK;
  Fts5IndexIter *pIter = pCsr->pIter;
  i64 *pp = &pCsr->iInstPos;
  int *po = &pCsr->iInstOff;
  
  assert( sqlite3Fts5IterEof(pIter)==0 );
  assert( pCsr->bEof==0 );
  while( eDetail==FTS5_DETAIL_NONE
      || sqlite3Fts5PoslistNext64(pIter->pData, pIter->nData, po, pp) 
  ){
    pCsr->iInstPos = 0;
    pCsr->iInstOff = 0;

    rc = sqlite3Fts5IterNextScan(pCsr->pIter);
    if( rc==SQLITE_OK ){
      rc = fts5VocabInstanceNewTerm(pCsr);
      if( pCsr->bEof || eDetail==FTS5_DETAIL_NONE ) break;
    }
    if( rc ){
      pCsr->bEof = 1;
      break;
    }
  }

................................................................................
    /* xCommit       */ 0,
    /* xRollback     */ 0,
    /* xFindFunction */ 0,
    /* xRename       */ 0,
    /* xSavepoint    */ 0,
    /* xRelease      */ 0,
    /* xRollbackTo   */ 0,
    /* xShadowName   */ 0
  };
  void *p = (void*)pGlobal;

  return sqlite3_create_module_v2(db, "fts5vocab", &fts5Vocab, p, 0);
}




    
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) */

/************** End of fts5.c ************************************************/
/************** Begin file stmt.c ********************************************/
................................................................................
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
  0,                         /* xSavepoint */
  0,                         /* xRelease */
  0,                         /* xRollbackTo */
  0,                         /* xShadowName */
};

#endif /* SQLITE_OMIT_VIRTUALTABLE */

SQLITE_PRIVATE int sqlite3StmtVtabInit(sqlite3 *db){
  int rc = SQLITE_OK;
#ifndef SQLITE_OMIT_VIRTUALTABLE
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=220527
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238alt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/

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** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.3"
#define SQLITE_VERSION_NUMBER 3025003
#define SQLITE_SOURCE_ID      "2018-11-05 20:37:38 89e099fbe5e13c33e683bef07361231ca525b88f7907be7092058007b75036f2"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_db_config()] to make sure that
** the call worked.  ^The [sqlite3_db_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>

** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
** <dd> ^This option takes three additional arguments that determine the 
** [lookaside memory allocator] configuration for the [database connection].
** ^The first argument (the third parameter to [sqlite3_db_config()] is a
** pointer to a memory buffer to use for lookaside memory.
** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
** may be NULL in which case SQLite will allocate the
................................................................................
** connection is not currently using lookaside memory, or in other words
** when the "current value" returned by
** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
** Any attempt to change the lookaside memory configuration when lookaside
** memory is in use leaves the configuration unchanged and returns 
** [SQLITE_BUSY].)^</dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
** <dd> ^This option is used to enable or disable the enforcement of
** [foreign key constraints].  There should be two additional arguments.
** The first argument is an integer which is 0 to disable FK enforcement,
** positive to enable FK enforcement or negative to leave FK enforcement
** unchanged.  The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether FK enforcement is off or on
** following this call.  The second parameter may be a NULL pointer, in
** which case the FK enforcement setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable triggers,
** positive to enable triggers or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether triggers are disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the trigger setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</dt>
** <dd> ^This option is used to enable or disable the two-argument
** version of the [fts3_tokenizer()] function which is part of the
** [FTS3] full-text search engine extension.
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable fts3_tokenizer() or
** positive to enable fts3_tokenizer() or negative to leave the setting
** unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether fts3_tokenizer is disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the new setting is not reported back. </dd>
**

** <dt>SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION</dt>
** <dd> ^This option is used to enable or disable the [sqlite3_load_extension()]
** interface independently of the [load_extension()] SQL function.
** The [sqlite3_enable_load_extension()] API enables or disables both the
** C-API [sqlite3_load_extension()] and the SQL function [load_extension()].
** There should be two additional arguments.
** When the first argument to this interface is 1, then only the C-API is
................................................................................
** C-API or the SQL function.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether [sqlite3_load_extension()] interface
** is disabled or enabled following this call.  The second parameter may
** be a NULL pointer, in which case the new setting is not reported back.
** </dd>
**
** <dt>SQLITE_DBCONFIG_MAINDBNAME</dt>
** <dd> ^This option is used to change the name of the "main" database
** schema.  ^The sole argument is a pointer to a constant UTF8 string
** which will become the new schema name in place of "main".  ^SQLite
** does not make a copy of the new main schema name string, so the application
** must ensure that the argument passed into this DBCONFIG option is unchanged
** until after the database connection closes.
** </dd>
**

** <dt>SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</dt>
** <dd> Usually, when a database in wal mode is closed or detached from a 
** database handle, SQLite checks if this will mean that there are now no 
** connections at all to the database. If so, it performs a checkpoint 
** operation before closing the connection. This option may be used to
** override this behaviour. The first parameter passed to this operation
** is an integer - positive to disable checkpoints-on-close, or zero (the
** default) to enable them, and negative to leave the setting unchanged.
** The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>^(The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].)^ The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
................................................................................
** The first argument to this setting is an integer which is 0 to disable 
** the QPSG, positive to enable QPSG, or negative to leave the setting
** unchanged. The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether the QPSG is disabled or enabled
** following this call.
** </dd>
**
** <dt>SQLITE_DBCONFIG_TRIGGER_EQP</dt>
** <dd> By default, the output of EXPLAIN QUERY PLAN commands does not 
** include output for any operations performed by trigger programs. This
** option is used to set or clear (the default) a flag that governs this
** behavior. The first parameter passed to this operation is an integer -
** positive to enable output for trigger programs, or zero to disable it,
** or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which is written 
** 0 or 1 to indicate whether output-for-triggers has been disabled - 0 if 
** it is not disabled, 1 if it is.  
** </dd>
**
** <dt>SQLITE_DBCONFIG_RESET_DATABASE</dt>
** <dd> Set the SQLITE_DBCONFIG_RESET_DATABASE flag and then run
** [VACUUM] in order to reset a database back to an empty database
** with no schema and no content. The following process works even for
** a badly corrupted database file:
** <ol>
** <li> If the database connection is newly opened, make sure it has read the
**      database schema by preparing then discarding some query against the
................................................................................
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
** <li> [sqlite3_exec](db, "[VACUUM]", 0, 0, 0);
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
** </ol>
** Because resetting a database is destructive and irreversible, the
** process requires the use of this obscure API and multiple steps to help
** ensure that it does not happen by accident.












** </dd>
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */
#define SQLITE_DBCONFIG_TRIGGER_EQP           1008 /* int int* */
#define SQLITE_DBCONFIG_RESET_DATABASE        1009 /* int int* */

#define SQLITE_DBCONFIG_MAX                   1009 /* Largest DBCONFIG */

/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
................................................................................
** probably reused many times.)^ ^Without this flag, [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()] assume that the prepared statement will 
** be used just once or at most a few times and then destroyed using
** [sqlite3_finalize()] relatively soon. The current implementation acts
** on this hint by avoiding the use of [lookaside memory] so as not to
** deplete the limited store of lookaside memory. Future versions of
** SQLite may act on this hint differently.









** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01


/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
................................................................................
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.





**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
** the original string, "SELECT $abc,:xyz" but sqlite3_expanded_sql()
** will return "SELECT 2345,NULL".)^
**
................................................................................
** is available to hold the result, or if the result would exceed the
** the maximum string length determined by the [SQLITE_LIMIT_LENGTH].
**
** ^The [SQLITE_TRACE_SIZE_LIMIT] compile-time option limits the size of
** bound parameter expansions.  ^The [SQLITE_OMIT_TRACE] compile-time
** option causes sqlite3_expanded_sql() to always return NULL.
**
** ^The string returned by sqlite3_sql(P) is managed by SQLite and is
** automatically freed when the prepared statement is finalized.

** ^The string returned by sqlite3_expanded_sql(P), on the other hand,
** is obtained from [sqlite3_malloc()] and must be free by the application
** by passing it to [sqlite3_free()].
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt);
SQLITE_API char *sqlite3_expanded_sql(sqlite3_stmt *pStmt);


/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
................................................................................
                       void **ppArg);
  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
  /* The methods above are in version 1 of the sqlite_module object. Those 
  ** below are for version 2 and greater. */
  int (*xSavepoint)(sqlite3_vtab *pVTab, int);
  int (*xRelease)(sqlite3_vtab *pVTab, int);
  int (*xRollbackTo)(sqlite3_vtab *pVTab, int);



};

/*
** CAPI3REF: Virtual Table Indexing Information
** KEYWORDS: sqlite3_index_info
**
** The sqlite3_index_info structure and its substructures is used as part
................................................................................
#define SQLITE_TESTCTRL_PENDING_BYTE            11
#define SQLITE_TESTCTRL_ASSERT                  12
#define SQLITE_TESTCTRL_ALWAYS                  13
#define SQLITE_TESTCTRL_RESERVE                 14
#define SQLITE_TESTCTRL_OPTIMIZATIONS           15
#define SQLITE_TESTCTRL_ISKEYWORD               16  /* NOT USED */
#define SQLITE_TESTCTRL_SCRATCHMALLOC           17  /* NOT USED */

#define SQLITE_TESTCTRL_LOCALTIME_FAULT         18
#define SQLITE_TESTCTRL_EXPLAIN_STMT            19  /* NOT USED */
#define SQLITE_TESTCTRL_ONCE_RESET_THRESHOLD    19
#define SQLITE_TESTCTRL_NEVER_CORRUPT           20
#define SQLITE_TESTCTRL_VDBE_COVERAGE           21
#define SQLITE_TESTCTRL_BYTEORDER               22
#define SQLITE_TESTCTRL_ISINIT                  23
................................................................................
** CAPI3REF: Virtual Table Configuration Options
**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>

** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
................................................................................
  unsigned int *anQueue;            /* Number of pending entries in the queue */
  int nCoord;                       /* Number of coordinates */
  int iLevel;                       /* Level of current node or entry */
  int mxLevel;                      /* The largest iLevel value in the tree */
  sqlite3_int64 iRowid;             /* Rowid for current entry */
  sqlite3_rtree_dbl rParentScore;   /* Score of parent node */
  int eParentWithin;                /* Visibility of parent node */
  int eWithin;                      /* OUT: Visiblity */
  sqlite3_rtree_dbl rScore;         /* OUT: Write the score here */
  /* The following fields are only available in 3.8.11 and later */
  sqlite3_value **apSqlParam;       /* Original SQL values of parameters */
};

/*
** Allowed values for sqlite3_rtree_query.eWithin and .eParentWithin.
................................................................................
** [sqlite3changeset_invert()] functions, all changes within the changeset 
** that apply to a single table are grouped together. This means that when 
** an application iterates through a changeset using an iterator created by 
** this function, all changes that relate to a single table are visited 
** consecutively. There is no chance that the iterator will visit a change 
** the applies to table X, then one for table Y, and then later on visit 
** another change for table X.







*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset                /* Pointer to blob containing changeset */
);





















/*
** CAPI3REF: Advance A Changeset Iterator
** METHOD: sqlite3_changeset_iter
**
** This function may only be used with iterators created by function
................................................................................
  int(*xConflict)(
    void *pCtx,                   /* Copy of sixth arg to _apply() */
    int eConflict,                /* DATA, MISSING, CONFLICT, CONSTRAINT */
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase, /* OUT: Rebase data */
  int flags                       /* Combination of SESSION_APPLY_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_apply_v2
**
** The following flags may passed via the 9th parameter to
** [sqlite3changeset_apply_v2] and [sqlite3changeset_apply_v2_strm]:
................................................................................
**   Usually, the sessions module encloses all operations performed by
**   a single call to apply_v2() or apply_v2_strm() in a [SAVEPOINT]. The
**   SAVEPOINT is committed if the changeset or patchset is successfully
**   applied, or rolled back if an error occurs. Specifying this flag
**   causes the sessions module to omit this savepoint. In this case, if the
**   caller has an open transaction or savepoint when apply_v2() is called, 
**   it may revert the partially applied changeset by rolling it back.





*/
#define SQLITE_CHANGESETAPPLY_NOSAVEPOINT   0x0001


/* 
** CAPI3REF: Constants Passed To The Conflict Handler
**
** Values that may be passed as the second argument to a conflict-handler.
**
** <dl>
................................................................................
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn






);
SQLITE_API int sqlite3session_changeset_strm(
  sqlite3_session *pSession,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3session_patchset_strm(
................................................................................
  sqlite3_rebaser *pRebaser,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);









































/*
** Make sure we can call this stuff from C++.
*/
#ifdef __cplusplus
}
#endif







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2119
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2123
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....
2129
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....
2160
2161
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2165
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2169
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2174
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2178
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2200
....
3624
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3649
3650
....
3794
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3808
3809
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....
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....
6313
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6321
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....
7238
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7249
7250
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7252
....
8651
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8660
8661
8662
8663
8664
8665
....
9421
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9435
....
9917
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.....
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.....
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.....
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.....
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11101
11102
11103
11104
11105
11106
** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.26.0"
#define SQLITE_VERSION_NUMBER 3026000
#define SQLITE_SOURCE_ID      "2018-12-01 12:34:55 bf8c1b2b7a5960c282e543b9c293686dccff272512d08865f4600fb58238b4f9"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_db_config()] to make sure that
** the call worked.  ^The [sqlite3_db_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>
** [[SQLITE_DBCONFIG_LOOKASIDE]]
** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
** <dd> ^This option takes three additional arguments that determine the 
** [lookaside memory allocator] configuration for the [database connection].
** ^The first argument (the third parameter to [sqlite3_db_config()] is a
** pointer to a memory buffer to use for lookaside memory.
** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
** may be NULL in which case SQLite will allocate the
................................................................................
** connection is not currently using lookaside memory, or in other words
** when the "current value" returned by
** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
** Any attempt to change the lookaside memory configuration when lookaside
** memory is in use leaves the configuration unchanged and returns 
** [SQLITE_BUSY].)^</dd>
**
** [[SQLITE_DBCONFIG_ENABLE_FKEY]]
** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
** <dd> ^This option is used to enable or disable the enforcement of
** [foreign key constraints].  There should be two additional arguments.
** The first argument is an integer which is 0 to disable FK enforcement,
** positive to enable FK enforcement or negative to leave FK enforcement
** unchanged.  The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether FK enforcement is off or on
** following this call.  The second parameter may be a NULL pointer, in
** which case the FK enforcement setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_TRIGGER]]
** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable triggers,
** positive to enable triggers or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether triggers are disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the trigger setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER]]
** <dt>SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER</dt>
** <dd> ^This option is used to enable or disable the two-argument
** version of the [fts3_tokenizer()] function which is part of the
** [FTS3] full-text search engine extension.
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable fts3_tokenizer() or
** positive to enable fts3_tokenizer() or negative to leave the setting
** unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether fts3_tokenizer is disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the new setting is not reported back. </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION]]
** <dt>SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION</dt>
** <dd> ^This option is used to enable or disable the [sqlite3_load_extension()]
** interface independently of the [load_extension()] SQL function.
** The [sqlite3_enable_load_extension()] API enables or disables both the
** C-API [sqlite3_load_extension()] and the SQL function [load_extension()].
** There should be two additional arguments.
** When the first argument to this interface is 1, then only the C-API is
................................................................................
** C-API or the SQL function.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether [sqlite3_load_extension()] interface
** is disabled or enabled following this call.  The second parameter may
** be a NULL pointer, in which case the new setting is not reported back.
** </dd>
**
** [[SQLITE_DBCONFIG_MAINDBNAME]] <dt>SQLITE_DBCONFIG_MAINDBNAME</dt>
** <dd> ^This option is used to change the name of the "main" database
** schema.  ^The sole argument is a pointer to a constant UTF8 string
** which will become the new schema name in place of "main".  ^SQLite
** does not make a copy of the new main schema name string, so the application
** must ensure that the argument passed into this DBCONFIG option is unchanged
** until after the database connection closes.
** </dd>
**
** [[SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE]] 
** <dt>SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE</dt>
** <dd> Usually, when a database in wal mode is closed or detached from a 
** database handle, SQLite checks if this will mean that there are now no 
** connections at all to the database. If so, it performs a checkpoint 
** operation before closing the connection. This option may be used to
** override this behaviour. The first parameter passed to this operation
** is an integer - positive to disable checkpoints-on-close, or zero (the
** default) to enable them, and negative to leave the setting unchanged.
** The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** [[SQLITE_DBCONFIG_ENABLE_QPSG]] <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>^(The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].)^ The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
................................................................................
** The first argument to this setting is an integer which is 0 to disable 
** the QPSG, positive to enable QPSG, or negative to leave the setting
** unchanged. The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether the QPSG is disabled or enabled
** following this call.
** </dd>
**
** [[SQLITE_DBCONFIG_TRIGGER_EQP]] <dt>SQLITE_DBCONFIG_TRIGGER_EQP</dt>
** <dd> By default, the output of EXPLAIN QUERY PLAN commands does not 
** include output for any operations performed by trigger programs. This
** option is used to set or clear (the default) a flag that governs this
** behavior. The first parameter passed to this operation is an integer -
** positive to enable output for trigger programs, or zero to disable it,
** or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which is written 
** 0 or 1 to indicate whether output-for-triggers has been disabled - 0 if 
** it is not disabled, 1 if it is.  
** </dd>
**
** [[SQLITE_DBCONFIG_RESET_DATABASE]] <dt>SQLITE_DBCONFIG_RESET_DATABASE</dt>
** <dd> Set the SQLITE_DBCONFIG_RESET_DATABASE flag and then run
** [VACUUM] in order to reset a database back to an empty database
** with no schema and no content. The following process works even for
** a badly corrupted database file:
** <ol>
** <li> If the database connection is newly opened, make sure it has read the
**      database schema by preparing then discarding some query against the
................................................................................
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
** <li> [sqlite3_exec](db, "[VACUUM]", 0, 0, 0);
** <li> sqlite3_db_config(db, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
** </ol>
** Because resetting a database is destructive and irreversible, the
** process requires the use of this obscure API and multiple steps to help
** ensure that it does not happen by accident.
**
** [[SQLITE_DBCONFIG_DEFENSIVE]] <dt>SQLITE_DBCONFIG_DEFENSIVE</dt>
** <dd>The SQLITE_DBCONFIG_DEFENSIVE option activates or deactivates the
** "defensive" flag for a database connection.  When the defensive
** flag is enabled, language features that allow ordinary SQL to 
** deliberately corrupt the database file are disabled.  The disabled
** features include but are not limited to the following:
** <ul>
** <li> The [PRAGMA writable_schema=ON] statement.
** <li> Writes to the [sqlite_dbpage] virtual table.
** <li> Direct writes to [shadow tables].
** </ul>
** </dd>
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */
#define SQLITE_DBCONFIG_TRIGGER_EQP           1008 /* int int* */
#define SQLITE_DBCONFIG_RESET_DATABASE        1009 /* int int* */
#define SQLITE_DBCONFIG_DEFENSIVE             1010 /* int int* */
#define SQLITE_DBCONFIG_MAX                   1010 /* Largest DBCONFIG */

/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
................................................................................
** probably reused many times.)^ ^Without this flag, [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()] assume that the prepared statement will 
** be used just once or at most a few times and then destroyed using
** [sqlite3_finalize()] relatively soon. The current implementation acts
** on this hint by avoiding the use of [lookaside memory] so as not to
** deplete the limited store of lookaside memory. Future versions of
** SQLite may act on this hint differently.
**
** [[SQLITE_PREPARE_NORMALIZE]] ^(<dt>SQLITE_PREPARE_NORMALIZE</dt>
** <dd>The SQLITE_PREPARE_NORMALIZE flag indicates that a normalized
** representation of the SQL statement should be calculated and then
** associated with the prepared statement, which can be obtained via
** the [sqlite3_normalized_sql()] interface.)^  The semantics used to
** normalize a SQL statement are unspecified and subject to change.
** At a minimum, literal values will be replaced with suitable
** placeholders.
** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01
#define SQLITE_PREPARE_NORMALIZE               0x02

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
................................................................................
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
** ^The sqlite3_normalized_sql(P) interface returns a pointer to a UTF-8
** string containing the normalized SQL text of prepared statement P.  The
** semantics used to normalize a SQL statement are unspecified and subject
** to change.  At a minimum, literal values will be replaced with suitable
** placeholders.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
** the original string, "SELECT $abc,:xyz" but sqlite3_expanded_sql()
** will return "SELECT 2345,NULL".)^
**
................................................................................
** is available to hold the result, or if the result would exceed the
** the maximum string length determined by the [SQLITE_LIMIT_LENGTH].
**
** ^The [SQLITE_TRACE_SIZE_LIMIT] compile-time option limits the size of
** bound parameter expansions.  ^The [SQLITE_OMIT_TRACE] compile-time
** option causes sqlite3_expanded_sql() to always return NULL.
**
** ^The strings returned by sqlite3_sql(P) and sqlite3_normalized_sql(P)
** are managed by SQLite and are automatically freed when the prepared
** statement is finalized.
** ^The string returned by sqlite3_expanded_sql(P), on the other hand,
** is obtained from [sqlite3_malloc()] and must be free by the application
** by passing it to [sqlite3_free()].
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt);
SQLITE_API char *sqlite3_expanded_sql(sqlite3_stmt *pStmt);
SQLITE_API const char *sqlite3_normalized_sql(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
** METHOD: sqlite3_stmt
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
................................................................................
                       void **ppArg);
  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
  /* The methods above are in version 1 of the sqlite_module object. Those 
  ** below are for version 2 and greater. */
  int (*xSavepoint)(sqlite3_vtab *pVTab, int);
  int (*xRelease)(sqlite3_vtab *pVTab, int);
  int (*xRollbackTo)(sqlite3_vtab *pVTab, int);
  /* The methods above are in versions 1 and 2 of the sqlite_module object.
  ** Those below are for version 3 and greater. */
  int (*xShadowName)(const char*);
};

/*
** CAPI3REF: Virtual Table Indexing Information
** KEYWORDS: sqlite3_index_info
**
** The sqlite3_index_info structure and its substructures is used as part
................................................................................
#define SQLITE_TESTCTRL_PENDING_BYTE            11
#define SQLITE_TESTCTRL_ASSERT                  12
#define SQLITE_TESTCTRL_ALWAYS                  13
#define SQLITE_TESTCTRL_RESERVE                 14
#define SQLITE_TESTCTRL_OPTIMIZATIONS           15
#define SQLITE_TESTCTRL_ISKEYWORD               16  /* NOT USED */
#define SQLITE_TESTCTRL_SCRATCHMALLOC           17  /* NOT USED */
#define SQLITE_TESTCTRL_INTERNAL_FUNCTIONS      17
#define SQLITE_TESTCTRL_LOCALTIME_FAULT         18
#define SQLITE_TESTCTRL_EXPLAIN_STMT            19  /* NOT USED */
#define SQLITE_TESTCTRL_ONCE_RESET_THRESHOLD    19
#define SQLITE_TESTCTRL_NEVER_CORRUPT           20
#define SQLITE_TESTCTRL_VDBE_COVERAGE           21
#define SQLITE_TESTCTRL_BYTEORDER               22
#define SQLITE_TESTCTRL_ISINIT                  23
................................................................................
** CAPI3REF: Virtual Table Configuration Options
**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>
** [[SQLITE_VTAB_CONSTRAINT_SUPPORT]]
** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
................................................................................
  unsigned int *anQueue;            /* Number of pending entries in the queue */
  int nCoord;                       /* Number of coordinates */
  int iLevel;                       /* Level of current node or entry */
  int mxLevel;                      /* The largest iLevel value in the tree */
  sqlite3_int64 iRowid;             /* Rowid for current entry */
  sqlite3_rtree_dbl rParentScore;   /* Score of parent node */
  int eParentWithin;                /* Visibility of parent node */
  int eWithin;                      /* OUT: Visibility */
  sqlite3_rtree_dbl rScore;         /* OUT: Write the score here */
  /* The following fields are only available in 3.8.11 and later */
  sqlite3_value **apSqlParam;       /* Original SQL values of parameters */
};

/*
** Allowed values for sqlite3_rtree_query.eWithin and .eParentWithin.
................................................................................
** [sqlite3changeset_invert()] functions, all changes within the changeset 
** that apply to a single table are grouped together. This means that when 
** an application iterates through a changeset using an iterator created by 
** this function, all changes that relate to a single table are visited 
** consecutively. There is no chance that the iterator will visit a change 
** the applies to table X, then one for table Y, and then later on visit 
** another change for table X.
**
** The behavior of sqlite3changeset_start_v2() and its streaming equivalent
** may be modified by passing a combination of
** [SQLITE_CHANGESETSTART_INVERT | supported flags] as the 4th parameter.
**
** Note that the sqlite3changeset_start_v2() API is still <b>experimental</b>
** and therefore subject to change.
*/
SQLITE_API int sqlite3changeset_start(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset                /* Pointer to blob containing changeset */
);
SQLITE_API int sqlite3changeset_start_v2(
  sqlite3_changeset_iter **pp,    /* OUT: New changeset iterator handle */
  int nChangeset,                 /* Size of changeset blob in bytes */
  void *pChangeset,               /* Pointer to blob containing changeset */
  int flags                       /* SESSION_CHANGESETSTART_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_start_v2
**
** The following flags may passed via the 4th parameter to
** [sqlite3changeset_start_v2] and [sqlite3changeset_start_v2_strm]:
**
** <dt>SQLITE_CHANGESETAPPLY_INVERT <dd>
**   Invert the changeset while iterating through it. This is equivalent to
**   inverting a changeset using sqlite3changeset_invert() before applying it.
**   It is an error to specify this flag with a patchset.
*/
#define SQLITE_CHANGESETSTART_INVERT        0x0002


/*
** CAPI3REF: Advance A Changeset Iterator
** METHOD: sqlite3_changeset_iter
**
** This function may only be used with iterators created by function
................................................................................
  int(*xConflict)(
    void *pCtx,                   /* Copy of sixth arg to _apply() */
    int eConflict,                /* DATA, MISSING, CONFLICT, CONSTRAINT */
    sqlite3_changeset_iter *p     /* Handle describing change and conflict */
  ),
  void *pCtx,                     /* First argument passed to xConflict */
  void **ppRebase, int *pnRebase, /* OUT: Rebase data */
  int flags                       /* SESSION_CHANGESETAPPLY_* flags */
);

/*
** CAPI3REF: Flags for sqlite3changeset_apply_v2
**
** The following flags may passed via the 9th parameter to
** [sqlite3changeset_apply_v2] and [sqlite3changeset_apply_v2_strm]:
................................................................................
**   Usually, the sessions module encloses all operations performed by
**   a single call to apply_v2() or apply_v2_strm() in a [SAVEPOINT]. The
**   SAVEPOINT is committed if the changeset or patchset is successfully
**   applied, or rolled back if an error occurs. Specifying this flag
**   causes the sessions module to omit this savepoint. In this case, if the
**   caller has an open transaction or savepoint when apply_v2() is called, 
**   it may revert the partially applied changeset by rolling it back.
**
** <dt>SQLITE_CHANGESETAPPLY_INVERT <dd>
**   Invert the changeset before applying it. This is equivalent to inverting
**   a changeset using sqlite3changeset_invert() before applying it. It is
**   an error to specify this flag with a patchset.
*/
#define SQLITE_CHANGESETAPPLY_NOSAVEPOINT   0x0001
#define SQLITE_CHANGESETAPPLY_INVERT        0x0002

/* 
** CAPI3REF: Constants Passed To The Conflict Handler
**
** Values that may be passed as the second argument to a conflict-handler.
**
** <dl>
................................................................................
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3changeset_start_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn
);
SQLITE_API int sqlite3changeset_start_v2_strm(
  sqlite3_changeset_iter **pp,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int flags
);
SQLITE_API int sqlite3session_changeset_strm(
  sqlite3_session *pSession,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);
SQLITE_API int sqlite3session_patchset_strm(
................................................................................
  sqlite3_rebaser *pRebaser,
  int (*xInput)(void *pIn, void *pData, int *pnData),
  void *pIn,
  int (*xOutput)(void *pOut, const void *pData, int nData),
  void *pOut
);

/*
** CAPI3REF: Configure global parameters
**
** The sqlite3session_config() interface is used to make global configuration
** changes to the sessions module in order to tune it to the specific needs 
** of the application.
**
** The sqlite3session_config() interface is not threadsafe. If it is invoked
** while any other thread is inside any other sessions method then the
** results are undefined. Furthermore, if it is invoked after any sessions
** related objects have been created, the results are also undefined. 
**
** The first argument to the sqlite3session_config() function must be one
** of the SQLITE_SESSION_CONFIG_XXX constants defined below. The 
** interpretation of the (void*) value passed as the second parameter and
** the effect of calling this function depends on the value of the first
** parameter.
**
** <dl>
** <dt>SQLITE_SESSION_CONFIG_STRMSIZE<dd>
**    By default, the sessions module streaming interfaces attempt to input
**    and output data in approximately 1 KiB chunks. This operand may be used
**    to set and query the value of this configuration setting. The pointer
**    passed as the second argument must point to a value of type (int).
**    If this value is greater than 0, it is used as the new streaming data
**    chunk size for both input and output. Before returning, the (int) value
**    pointed to by pArg is set to the final value of the streaming interface
**    chunk size.
** </dl>
**
** This function returns SQLITE_OK if successful, or an SQLite error code
** otherwise.
*/
SQLITE_API int sqlite3session_config(int op, void *pArg);

/*
** CAPI3REF: Values for sqlite3session_config().
*/
#define SQLITE_SESSION_CONFIG_STRMSIZE 1

/*
** Make sure we can call this stuff from C++.
*/
#ifdef __cplusplus
}
#endif