SQLite
Check-in [d56fac4031]
Not logged in
Overview
SHA1 Hash:d56fac40313e7d2e77dac3e2bc47cbbb3d10c656
Date: 2013-09-13 22:38:54
User: mistachkin
Comment:VSIX tooling changes to support Visual Studio 2013.
Tags And Properties
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Makefile.msc

466
467
468
469
470
471
472











473
474
475
476
477
478
479

# When compiling for use in the WinRT environment, the following
# linker option must be used to mark the executable as runnable
# only in the context of an application container.
#
!IF $(FOR_WINRT)!=0
LTLINKOPTS = $(LTLINKOPTS) /APPCONTAINER











!ENDIF

# If either debugging or symbols are enabled, enable PDBs.
!IF $(DEBUG)>0 || $(SYMBOLS)!=0
LDFLAGS = /DEBUG
!ENDIF








>
>
>
>
>
>
>
>
>
>
>







466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490

# When compiling for use in the WinRT environment, the following
# linker option must be used to mark the executable as runnable
# only in the context of an application container.
#
!IF $(FOR_WINRT)!=0
LTLINKOPTS = $(LTLINKOPTS) /APPCONTAINER
!IF "$(VISUALSTUDIOVERSION)"=="12.0"
!IF "$(PLATFORM)"=="x86"
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(VCINSTALLDIR)\lib\store"
!ELSEIF "$(PLATFORM)"=="x64"
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(VCINSTALLDIR)\lib\store\amd64"
!ELSEIF "$(PLATFORM)"=="ARM"
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(VCINSTALLDIR)\lib\store\arm"
!ELSE
LTLINKOPTS = $(LTLINKOPTS) "/LIBPATH:$(VCINSTALLDIR)\lib\store"
!ENDIF
!ENDIF
!ENDIF

# If either debugging or symbols are enabled, enable PDBs.
!IF $(DEBUG)>0 || $(SYMBOLS)!=0
LDFLAGS = /DEBUG
!ENDIF

Changes to src/attach.c

505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
  return 0;
}
int sqlite3FixExpr(
  DbFixer *pFix,     /* Context of the fixation */
  Expr *pExpr        /* The expression to be fixed to one database */
){
  while( pExpr ){
    if( ExprHasAnyProperty(pExpr, EP_TokenOnly) ) break;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
    }else{
      if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
    }
    if( sqlite3FixExpr(pFix, pExpr->pRight) ){
      return 1;







|







505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
  return 0;
}
int sqlite3FixExpr(
  DbFixer *pFix,     /* Context of the fixation */
  Expr *pExpr        /* The expression to be fixed to one database */
){
  while( pExpr ){
    if( ExprHasProperty(pExpr, EP_TokenOnly) ) break;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
    }else{
      if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
    }
    if( sqlite3FixExpr(pFix, pExpr->pRight) ){
      return 1;

Changes to src/expr.c

66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
..
81
82
83
84
85
86
87
88
89
90
91







92
93
94

95
96
97
98
99
100
101
...
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
...
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
...
727
728
729
730
731
732
733


734
735
736
737
738
739
740
741
742
743

744
745
746
747
748
749
750
...
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
...
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
....
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
....
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
....
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
....
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
....
2311
2312
2313
2314
2315
2316
2317










2318
2319
2320
2321
2322
2323
2324
....
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
....
2645
2646
2647
2648
2649
2650
2651








2652
2653
2654
2655
2656
2657
2658
....
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
....
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
....
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
....
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
....
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
....
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
....
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
....
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
....
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
....
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
....
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
** and the pExpr parameter is returned unchanged.
*/
Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr *pExpr, Token *pCollName){
  if( pCollName->n>0 ){
    Expr *pNew = sqlite3ExprAlloc(pParse->db, TK_COLLATE, pCollName, 1);
    if( pNew ){
      pNew->pLeft = pExpr;
      pNew->flags |= EP_Collate;
      pExpr = pNew;
    }
  }
  return pExpr;
}
Expr *sqlite3ExprAddCollateString(Parse *pParse, Expr *pExpr, const char *zC){
  Token s;
................................................................................
  assert( zC!=0 );
  s.z = zC;
  s.n = sqlite3Strlen30(s.z);
  return sqlite3ExprAddCollateToken(pParse, pExpr, &s);
}

/*
** Skip over any TK_COLLATE and/or TK_AS operators at the root of
** an expression.
*/
Expr *sqlite3ExprSkipCollate(Expr *pExpr){







  while( pExpr && (pExpr->op==TK_COLLATE || pExpr->op==TK_AS) ){
    pExpr = pExpr->pLeft;
  }

  return pExpr;
}

/*
** Return the collation sequence for the expression pExpr. If
** there is no defined collating sequence, return NULL.
**
................................................................................
** assigned.
*/
void sqlite3ExprAssignVarNumber(Parse *pParse, Expr *pExpr){
  sqlite3 *db = pParse->db;
  const char *z;

  if( pExpr==0 ) return;
  assert( !ExprHasAnyProperty(pExpr, EP_IntValue|EP_Reduced|EP_TokenOnly) );
  z = pExpr->u.zToken;
  assert( z!=0 );
  assert( z[0]!=0 );
  if( z[1]==0 ){
    /* Wildcard of the form "?".  Assign the next variable number */
    assert( z[0]=='?' );
    pExpr->iColumn = (ynVar)(++pParse->nVar);
................................................................................
/*
** Recursively delete an expression tree.
*/
void sqlite3ExprDelete(sqlite3 *db, Expr *p){
  if( p==0 ) return;
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );
  if( !ExprHasAnyProperty(p, EP_TokenOnly) ){
    sqlite3ExprDelete(db, p->pLeft);
    sqlite3ExprDelete(db, p->pRight);
    if( !ExprHasProperty(p, EP_Reduced) && (p->flags2 & EP2_MallocedToken)!=0 ){
      sqlite3DbFree(db, p->u.zToken);
    }
    if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
  }
  if( !ExprHasProperty(p, EP_Static) ){
................................................................................
** to reduce a pristine expression tree from the parser.  The implementation
** of dupedExprStructSize() contain multiple assert() statements that attempt
** to enforce this constraint.
*/
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  assert( flags==EXPRDUP_REDUCE || flags==0 ); /* Only one flag value allowed */


  if( 0==(flags&EXPRDUP_REDUCE) ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasAnyProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( (p->flags2 & EP2_MallocedToken)==0 );
    assert( (p->flags2 & EP2_Irreducible)==0 );
    if( p->pLeft || p->pRight || p->x.pList ){
      nSize = EXPR_REDUCEDSIZE | EP_Reduced;
    }else{

      nSize = EXPR_TOKENONLYSIZE | EP_TokenOnly;
    }
  }
  return nSize;
}

/*
................................................................................
      }else{
        int nSize = exprStructSize(p);
        memcpy(zAlloc, p, nSize);
        memset(&zAlloc[nSize], 0, EXPR_FULLSIZE-nSize);
      }

      /* Set the EP_Reduced, EP_TokenOnly, and EP_Static flags appropriately. */
      pNew->flags &= ~(EP_Reduced|EP_TokenOnly|EP_Static);
      pNew->flags |= nStructSize & (EP_Reduced|EP_TokenOnly);
      pNew->flags |= staticFlag;

      /* Copy the p->u.zToken string, if any. */
      if( nToken ){
        char *zToken = pNew->u.zToken = (char*)&zAlloc[nNewSize];
        memcpy(zToken, p->u.zToken, nToken);
................................................................................
          pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, isReduced);
        }else{
          pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, isReduced);
        }
      }

      /* Fill in pNew->pLeft and pNew->pRight. */
      if( ExprHasAnyProperty(pNew, EP_Reduced|EP_TokenOnly) ){
        zAlloc += dupedExprNodeSize(p, flags);
        if( ExprHasProperty(pNew, EP_Reduced) ){
          pNew->pLeft = exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc);
          pNew->pRight = exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc);
        }
        if( pzBuffer ){
          *pzBuffer = zAlloc;
        }
      }else{
        pNew->flags2 = 0;
        if( !ExprHasAnyProperty(p, EP_TokenOnly) ){
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
          pNew->pRight = sqlite3ExprDup(db, p->pRight, 0);
        }
      }

    }
  }
................................................................................
**
*/
static int exprNodeIsConstant(Walker *pWalker, Expr *pExpr){

  /* If pWalker->u.i is 3 then any term of the expression that comes from
  ** the ON or USING clauses of a join disqualifies the expression
  ** from being considered constant. */
  if( pWalker->u.i==3 && ExprHasAnyProperty(pExpr, EP_FromJoin) ){
    pWalker->u.i = 0;
    return WRC_Abort;
  }

  switch( pExpr->op ){
    /* Consider functions to be constant if all their arguments are constant
    ** and pWalker->u.i==2 */
................................................................................
    eType = IN_INDEX_EPH;
    if( prNotFound ){
      *prNotFound = rMayHaveNull = ++pParse->nMem;
      sqlite3VdbeAddOp2(v, OP_Null, 0, *prNotFound);
    }else{
      testcase( pParse->nQueryLoop>0 );
      pParse->nQueryLoop = 0;
      if( pX->pLeft->iColumn<0 && !ExprHasAnyProperty(pX, EP_xIsSelect) ){
        eType = IN_INDEX_ROWID;
      }
    }
    sqlite3CodeSubselect(pParse, pX, rMayHaveNull, eType==IN_INDEX_ROWID);
    pParse->nQueryLoop = savedNQueryLoop;
  }else{
    pX->iTable = iTab;
................................................................................
  **    *  The right-hand side is a correlated subquery
  **    *  The right-hand side is an expression list containing variables
  **    *  We are inside a trigger
  **
  ** If all of the above are false, then we can run this code just once
  ** save the results, and reuse the same result on subsequent invocations.
  */
  if( !ExprHasAnyProperty(pExpr, EP_VarSelect) ){
    testAddr = sqlite3CodeOnce(pParse);
  }

#ifndef SQLITE_OMIT_EXPLAIN
  if( pParse->explain==2 ){
    char *zMsg = sqlite3MPrintf(
        pParse->db, "EXECUTE %s%s SUBQUERY %d", testAddr>=0?"":"CORRELATED ",
................................................................................
      pSel->pLimit = sqlite3PExpr(pParse, TK_INTEGER, 0, 0,
                                  &sqlite3IntTokens[1]);
      pSel->iLimit = 0;
      if( sqlite3Select(pParse, pSel, &dest) ){
        return 0;
      }
      rReg = dest.iSDParm;
      ExprSetIrreducible(pExpr);
      break;
    }
  }

  if( testAddr>=0 ){
    sqlite3VdbeJumpHere(v, testAddr);
  }
................................................................................
  for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
    int r = p->iReg;
    if( r>=iFrom && r<=iTo ) return 1;    /*NO_TEST*/
  }
  return 0;
}
#endif /* SQLITE_DEBUG || SQLITE_COVERAGE_TEST */











/*
** Generate code into the current Vdbe to evaluate the given
** expression.  Attempt to store the results in register "target".
** Return the register where results are stored.
**
** With this routine, there is no guarantee that results will
................................................................................
      int i;                 /* Loop counter */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

      assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
      testcase( op==TK_CONST_FUNC );
      testcase( op==TK_FUNCTION );
      if( ExprHasAnyProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
      }else{
        pFarg = pExpr->x.pList;
      }
      nFarg = pFarg ? pFarg->nExpr : 0;
      assert( !ExprHasProperty(pExpr, EP_IntValue) );
      zId = pExpr->u.zToken;
................................................................................
          sqlite3ExprCode(pParse, pFarg->a[i].pExpr, target);
          sqlite3ExprCachePop(pParse, 1);
        }
        sqlite3VdbeResolveLabel(v, endCoalesce);
        break;
      }










      if( pFarg ){
        r1 = sqlite3GetTempRange(pParse, nFarg);

        /* For length() and typeof() functions with a column argument,
        ** set the P5 parameter to the OP_Column opcode to OPFLAG_LENGTHARG
        ** or OPFLAG_TYPEOFARG respectively, to avoid unnecessary data
................................................................................
    **   CASE WHEN e1 THEN r1 WHEN e2 THEN r2 ... WHEN eN THEN rN ELSE y END
    **
    ** Form A is can be transformed into the equivalent form B as follows:
    **   CASE WHEN x=e1 THEN r1 WHEN x=e2 THEN r2 ...
    **        WHEN x=eN THEN rN ELSE y END
    **
    ** X (if it exists) is in pExpr->pLeft.
    ** Y is in pExpr->pRight.  The Y is also optional.  If there is no
    ** ELSE clause and no other term matches, then the result of the
    ** exprssion is NULL.
    ** Ei is in pExpr->pList->a[i*2] and Ri is pExpr->pList->a[i*2+1].
    **
    ** The result of the expression is the Ri for the first matching Ei,
    ** or if there is no matching Ei, the ELSE term Y, or if there is
    ** no ELSE term, NULL.
    */
    default: assert( op==TK_CASE ); {
................................................................................
      Expr opCompare;                   /* The X==Ei expression */
      Expr cacheX;                      /* Cached expression X */
      Expr *pX;                         /* The X expression */
      Expr *pTest = 0;                  /* X==Ei (form A) or just Ei (form B) */
      VVA_ONLY( int iCacheLevel = pParse->iCacheLevel; )

      assert( !ExprHasProperty(pExpr, EP_xIsSelect) && pExpr->x.pList );
      assert((pExpr->x.pList->nExpr % 2) == 0);
      assert(pExpr->x.pList->nExpr > 0);
      pEList = pExpr->x.pList;
      aListelem = pEList->a;
      nExpr = pEList->nExpr;
      endLabel = sqlite3VdbeMakeLabel(v);
      if( (pX = pExpr->pLeft)!=0 ){
        cacheX = *pX;
        testcase( pX->op==TK_COLUMN );
        testcase( pX->op==TK_REGISTER );
        cacheX.iTable = sqlite3ExprCodeTemp(pParse, pX, &regFree1);
        testcase( regFree1==0 );
        cacheX.op = TK_REGISTER;
        opCompare.op = TK_EQ;
        opCompare.pLeft = &cacheX;
        pTest = &opCompare;
        /* Ticket b351d95f9cd5ef17e9d9dbae18f5ca8611190001:
        ** The value in regFree1 might get SCopy-ed into the file result.
        ** So make sure that the regFree1 register is not reused for other
        ** purposes and possibly overwritten.  */
        regFree1 = 0;
      }
      for(i=0; i<nExpr; i=i+2){
        sqlite3ExprCachePush(pParse);
        if( pX ){
          assert( pTest!=0 );
          opCompare.pRight = aListelem[i].pExpr;
        }else{
          pTest = aListelem[i].pExpr;
        }
................................................................................
        testcase( aListelem[i+1].pExpr->op==TK_COLUMN );
        testcase( aListelem[i+1].pExpr->op==TK_REGISTER );
        sqlite3ExprCode(pParse, aListelem[i+1].pExpr, target);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, endLabel);
        sqlite3ExprCachePop(pParse, 1);
        sqlite3VdbeResolveLabel(v, nextCase);
      }
      if( pExpr->pRight ){
        sqlite3ExprCachePush(pParse);
        sqlite3ExprCode(pParse, pExpr->pRight, target);
        sqlite3ExprCachePop(pParse, 1);
      }else{
        sqlite3VdbeAddOp2(v, OP_Null, 0, target);
      }
      assert( db->mallocFailed || pParse->nErr>0 
           || pParse->iCacheLevel==iCacheLevel );
      sqlite3VdbeResolveLabel(v, endLabel);
................................................................................
  ** no way for a TK_REGISTER to exist here.  But it seems prudent to
  ** keep the ALWAYS() in case the conditions above change with future
  ** modifications or enhancements. */
  if( ALWAYS(pExpr->op!=TK_REGISTER) ){  
    int iMem;
    iMem = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_Copy, inReg, iMem);
    pExpr->iTable = iMem;
    pExpr->op2 = pExpr->op;
    pExpr->op = TK_REGISTER;
  }
  return inReg;
}

#if defined(SQLITE_ENABLE_TREE_EXPLAIN)
/*
** Generate a human-readable explanation of an expression tree.
................................................................................
      break;
    }

    case TK_AGG_FUNCTION:
    case TK_CONST_FUNC:
    case TK_FUNCTION: {
      ExprList *pFarg;       /* List of function arguments */
      if( ExprHasAnyProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
      }else{
        pFarg = pExpr->x.pList;
      }
      if( op==TK_AGG_FUNCTION ){
        sqlite3ExplainPrintf(pOut, "AGG_FUNCTION%d:%s(",
                             pExpr->op2, pExpr->u.zToken);
................................................................................
  if( isAppropriateForFactoring(pExpr) ){
    int r1 = ++pParse->nMem;
    int r2 = sqlite3ExprCodeTarget(pParse, pExpr, r1);
    /* If r2!=r1, it means that register r1 is never used.  That is harmless
    ** but suboptimal, so we want to know about the situation to fix it.
    ** Hence the following assert: */
    assert( r2==r1 );
    pExpr->op2 = pExpr->op;
    pExpr->op = TK_REGISTER;
    pExpr->iTable = r2;
    return WRC_Prune;
  }
  return WRC_Continue;
}

/*
** Preevaluate constant subexpressions within pExpr and store the
................................................................................
  exprAnd.pRight = &compRight;
  compLeft.op = TK_GE;
  compLeft.pLeft = &exprX;
  compLeft.pRight = pExpr->x.pList->a[0].pExpr;
  compRight.op = TK_LE;
  compRight.pLeft = &exprX;
  compRight.pRight = pExpr->x.pList->a[1].pExpr;
  exprX.iTable = sqlite3ExprCodeTemp(pParse, &exprX, &regFree1);
  exprX.op2 = exprX.op;
  exprX.op = TK_REGISTER;
  if( jumpIfTrue ){
    sqlite3ExprIfTrue(pParse, &exprAnd, dest, jumpIfNull);
  }else{
    sqlite3ExprIfFalse(pParse, &exprAnd, dest, jumpIfNull);
  }
  sqlite3ReleaseTempReg(pParse, regFree1);

................................................................................
** just might result in some slightly slower code.  But returning
** an incorrect 0 or 1 could lead to a malfunction.
*/
int sqlite3ExprCompare(Expr *pA, Expr *pB, int iTab){
  if( pA==0||pB==0 ){
    return pB==pA ? 0 : 2;
  }
  assert( !ExprHasAnyProperty(pA, EP_TokenOnly|EP_Reduced) );
  assert( !ExprHasAnyProperty(pB, EP_TokenOnly|EP_Reduced) );
  if( ExprHasProperty(pA, EP_xIsSelect) || ExprHasProperty(pB, EP_xIsSelect) ){
    return 2;
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
  if( pA->op!=pB->op && (pA->op!=TK_REGISTER || pA->op2!=pB->op) ){
    if( pA->op==TK_COLLATE && sqlite3ExprCompare(pA->pLeft, pB, iTab)<2 ){
      return 1;
................................................................................
      testcase( pExpr->op==TK_COLUMN );
      /* Check to see if the column is in one of the tables in the FROM
      ** clause of the aggregate query */
      if( ALWAYS(pSrcList!=0) ){
        struct SrcList_item *pItem = pSrcList->a;
        for(i=0; i<pSrcList->nSrc; i++, pItem++){
          struct AggInfo_col *pCol;
          assert( !ExprHasAnyProperty(pExpr, EP_TokenOnly|EP_Reduced) );
          if( pExpr->iTable==pItem->iCursor ){
            /* If we reach this point, it means that pExpr refers to a table
            ** that is in the FROM clause of the aggregate query.  
            **
            ** Make an entry for the column in pAggInfo->aCol[] if there
            ** is not an entry there already.
            */
................................................................................
              }
            }
            /* There is now an entry for pExpr in pAggInfo->aCol[] (either
            ** because it was there before or because we just created it).
            ** Convert the pExpr to be a TK_AGG_COLUMN referring to that
            ** pAggInfo->aCol[] entry.
            */
            ExprSetIrreducible(pExpr);
            pExpr->pAggInfo = pAggInfo;
            pExpr->op = TK_AGG_COLUMN;
            pExpr->iAgg = (i16)k;
            break;
          } /* endif pExpr->iTable==pItem->iCursor */
        } /* end loop over pSrcList */
      }
................................................................................
            }else{
              pItem->iDistinct = -1;
            }
          }
        }
        /* Make pExpr point to the appropriate pAggInfo->aFunc[] entry
        */
        assert( !ExprHasAnyProperty(pExpr, EP_TokenOnly|EP_Reduced) );
        ExprSetIrreducible(pExpr);
        pExpr->iAgg = (i16)i;
        pExpr->pAggInfo = pAggInfo;
        return WRC_Prune;
      }else{
        return WRC_Continue;
      }
    }







|







 







|
|


>
>
>
>
>
>
>
|
|
|
>







 







|







 







|
|
|
|
|
|







 







>
>



|

|
|
|


>







 







|







 







|









<
|







 







|







 







|







 







|







 







|







 







>
>
>
>
>
>
>
>
>
>







 







|







 







>
>
>
>
>
>
>
>







 







|
|
|







 







<









|

<









|







 







|

|







 







|
<
<







 







|







 







|
<
<







 







|
<
<







 







|
|







 







|







 







|







 







|
|







66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
..
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
...
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
...
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
...
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
...
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
...
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877

878
879
880
881
882
883
884
885
....
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
....
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
....
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
....
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
....
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
....
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
....
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
....
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
....
2893
2894
2895
2896
2897
2898
2899

2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910

2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
....
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
....
3045
3046
3047
3048
3049
3050
3051
3052


3053
3054
3055
3056
3057
3058
3059
....
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
....
3424
3425
3426
3427
3428
3429
3430
3431


3432
3433
3434
3435
3436
3437
3438
....
3522
3523
3524
3525
3526
3527
3528
3529


3530
3531
3532
3533
3534
3535
3536
....
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
....
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
....
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
....
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
** and the pExpr parameter is returned unchanged.
*/
Expr *sqlite3ExprAddCollateToken(Parse *pParse, Expr *pExpr, Token *pCollName){
  if( pCollName->n>0 ){
    Expr *pNew = sqlite3ExprAlloc(pParse->db, TK_COLLATE, pCollName, 1);
    if( pNew ){
      pNew->pLeft = pExpr;
      pNew->flags |= EP_Collate|EP_Skip;
      pExpr = pNew;
    }
  }
  return pExpr;
}
Expr *sqlite3ExprAddCollateString(Parse *pParse, Expr *pExpr, const char *zC){
  Token s;
................................................................................
  assert( zC!=0 );
  s.z = zC;
  s.n = sqlite3Strlen30(s.z);
  return sqlite3ExprAddCollateToken(pParse, pExpr, &s);
}

/*
** Skip over any TK_COLLATE or TK_AS operators and any unlikely()
** or likelihood() function at the root of an expression.
*/
Expr *sqlite3ExprSkipCollate(Expr *pExpr){
  while( pExpr && ExprHasProperty(pExpr, EP_Skip) ){
    if( ExprHasProperty(pExpr, EP_Unlikely) ){
      assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
      assert( pExpr->x.pList->nExpr>0 );
      assert( pExpr->op==TK_FUNCTION );
      pExpr = pExpr->x.pList->a[0].pExpr;
    }else{
      assert( pExpr->op==TK_COLLATE || pExpr->op==TK_AS );
      pExpr = pExpr->pLeft;
    }
  }   
  return pExpr;
}

/*
** Return the collation sequence for the expression pExpr. If
** there is no defined collating sequence, return NULL.
**
................................................................................
** assigned.
*/
void sqlite3ExprAssignVarNumber(Parse *pParse, Expr *pExpr){
  sqlite3 *db = pParse->db;
  const char *z;

  if( pExpr==0 ) return;
  assert( !ExprHasProperty(pExpr, EP_IntValue|EP_Reduced|EP_TokenOnly) );
  z = pExpr->u.zToken;
  assert( z!=0 );
  assert( z[0]!=0 );
  if( z[1]==0 ){
    /* Wildcard of the form "?".  Assign the next variable number */
    assert( z[0]=='?' );
    pExpr->iColumn = (ynVar)(++pParse->nVar);
................................................................................
/*
** Recursively delete an expression tree.
*/
void sqlite3ExprDelete(sqlite3 *db, Expr *p){
  if( p==0 ) return;
  /* Sanity check: Assert that the IntValue is non-negative if it exists */
  assert( !ExprHasProperty(p, EP_IntValue) || p->u.iValue>=0 );
  if( !ExprHasProperty(p, EP_TokenOnly) ){
    /* The Expr.x union is never used at the same time as Expr.pRight */
    assert( p->x.pList==0 || p->pRight==0 );
    sqlite3ExprDelete(db, p->pLeft);
    sqlite3ExprDelete(db, p->pRight);
    if( ExprHasProperty(p, EP_MemToken) ) sqlite3DbFree(db, p->u.zToken);
    if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
  }
  if( !ExprHasProperty(p, EP_Static) ){
................................................................................
** to reduce a pristine expression tree from the parser.  The implementation
** of dupedExprStructSize() contain multiple assert() statements that attempt
** to enforce this constraint.
*/
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&EXPRDUP_REDUCE) ){
    nSize = EXPR_FULLSIZE;
  }else{
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    assert( !ExprHasProperty(p, EP_FromJoin) ); 
    assert( !ExprHasProperty(p, EP_MemToken) );
    assert( !ExprHasProperty(p, EP_NoReduce) );
    if( p->pLeft || p->x.pList ){
      nSize = EXPR_REDUCEDSIZE | EP_Reduced;
    }else{
      assert( p->pRight==0 );
      nSize = EXPR_TOKENONLYSIZE | EP_TokenOnly;
    }
  }
  return nSize;
}

/*
................................................................................
      }else{
        int nSize = exprStructSize(p);
        memcpy(zAlloc, p, nSize);
        memset(&zAlloc[nSize], 0, EXPR_FULLSIZE-nSize);
      }

      /* Set the EP_Reduced, EP_TokenOnly, and EP_Static flags appropriately. */
      pNew->flags &= ~(EP_Reduced|EP_TokenOnly|EP_Static|EP_MemToken);
      pNew->flags |= nStructSize & (EP_Reduced|EP_TokenOnly);
      pNew->flags |= staticFlag;

      /* Copy the p->u.zToken string, if any. */
      if( nToken ){
        char *zToken = pNew->u.zToken = (char*)&zAlloc[nNewSize];
        memcpy(zToken, p->u.zToken, nToken);
................................................................................
          pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, isReduced);
        }else{
          pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, isReduced);
        }
      }

      /* Fill in pNew->pLeft and pNew->pRight. */
      if( ExprHasProperty(pNew, EP_Reduced|EP_TokenOnly) ){
        zAlloc += dupedExprNodeSize(p, flags);
        if( ExprHasProperty(pNew, EP_Reduced) ){
          pNew->pLeft = exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc);
          pNew->pRight = exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc);
        }
        if( pzBuffer ){
          *pzBuffer = zAlloc;
        }
      }else{

        if( !ExprHasProperty(p, EP_TokenOnly) ){
          pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
          pNew->pRight = sqlite3ExprDup(db, p->pRight, 0);
        }
      }

    }
  }
................................................................................
**
*/
static int exprNodeIsConstant(Walker *pWalker, Expr *pExpr){

  /* If pWalker->u.i is 3 then any term of the expression that comes from
  ** the ON or USING clauses of a join disqualifies the expression
  ** from being considered constant. */
  if( pWalker->u.i==3 && ExprHasProperty(pExpr, EP_FromJoin) ){
    pWalker->u.i = 0;
    return WRC_Abort;
  }

  switch( pExpr->op ){
    /* Consider functions to be constant if all their arguments are constant
    ** and pWalker->u.i==2 */
................................................................................
    eType = IN_INDEX_EPH;
    if( prNotFound ){
      *prNotFound = rMayHaveNull = ++pParse->nMem;
      sqlite3VdbeAddOp2(v, OP_Null, 0, *prNotFound);
    }else{
      testcase( pParse->nQueryLoop>0 );
      pParse->nQueryLoop = 0;
      if( pX->pLeft->iColumn<0 && !ExprHasProperty(pX, EP_xIsSelect) ){
        eType = IN_INDEX_ROWID;
      }
    }
    sqlite3CodeSubselect(pParse, pX, rMayHaveNull, eType==IN_INDEX_ROWID);
    pParse->nQueryLoop = savedNQueryLoop;
  }else{
    pX->iTable = iTab;
................................................................................
  **    *  The right-hand side is a correlated subquery
  **    *  The right-hand side is an expression list containing variables
  **    *  We are inside a trigger
  **
  ** If all of the above are false, then we can run this code just once
  ** save the results, and reuse the same result on subsequent invocations.
  */
  if( !ExprHasProperty(pExpr, EP_VarSelect) ){
    testAddr = sqlite3CodeOnce(pParse);
  }

#ifndef SQLITE_OMIT_EXPLAIN
  if( pParse->explain==2 ){
    char *zMsg = sqlite3MPrintf(
        pParse->db, "EXECUTE %s%s SUBQUERY %d", testAddr>=0?"":"CORRELATED ",
................................................................................
      pSel->pLimit = sqlite3PExpr(pParse, TK_INTEGER, 0, 0,
                                  &sqlite3IntTokens[1]);
      pSel->iLimit = 0;
      if( sqlite3Select(pParse, pSel, &dest) ){
        return 0;
      }
      rReg = dest.iSDParm;
      ExprSetVVAProperty(pExpr, EP_NoReduce);
      break;
    }
  }

  if( testAddr>=0 ){
    sqlite3VdbeJumpHere(v, testAddr);
  }
................................................................................
  for(i=0, p=pParse->aColCache; i<SQLITE_N_COLCACHE; i++, p++){
    int r = p->iReg;
    if( r>=iFrom && r<=iTo ) return 1;    /*NO_TEST*/
  }
  return 0;
}
#endif /* SQLITE_DEBUG || SQLITE_COVERAGE_TEST */

/*
** Convert an expression node to a TK_REGISTER
*/
static void exprToRegister(Expr *p, int iReg){
  p->op2 = p->op;
  p->op = TK_REGISTER;
  p->iTable = iReg;
  ExprClearProperty(p, EP_Skip);
}

/*
** Generate code into the current Vdbe to evaluate the given
** expression.  Attempt to store the results in register "target".
** Return the register where results are stored.
**
** With this routine, there is no guarantee that results will
................................................................................
      int i;                 /* Loop counter */
      u8 enc = ENC(db);      /* The text encoding used by this database */
      CollSeq *pColl = 0;    /* A collating sequence */

      assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
      testcase( op==TK_CONST_FUNC );
      testcase( op==TK_FUNCTION );
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
      }else{
        pFarg = pExpr->x.pList;
      }
      nFarg = pFarg ? pFarg->nExpr : 0;
      assert( !ExprHasProperty(pExpr, EP_IntValue) );
      zId = pExpr->u.zToken;
................................................................................
          sqlite3ExprCode(pParse, pFarg->a[i].pExpr, target);
          sqlite3ExprCachePop(pParse, 1);
        }
        sqlite3VdbeResolveLabel(v, endCoalesce);
        break;
      }

      /* The UNLIKELY() function is a no-op.  The result is the value
      ** of the first argument.
      */
      if( pDef->funcFlags & SQLITE_FUNC_UNLIKELY ){
        assert( nFarg>=1 );
        sqlite3ExprCode(pParse, pFarg->a[0].pExpr, target);
        break;
      }

      if( pFarg ){
        r1 = sqlite3GetTempRange(pParse, nFarg);

        /* For length() and typeof() functions with a column argument,
        ** set the P5 parameter to the OP_Column opcode to OPFLAG_LENGTHARG
        ** or OPFLAG_TYPEOFARG respectively, to avoid unnecessary data
................................................................................
    **   CASE WHEN e1 THEN r1 WHEN e2 THEN r2 ... WHEN eN THEN rN ELSE y END
    **
    ** Form A is can be transformed into the equivalent form B as follows:
    **   CASE WHEN x=e1 THEN r1 WHEN x=e2 THEN r2 ...
    **        WHEN x=eN THEN rN ELSE y END
    **
    ** X (if it exists) is in pExpr->pLeft.
    ** Y is in the last element of pExpr->x.pList if pExpr->x.pList->nExpr is
    ** odd.  The Y is also optional.  If the number of elements in x.pList
    ** is even, then Y is omitted and the "otherwise" result is NULL.
    ** Ei is in pExpr->pList->a[i*2] and Ri is pExpr->pList->a[i*2+1].
    **
    ** The result of the expression is the Ri for the first matching Ei,
    ** or if there is no matching Ei, the ELSE term Y, or if there is
    ** no ELSE term, NULL.
    */
    default: assert( op==TK_CASE ); {
................................................................................
      Expr opCompare;                   /* The X==Ei expression */
      Expr cacheX;                      /* Cached expression X */
      Expr *pX;                         /* The X expression */
      Expr *pTest = 0;                  /* X==Ei (form A) or just Ei (form B) */
      VVA_ONLY( int iCacheLevel = pParse->iCacheLevel; )

      assert( !ExprHasProperty(pExpr, EP_xIsSelect) && pExpr->x.pList );

      assert(pExpr->x.pList->nExpr > 0);
      pEList = pExpr->x.pList;
      aListelem = pEList->a;
      nExpr = pEList->nExpr;
      endLabel = sqlite3VdbeMakeLabel(v);
      if( (pX = pExpr->pLeft)!=0 ){
        cacheX = *pX;
        testcase( pX->op==TK_COLUMN );
        testcase( pX->op==TK_REGISTER );
        exprToRegister(&cacheX, sqlite3ExprCodeTemp(pParse, pX, &regFree1));
        testcase( regFree1==0 );

        opCompare.op = TK_EQ;
        opCompare.pLeft = &cacheX;
        pTest = &opCompare;
        /* Ticket b351d95f9cd5ef17e9d9dbae18f5ca8611190001:
        ** The value in regFree1 might get SCopy-ed into the file result.
        ** So make sure that the regFree1 register is not reused for other
        ** purposes and possibly overwritten.  */
        regFree1 = 0;
      }
      for(i=0; i<nExpr-1; i=i+2){
        sqlite3ExprCachePush(pParse);
        if( pX ){
          assert( pTest!=0 );
          opCompare.pRight = aListelem[i].pExpr;
        }else{
          pTest = aListelem[i].pExpr;
        }
................................................................................
        testcase( aListelem[i+1].pExpr->op==TK_COLUMN );
        testcase( aListelem[i+1].pExpr->op==TK_REGISTER );
        sqlite3ExprCode(pParse, aListelem[i+1].pExpr, target);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, endLabel);
        sqlite3ExprCachePop(pParse, 1);
        sqlite3VdbeResolveLabel(v, nextCase);
      }
      if( (nExpr&1)!=0 ){
        sqlite3ExprCachePush(pParse);
        sqlite3ExprCode(pParse, pEList->a[nExpr-1].pExpr, target);
        sqlite3ExprCachePop(pParse, 1);
      }else{
        sqlite3VdbeAddOp2(v, OP_Null, 0, target);
      }
      assert( db->mallocFailed || pParse->nErr>0 
           || pParse->iCacheLevel==iCacheLevel );
      sqlite3VdbeResolveLabel(v, endLabel);
................................................................................
  ** no way for a TK_REGISTER to exist here.  But it seems prudent to
  ** keep the ALWAYS() in case the conditions above change with future
  ** modifications or enhancements. */
  if( ALWAYS(pExpr->op!=TK_REGISTER) ){  
    int iMem;
    iMem = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_Copy, inReg, iMem);
    exprToRegister(pExpr, iMem);


  }
  return inReg;
}

#if defined(SQLITE_ENABLE_TREE_EXPLAIN)
/*
** Generate a human-readable explanation of an expression tree.
................................................................................
      break;
    }

    case TK_AGG_FUNCTION:
    case TK_CONST_FUNC:
    case TK_FUNCTION: {
      ExprList *pFarg;       /* List of function arguments */
      if( ExprHasProperty(pExpr, EP_TokenOnly) ){
        pFarg = 0;
      }else{
        pFarg = pExpr->x.pList;
      }
      if( op==TK_AGG_FUNCTION ){
        sqlite3ExplainPrintf(pOut, "AGG_FUNCTION%d:%s(",
                             pExpr->op2, pExpr->u.zToken);
................................................................................
  if( isAppropriateForFactoring(pExpr) ){
    int r1 = ++pParse->nMem;
    int r2 = sqlite3ExprCodeTarget(pParse, pExpr, r1);
    /* If r2!=r1, it means that register r1 is never used.  That is harmless
    ** but suboptimal, so we want to know about the situation to fix it.
    ** Hence the following assert: */
    assert( r2==r1 );
    exprToRegister(pExpr, r2);


    return WRC_Prune;
  }
  return WRC_Continue;
}

/*
** Preevaluate constant subexpressions within pExpr and store the
................................................................................
  exprAnd.pRight = &compRight;
  compLeft.op = TK_GE;
  compLeft.pLeft = &exprX;
  compLeft.pRight = pExpr->x.pList->a[0].pExpr;
  compRight.op = TK_LE;
  compRight.pLeft = &exprX;
  compRight.pRight = pExpr->x.pList->a[1].pExpr;
  exprToRegister(&exprX, sqlite3ExprCodeTemp(pParse, &exprX, &regFree1));


  if( jumpIfTrue ){
    sqlite3ExprIfTrue(pParse, &exprAnd, dest, jumpIfNull);
  }else{
    sqlite3ExprIfFalse(pParse, &exprAnd, dest, jumpIfNull);
  }
  sqlite3ReleaseTempReg(pParse, regFree1);

................................................................................
** just might result in some slightly slower code.  But returning
** an incorrect 0 or 1 could lead to a malfunction.
*/
int sqlite3ExprCompare(Expr *pA, Expr *pB, int iTab){
  if( pA==0||pB==0 ){
    return pB==pA ? 0 : 2;
  }
  assert( !ExprHasProperty(pA, EP_TokenOnly|EP_Reduced) );
  assert( !ExprHasProperty(pB, EP_TokenOnly|EP_Reduced) );
  if( ExprHasProperty(pA, EP_xIsSelect) || ExprHasProperty(pB, EP_xIsSelect) ){
    return 2;
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
  if( pA->op!=pB->op && (pA->op!=TK_REGISTER || pA->op2!=pB->op) ){
    if( pA->op==TK_COLLATE && sqlite3ExprCompare(pA->pLeft, pB, iTab)<2 ){
      return 1;
................................................................................
      testcase( pExpr->op==TK_COLUMN );
      /* Check to see if the column is in one of the tables in the FROM
      ** clause of the aggregate query */
      if( ALWAYS(pSrcList!=0) ){
        struct SrcList_item *pItem = pSrcList->a;
        for(i=0; i<pSrcList->nSrc; i++, pItem++){
          struct AggInfo_col *pCol;
          assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );
          if( pExpr->iTable==pItem->iCursor ){
            /* If we reach this point, it means that pExpr refers to a table
            ** that is in the FROM clause of the aggregate query.  
            **
            ** Make an entry for the column in pAggInfo->aCol[] if there
            ** is not an entry there already.
            */
................................................................................
              }
            }
            /* There is now an entry for pExpr in pAggInfo->aCol[] (either
            ** because it was there before or because we just created it).
            ** Convert the pExpr to be a TK_AGG_COLUMN referring to that
            ** pAggInfo->aCol[] entry.
            */
            ExprSetVVAProperty(pExpr, EP_NoReduce);
            pExpr->pAggInfo = pAggInfo;
            pExpr->op = TK_AGG_COLUMN;
            pExpr->iAgg = (i16)k;
            break;
          } /* endif pExpr->iTable==pItem->iCursor */
        } /* end loop over pSrcList */
      }
................................................................................
            }else{
              pItem->iDistinct = -1;
            }
          }
        }
        /* Make pExpr point to the appropriate pAggInfo->aFunc[] entry
        */
        assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );
        ExprSetVVAProperty(pExpr, EP_NoReduce);
        pExpr->iAgg = (i16)i;
        pExpr->pAggInfo = pAggInfo;
        return WRC_Prune;
      }else{
        return WRC_Continue;
      }
    }

Changes to src/func.c

414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
...
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
...
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
...
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
....
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664


1665
1666
1667
1668
1669
1670
1671
      }
      sqlite3_result_text(context, z1, n, sqlite3_free);
    }
  }
}

/*
** The COALESCE() and IFNULL() functions are implemented as VDBE code so
** that unused argument values do not have to be computed.  However, we
** still need some kind of function implementation for this routines in
** the function table.  That function implementation will never be called
** so it doesn't matter what the implementation is.  We might as well use
** the "version()" function as a substitute.
*/
#define ifnullFunc versionFunc   /* Substitute function - never called */

/*
** Implementation of random().  Return a random integer.  
*/
static void randomFunc(
  sqlite3_context *context,
  int NotUsed,
................................................................................
** For LIKE and GLOB matching on EBCDIC machines, assume that every
** character is exactly one byte in size.  Also, all characters are
** able to participate in upper-case-to-lower-case mappings in EBCDIC
** whereas only characters less than 0x80 do in ASCII.
*/
#if defined(SQLITE_EBCDIC)
# define sqlite3Utf8Read(A)    (*((*A)++))
# define GlogUpperToLower(A)   A = sqlite3UpperToLower[A]
#else
# define GlogUpperToLower(A)   if( !((A)&~0x7f) ){ A = sqlite3UpperToLower[A]; }
#endif

static const struct compareInfo globInfo = { '*', '?', '[', 0 };
/* The correct SQL-92 behavior is for the LIKE operator to ignore
** case.  Thus  'a' LIKE 'A' would be true. */
static const struct compareInfo likeInfoNorm = { '%', '_',   0, 1 };
/* If SQLITE_CASE_SENSITIVE_LIKE is defined, then the LIKE operator
................................................................................
        while( *zString && patternCompare(&zPattern[-1],zString,pInfo,esc)==0 ){
          SQLITE_SKIP_UTF8(zString);
        }
        return *zString!=0;
      }
      while( (c2 = sqlite3Utf8Read(&zString))!=0 ){
        if( noCase ){
          GlogUpperToLower(c2);
          GlogUpperToLower(c);
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(&zString);
            GlogUpperToLower(c2);
          }
        }else{
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(&zString);
          }
        }
        if( c2==0 ) return 0;
................................................................................
        return 0;
      }
    }else if( esc==c && !prevEscape ){
      prevEscape = 1;
    }else{
      c2 = sqlite3Utf8Read(&zString);
      if( noCase ){
        GlogUpperToLower(c);
        GlogUpperToLower(c2);
      }
      if( c!=c2 ){
        return 0;
      }
      prevEscape = 0;
    }
  }
................................................................................
    FUNCTION(round,              1, 0, 0, roundFunc        ),
    FUNCTION(round,              2, 0, 0, roundFunc        ),
#endif
    FUNCTION(upper,              1, 0, 0, upperFunc        ),
    FUNCTION(lower,              1, 0, 0, lowerFunc        ),
    FUNCTION(coalesce,           1, 0, 0, 0                ),
    FUNCTION(coalesce,           0, 0, 0, 0                ),
    FUNCTION2(coalesce,         -1, 0, 0, ifnullFunc,  SQLITE_FUNC_COALESCE),
    FUNCTION(hex,                1, 0, 0, hexFunc          ),
    FUNCTION2(ifnull,            2, 0, 0, ifnullFunc,  SQLITE_FUNC_COALESCE),


    FUNCTION(random,             0, 0, 0, randomFunc       ),
    FUNCTION(randomblob,         1, 0, 0, randomBlob       ),
    FUNCTION(nullif,             2, 0, 1, nullifFunc       ),
    FUNCTION(sqlite_version,     0, 0, 0, versionFunc      ),
    FUNCTION(sqlite_source_id,   0, 0, 0, sourceidFunc     ),
    FUNCTION(sqlite_log,         2, 0, 0, errlogFunc       ),
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS







|
|
|
|
|
|

|







 







|

|







 







|
|


|







 







|
|







 







|

|
>
>







414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
...
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
...
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
...
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
....
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
      }
      sqlite3_result_text(context, z1, n, sqlite3_free);
    }
  }
}

/*
** Some functions like COALESCE() and IFNULL() and UNLIKELY() are implemented
** as VDBE code so that unused argument values do not have to be computed.
** However, we still need some kind of function implementation for this
** routines in the function table.  The noopFunc macro provides this.
** noopFunc will never be called so it doesn't matter what the implementation
** is.  We might as well use the "version()" function as a substitute.
*/
#define noopFunc versionFunc   /* Substitute function - never called */

/*
** Implementation of random().  Return a random integer.  
*/
static void randomFunc(
  sqlite3_context *context,
  int NotUsed,
................................................................................
** For LIKE and GLOB matching on EBCDIC machines, assume that every
** character is exactly one byte in size.  Also, all characters are
** able to participate in upper-case-to-lower-case mappings in EBCDIC
** whereas only characters less than 0x80 do in ASCII.
*/
#if defined(SQLITE_EBCDIC)
# define sqlite3Utf8Read(A)    (*((*A)++))
# define GlobUpperToLower(A)   A = sqlite3UpperToLower[A]
#else
# define GlobUpperToLower(A)   if( !((A)&~0x7f) ){ A = sqlite3UpperToLower[A]; }
#endif

static const struct compareInfo globInfo = { '*', '?', '[', 0 };
/* The correct SQL-92 behavior is for the LIKE operator to ignore
** case.  Thus  'a' LIKE 'A' would be true. */
static const struct compareInfo likeInfoNorm = { '%', '_',   0, 1 };
/* If SQLITE_CASE_SENSITIVE_LIKE is defined, then the LIKE operator
................................................................................
        while( *zString && patternCompare(&zPattern[-1],zString,pInfo,esc)==0 ){
          SQLITE_SKIP_UTF8(zString);
        }
        return *zString!=0;
      }
      while( (c2 = sqlite3Utf8Read(&zString))!=0 ){
        if( noCase ){
          GlobUpperToLower(c2);
          GlobUpperToLower(c);
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(&zString);
            GlobUpperToLower(c2);
          }
        }else{
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(&zString);
          }
        }
        if( c2==0 ) return 0;
................................................................................
        return 0;
      }
    }else if( esc==c && !prevEscape ){
      prevEscape = 1;
    }else{
      c2 = sqlite3Utf8Read(&zString);
      if( noCase ){
        GlobUpperToLower(c);
        GlobUpperToLower(c2);
      }
      if( c!=c2 ){
        return 0;
      }
      prevEscape = 0;
    }
  }
................................................................................
    FUNCTION(round,              1, 0, 0, roundFunc        ),
    FUNCTION(round,              2, 0, 0, roundFunc        ),
#endif
    FUNCTION(upper,              1, 0, 0, upperFunc        ),
    FUNCTION(lower,              1, 0, 0, lowerFunc        ),
    FUNCTION(coalesce,           1, 0, 0, 0                ),
    FUNCTION(coalesce,           0, 0, 0, 0                ),
    FUNCTION2(coalesce,         -1, 0, 0, noopFunc,  SQLITE_FUNC_COALESCE),
    FUNCTION(hex,                1, 0, 0, hexFunc          ),
    FUNCTION2(ifnull,            2, 0, 0, noopFunc,  SQLITE_FUNC_COALESCE),
    FUNCTION2(unlikely,          1, 0, 0, noopFunc,  SQLITE_FUNC_UNLIKELY),
    FUNCTION2(likelihood,        2, 0, 0, noopFunc,  SQLITE_FUNC_UNLIKELY),
    FUNCTION(random,             0, 0, 0, randomFunc       ),
    FUNCTION(randomblob,         1, 0, 0, randomBlob       ),
    FUNCTION(nullif,             2, 0, 1, nullifFunc       ),
    FUNCTION(sqlite_version,     0, 0, 0, versionFunc      ),
    FUNCTION(sqlite_source_id,   0, 0, 0, sourceidFunc     ),
    FUNCTION(sqlite_log,         2, 0, 0, errlogFunc       ),
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS

Changes to src/malloc.c

480
481
482
483
484
485
486

487
488
489
490
491
492
493

/*
** Free memory that might be associated with a particular database
** connection.
*/
void sqlite3DbFree(sqlite3 *db, void *p){
  assert( db==0 || sqlite3_mutex_held(db->mutex) );

  if( db ){
    if( db->pnBytesFreed ){
      *db->pnBytesFreed += sqlite3DbMallocSize(db, p);
      return;
    }
    if( isLookaside(db, p) ){
      LookasideSlot *pBuf = (LookasideSlot*)p;







>







480
481
482
483
484
485
486
487
488
489
490
491
492
493
494

/*
** Free memory that might be associated with a particular database
** connection.
*/
void sqlite3DbFree(sqlite3 *db, void *p){
  assert( db==0 || sqlite3_mutex_held(db->mutex) );
  if( p==0 ) return;
  if( db ){
    if( db->pnBytesFreed ){
      *db->pnBytesFreed += sqlite3DbMallocSize(db, p);
      return;
    }
    if( isLookaside(db, p) ){
      LookasideSlot *pBuf = (LookasideSlot*)p;

Changes to src/os_win.c

104
105
106
107
108
109
110








111
112
113
114
115
116
117
...
354
355
356
357
358
359
360
361

362
363
364
365
366
367
368
....
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
....
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
....
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
....
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
....
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
....
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
....
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200

3201
3202
3203

3204
3205
3206
3207
3208
3209
3210
....
3915
3916
3917
3918
3919
3920
3921

3922
3923
3924
3925
3926
3927
3928
....
3933
3934
3935
3936
3937
3938
3939

3940
3941
3942
3943
3944
3945
3946
** Returns non-zero if the character should be treated as a directory
** separator.
*/
#ifndef winIsDirSep
#  define winIsDirSep(a)                (((a) == '/') || ((a) == '\\'))
#endif









/*
** Returns the string that should be used as the directory separator.
*/
#ifndef winGetDirDep
#  ifdef __CYGWIN__
#    define winGetDirDep()              "/"
#  else
................................................................................
** 2:   Operating system is WinNT.
**
** In order to facilitate testing on a WinNT system, the test fixture
** can manually set this value to 1 to emulate Win98 behavior.
*/
#ifdef SQLITE_TEST
int sqlite3_os_type = 0;
#else

static int sqlite3_os_type = 0;
#endif

#ifndef SYSCALL
#  define SYSCALL sqlite3_syscall_ptr
#endif

................................................................................
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
  assert( nBytes>=0 );
  p = osHeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
  if( !p ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapAlloc %u bytes (%d), heap=%p",
                nBytes, osGetLastError(), (void*)hHeap);
  }
  return p;
}

/*
** Free memory.
................................................................................
  assert( hHeap!=0 );
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) );
#endif
  if( !pPrior ) return; /* Passing NULL to HeapFree is undefined. */
  if( !osHeapFree(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapFree block %p (%d), heap=%p",
                pPrior, osGetLastError(), (void*)hHeap);
  }
}

/*
** Change the size of an existing memory allocation
*/
................................................................................
  assert( nBytes>=0 );
  if( !pPrior ){
    p = osHeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
  }else{
    p = osHeapReAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior, (SIZE_T)nBytes);
  }
  if( !p ){
    sqlite3_log(SQLITE_NOMEM, "failed to %s %u bytes (%d), heap=%p",
                pPrior ? "HeapReAlloc" : "HeapAlloc", nBytes, osGetLastError(),
                (void*)hHeap);
  }
  return p;
}

/*
................................................................................
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
  if( !p ) return 0;
  n = osHeapSize(hHeap, SQLITE_WIN32_HEAP_FLAGS, p);
  if( n==(SIZE_T)-1 ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapSize block %p (%d), heap=%p",
                p, osGetLastError(), (void*)hHeap);
    return 0;
  }
  return (int)n;
}

/*
................................................................................
#if !SQLITE_OS_WINRT && SQLITE_WIN32_HEAP_CREATE
  if( !pWinMemData->hHeap ){
    pWinMemData->hHeap = osHeapCreate(SQLITE_WIN32_HEAP_FLAGS,
                                      SQLITE_WIN32_HEAP_INIT_SIZE,
                                      SQLITE_WIN32_HEAP_MAX_SIZE);
    if( !pWinMemData->hHeap ){
      sqlite3_log(SQLITE_NOMEM,
          "failed to HeapCreate (%d), flags=%u, initSize=%u, maxSize=%u",
          osGetLastError(), SQLITE_WIN32_HEAP_FLAGS,
          SQLITE_WIN32_HEAP_INIT_SIZE, SQLITE_WIN32_HEAP_MAX_SIZE);
      return SQLITE_NOMEM;
    }
    pWinMemData->bOwned = TRUE;
    assert( pWinMemData->bOwned );
  }
#else
  pWinMemData->hHeap = osGetProcessHeap();
  if( !pWinMemData->hHeap ){
    sqlite3_log(SQLITE_NOMEM,
        "failed to GetProcessHeap (%d)", osGetLastError());
    return SQLITE_NOMEM;
  }
  pWinMemData->bOwned = FALSE;
  assert( !pWinMemData->bOwned );
#endif
  assert( pWinMemData->hHeap!=0 );
  assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
................................................................................
  if( pWinMemData->hHeap ){
    assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
    assert( osHeapValidate(pWinMemData->hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
    if( pWinMemData->bOwned ){
      if( !osHeapDestroy(pWinMemData->hHeap) ){
        sqlite3_log(SQLITE_NOMEM, "failed to HeapDestroy (%d), heap=%p",
                    osGetLastError(), (void*)pWinMemData->hHeap);
      }
      pWinMemData->bOwned = FALSE;
    }
    pWinMemData->hHeap = NULL;
  }
}
................................................................................
**
** This is not a VFS shared-memory method; it is a utility function called
** by VFS shared-memory methods.
*/
static void winShmPurge(sqlite3_vfs *pVfs, int deleteFlag){
  winShmNode **pp;
  winShmNode *p;
  BOOL bRc;
  assert( winShmMutexHeld() );
  OSTRACE(("SHM-PURGE pid=%lu, deleteFlag=%d\n",
           osGetCurrentProcessId(), deleteFlag));
  pp = &winShmNodeList;
  while( (p = *pp)!=0 ){
    if( p->nRef==0 ){
      int i;
      if( p->mutex ) sqlite3_mutex_free(p->mutex);
      for(i=0; i<p->nRegion; i++){
        bRc = osUnmapViewOfFile(p->aRegion[i].pMap);
        OSTRACE(("SHM-PURGE-UNMAP pid=%lu, region=%d, rc=%s\n",
                 osGetCurrentProcessId(), i, bRc ? "ok" : "failed"));

        bRc = osCloseHandle(p->aRegion[i].hMap);
        OSTRACE(("SHM-PURGE-CLOSE pid=%lu, region=%d, rc=%s\n",
                 osGetCurrentProcessId(), i, bRc ? "ok" : "failed"));

      }
      if( p->hFile.h!=NULL && p->hFile.h!=INVALID_HANDLE_VALUE ){
        SimulateIOErrorBenign(1);
        winClose((sqlite3_file *)&p->hFile);
        SimulateIOErrorBenign(0);
      }
      if( deleteFlag ){
................................................................................
/****************************************************************************
**************************** sqlite3_vfs methods ****************************
**
** This division contains the implementation of methods on the
** sqlite3_vfs object.
*/


/*
** Convert a filename from whatever the underlying operating system
** supports for filenames into UTF-8.  Space to hold the result is
** obtained from malloc and must be freed by the calling function.
*/
static char *winConvertToUtf8Filename(const void *zFilename){
  char *zConverted = 0;
................................................................................
  else{
    zConverted = sqlite3_win32_mbcs_to_utf8(zFilename);
  }
#endif
  /* caller will handle out of memory */
  return zConverted;
}


/*
** Convert a UTF-8 filename into whatever form the underlying
** operating system wants filenames in.  Space to hold the result
** is obtained from malloc and must be freed by the calling
** function.
*/







>
>
>
>
>
>
>
>







 







|
>







 







|







 







|







 







|







 







|







 







|











|







 







|







 







<









|


>



>







 







>







 







>







104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
...
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
....
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
....
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
....
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
....
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
....
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
....
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
....
3190
3191
3192
3193
3194
3195
3196

3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
....
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
....
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
** Returns non-zero if the character should be treated as a directory
** separator.
*/
#ifndef winIsDirSep
#  define winIsDirSep(a)                (((a) == '/') || ((a) == '\\'))
#endif

/*
** This macro is used when a local variable is set to a value that is
** [sometimes] not used by the code (e.g. via conditional compilation).
*/
#ifndef UNUSED_VARIABLE_VALUE
#  define UNUSED_VARIABLE_VALUE(x) (void)(x)
#endif

/*
** Returns the string that should be used as the directory separator.
*/
#ifndef winGetDirDep
#  ifdef __CYGWIN__
#    define winGetDirDep()              "/"
#  else
................................................................................
** 2:   Operating system is WinNT.
**
** In order to facilitate testing on a WinNT system, the test fixture
** can manually set this value to 1 to emulate Win98 behavior.
*/
#ifdef SQLITE_TEST
int sqlite3_os_type = 0;
#elif !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && \
      defined(SQLITE_WIN32_HAS_ANSI) && defined(SQLITE_WIN32_HAS_WIDE)
static int sqlite3_os_type = 0;
#endif

#ifndef SYSCALL
#  define SYSCALL sqlite3_syscall_ptr
#endif

................................................................................
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
  assert( nBytes>=0 );
  p = osHeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
  if( !p ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapAlloc %u bytes (%lu), heap=%p",
                nBytes, osGetLastError(), (void*)hHeap);
  }
  return p;
}

/*
** Free memory.
................................................................................
  assert( hHeap!=0 );
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) );
#endif
  if( !pPrior ) return; /* Passing NULL to HeapFree is undefined. */
  if( !osHeapFree(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior) ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapFree block %p (%lu), heap=%p",
                pPrior, osGetLastError(), (void*)hHeap);
  }
}

/*
** Change the size of an existing memory allocation
*/
................................................................................
  assert( nBytes>=0 );
  if( !pPrior ){
    p = osHeapAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, (SIZE_T)nBytes);
  }else{
    p = osHeapReAlloc(hHeap, SQLITE_WIN32_HEAP_FLAGS, pPrior, (SIZE_T)nBytes);
  }
  if( !p ){
    sqlite3_log(SQLITE_NOMEM, "failed to %s %u bytes (%lu), heap=%p",
                pPrior ? "HeapReAlloc" : "HeapAlloc", nBytes, osGetLastError(),
                (void*)hHeap);
  }
  return p;
}

/*
................................................................................
  assert( hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
  assert ( osHeapValidate(hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
  if( !p ) return 0;
  n = osHeapSize(hHeap, SQLITE_WIN32_HEAP_FLAGS, p);
  if( n==(SIZE_T)-1 ){
    sqlite3_log(SQLITE_NOMEM, "failed to HeapSize block %p (%lu), heap=%p",
                p, osGetLastError(), (void*)hHeap);
    return 0;
  }
  return (int)n;
}

/*
................................................................................
#if !SQLITE_OS_WINRT && SQLITE_WIN32_HEAP_CREATE
  if( !pWinMemData->hHeap ){
    pWinMemData->hHeap = osHeapCreate(SQLITE_WIN32_HEAP_FLAGS,
                                      SQLITE_WIN32_HEAP_INIT_SIZE,
                                      SQLITE_WIN32_HEAP_MAX_SIZE);
    if( !pWinMemData->hHeap ){
      sqlite3_log(SQLITE_NOMEM,
          "failed to HeapCreate (%lu), flags=%u, initSize=%u, maxSize=%u",
          osGetLastError(), SQLITE_WIN32_HEAP_FLAGS,
          SQLITE_WIN32_HEAP_INIT_SIZE, SQLITE_WIN32_HEAP_MAX_SIZE);
      return SQLITE_NOMEM;
    }
    pWinMemData->bOwned = TRUE;
    assert( pWinMemData->bOwned );
  }
#else
  pWinMemData->hHeap = osGetProcessHeap();
  if( !pWinMemData->hHeap ){
    sqlite3_log(SQLITE_NOMEM,
        "failed to GetProcessHeap (%lu)", osGetLastError());
    return SQLITE_NOMEM;
  }
  pWinMemData->bOwned = FALSE;
  assert( !pWinMemData->bOwned );
#endif
  assert( pWinMemData->hHeap!=0 );
  assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
................................................................................
  if( pWinMemData->hHeap ){
    assert( pWinMemData->hHeap!=INVALID_HANDLE_VALUE );
#if !SQLITE_OS_WINRT && defined(SQLITE_WIN32_MALLOC_VALIDATE)
    assert( osHeapValidate(pWinMemData->hHeap, SQLITE_WIN32_HEAP_FLAGS, NULL) );
#endif
    if( pWinMemData->bOwned ){
      if( !osHeapDestroy(pWinMemData->hHeap) ){
        sqlite3_log(SQLITE_NOMEM, "failed to HeapDestroy (%lu), heap=%p",
                    osGetLastError(), (void*)pWinMemData->hHeap);
      }
      pWinMemData->bOwned = FALSE;
    }
    pWinMemData->hHeap = NULL;
  }
}
................................................................................
**
** This is not a VFS shared-memory method; it is a utility function called
** by VFS shared-memory methods.
*/
static void winShmPurge(sqlite3_vfs *pVfs, int deleteFlag){
  winShmNode **pp;
  winShmNode *p;

  assert( winShmMutexHeld() );
  OSTRACE(("SHM-PURGE pid=%lu, deleteFlag=%d\n",
           osGetCurrentProcessId(), deleteFlag));
  pp = &winShmNodeList;
  while( (p = *pp)!=0 ){
    if( p->nRef==0 ){
      int i;
      if( p->mutex ) sqlite3_mutex_free(p->mutex);
      for(i=0; i<p->nRegion; i++){
        BOOL bRc = osUnmapViewOfFile(p->aRegion[i].pMap);
        OSTRACE(("SHM-PURGE-UNMAP pid=%lu, region=%d, rc=%s\n",
                 osGetCurrentProcessId(), i, bRc ? "ok" : "failed"));
        UNUSED_VARIABLE_VALUE(bRc);
        bRc = osCloseHandle(p->aRegion[i].hMap);
        OSTRACE(("SHM-PURGE-CLOSE pid=%lu, region=%d, rc=%s\n",
                 osGetCurrentProcessId(), i, bRc ? "ok" : "failed"));
        UNUSED_VARIABLE_VALUE(bRc);
      }
      if( p->hFile.h!=NULL && p->hFile.h!=INVALID_HANDLE_VALUE ){
        SimulateIOErrorBenign(1);
        winClose((sqlite3_file *)&p->hFile);
        SimulateIOErrorBenign(0);
      }
      if( deleteFlag ){
................................................................................
/****************************************************************************
**************************** sqlite3_vfs methods ****************************
**
** This division contains the implementation of methods on the
** sqlite3_vfs object.
*/

#if 0
/*
** Convert a filename from whatever the underlying operating system
** supports for filenames into UTF-8.  Space to hold the result is
** obtained from malloc and must be freed by the calling function.
*/
static char *winConvertToUtf8Filename(const void *zFilename){
  char *zConverted = 0;
................................................................................
  else{
    zConverted = sqlite3_win32_mbcs_to_utf8(zFilename);
  }
#endif
  /* caller will handle out of memory */
  return zConverted;
}
#endif

/*
** Convert a UTF-8 filename into whatever form the underlying
** operating system wants filenames in.  Space to hold the result
** is obtained from malloc and must be freed by the calling
** function.
*/

Changes to src/parse.y

1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089

1090
1091
1092
1093
1094
1095
1096
    A.zStart = B.z;
    A.zEnd = &E.z[E.n];
  }
%endif SQLITE_OMIT_SUBQUERY

/* CASE expressions */
expr(A) ::= CASE(C) case_operand(X) case_exprlist(Y) case_else(Z) END(E). {
  A.pExpr = sqlite3PExpr(pParse, TK_CASE, X, Z, 0);
  if( A.pExpr ){
    A.pExpr->x.pList = Y;
    sqlite3ExprSetHeight(pParse, A.pExpr);
  }else{
    sqlite3ExprListDelete(pParse->db, Y);

  }
  A.zStart = C.z;
  A.zEnd = &E.z[E.n];
}
%type case_exprlist {ExprList*}
%destructor case_exprlist {sqlite3ExprListDelete(pParse->db, $$);}
case_exprlist(A) ::= case_exprlist(X) WHEN expr(Y) THEN expr(Z). {







|

|



>







1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
    A.zStart = B.z;
    A.zEnd = &E.z[E.n];
  }
%endif SQLITE_OMIT_SUBQUERY

/* CASE expressions */
expr(A) ::= CASE(C) case_operand(X) case_exprlist(Y) case_else(Z) END(E). {
  A.pExpr = sqlite3PExpr(pParse, TK_CASE, X, 0, 0);
  if( A.pExpr ){
    A.pExpr->x.pList = Z ? sqlite3ExprListAppend(pParse,Y,Z) : Y;
    sqlite3ExprSetHeight(pParse, A.pExpr);
  }else{
    sqlite3ExprListDelete(pParse->db, Y);
    sqlite3ExprDelete(pParse->db, Z);
  }
  A.zStart = C.z;
  A.zEnd = &E.z[E.n];
}
%type case_exprlist {ExprList*}
%destructor case_exprlist {sqlite3ExprListDelete(pParse->db, $$);}
case_exprlist(A) ::= case_exprlist(X) WHEN expr(Y) THEN expr(Z). {

Changes to src/pragma.c

9
10
11
12
13
14
15





































































































































































































































16
17
18
19
20
21
22
...
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
...
344
345
346
347
348
349
350
351
352


353
354
355
356
357
358
359
...
401
402
403
404
405
406
407


408
409
410
411
412
413
414












415

416
417





418
419
420
421
422
423
424
...
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
...
460
461
462
463
464
465
466
467

468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
...
488
489
490
491
492
493
494
495

496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
...
513
514
515
516
517
518
519
520

521
522
523
524
525
526
527
...
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555

556
557
558
559
560
561
562
563
564
565
566
567
568
...
587
588
589
590
591
592
593

594
595
596
597
598
599
600
601
602

603
604
605
606
607
608
609
610
611
612
613
614
615
616
...
645
646
647
648
649
650
651
652

653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669

670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
...
724
725
726
727
728
729
730
731

732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
...
748
749
750
751
752
753
754
755

756
757
758
759
760
761
762
...
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780

781
782
783
784
785
786
787
...
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
...
816
817
818
819
820
821
822
823

824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842

843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
...
880
881
882
883
884
885
886
887

888
889
890
891
892
893
894
...
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
...
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939

940
941
942
943
944
945
946
947
948
949

950
951
952
953
954
955
956
...
973
974
975
976
977
978
979
980

981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005

1006
1007
1008
1009
1010



1011























1012
1013
1014
1015
1016
1017
1018
....
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
....
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075



1076
1077
1078
1079
1080
1081
1082
....
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100



1101
1102
1103
1104
1105
1106
1107
....
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128



1129
1130
1131
1132
1133
1134
1135
....
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147



1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160

1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
....
1200
1201
1202
1203
1204
1205
1206
1207

1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
....
1315
1316
1317
1318
1319
1320
1321
1322

1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335

1336
1337
1338
1339
1340
1341
1342
1343
1344
1345

1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
....
1511
1512
1513
1514
1515
1516
1517
1518

1519
1520
1521
1522
1523
1524
1525
....
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
....
1584
1585
1586
1587
1588
1589
1590
1591

1592
1593
1594
1595
1596
1597
1598
....
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
....
1666
1667
1668
1669
1670
1671
1672
1673

1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693

1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
....
1714
1715
1716
1717
1718
1719
1720
1721

1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738

1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749

1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760

1761
1762
1763
1764
1765

















1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
....
1789
1790
1791
1792
1793
1794
1795

1796
1797
1798
1799
1800
1801
1802
1803
1804


1805
1806
1807
1808



1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821



1822
1823
1824

1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835


1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
*/
#include "sqliteInt.h"






































































































































































































































/*
** Interpret the given string as a safety level.  Return 0 for OFF,
** 1 for ON or NORMAL and 2 for FULL.  Return 1 for an empty or 
** unrecognized string argument.  The FULL option is disallowed
** if the omitFull parameter it 1.
**
** Note that the values returned are one less that the values that
................................................................................
  }
}
#else
# define setAllPagerFlags(X)  /* no-op */
#endif


#ifndef SQLITE_OMIT_FLAG_PRAGMAS
/*
** Check to see if zRight and zLeft refer to a pragma that queries
** or changes one of the flags in db->flags.  Return 1 if so and 0 if not.
** Also, implement the pragma.
*/
static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){
  static const struct sPragmaType {
    const char *zName;  /* Name of the pragma */
    int mask;           /* Mask for the db->flags value */
  } aPragma[] = {
    { "full_column_names",        SQLITE_FullColNames  },
    { "short_column_names",       SQLITE_ShortColNames },
    { "count_changes",            SQLITE_CountRows     },
    { "empty_result_callbacks",   SQLITE_NullCallback  },
    { "legacy_file_format",       SQLITE_LegacyFileFmt },
    { "fullfsync",                SQLITE_FullFSync     },
    { "checkpoint_fullfsync",     SQLITE_CkptFullFSync },
    { "cache_spill",              SQLITE_CacheSpill    },
    { "reverse_unordered_selects", SQLITE_ReverseOrder  },
    { "query_only",               SQLITE_QueryOnly     },
#ifndef SQLITE_OMIT_AUTOMATIC_INDEX
    { "automatic_index",          SQLITE_AutoIndex     },
#endif
#ifdef SQLITE_DEBUG
    { "sql_trace",                SQLITE_SqlTrace      },
    { "vdbe_listing",             SQLITE_VdbeListing   },
    { "vdbe_trace",               SQLITE_VdbeTrace     },
    { "vdbe_addoptrace",          SQLITE_VdbeAddopTrace},
    { "vdbe_debug",    SQLITE_SqlTrace | SQLITE_VdbeListing
                               | SQLITE_VdbeTrace      },
#endif
#ifndef SQLITE_OMIT_CHECK
    { "ignore_check_constraints", SQLITE_IgnoreChecks  },
#endif
    /* The following is VERY experimental */
    { "writable_schema",          SQLITE_WriteSchema|SQLITE_RecoveryMode },

    /* TODO: Maybe it shouldn't be possible to change the ReadUncommitted
    ** flag if there are any active statements. */
    { "read_uncommitted",         SQLITE_ReadUncommitted },
    { "recursive_triggers",       SQLITE_RecTriggers   },

    /* This flag may only be set if both foreign-key and trigger support
    ** are present in the build.  */
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
    { "foreign_keys",             SQLITE_ForeignKeys   },
    { "defer_foreign_keys",       SQLITE_DeferFKs      },
#endif
  };
  int i;
  const struct sPragmaType *p;
  for(i=0, p=aPragma; i<ArraySize(aPragma); i++, p++){
    if( sqlite3StrICmp(zLeft, p->zName)==0 ){
      sqlite3 *db = pParse->db;
      Vdbe *v;
      v = sqlite3GetVdbe(pParse);
      assert( v!=0 );  /* Already allocated by sqlite3Pragma() */
      if( ALWAYS(v) ){
        if( zRight==0 ){
          returnSingleInt(pParse, p->zName, (db->flags & p->mask)!=0 );
        }else{
          int mask = p->mask;          /* 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( sqlite3GetBoolean(zRight, 0) ){
            db->flags |= mask;
          }else{
            db->flags &= ~mask;
            if( mask==SQLITE_DeferFKs ) db->nDeferredImmCons = 0;
          }

          /* Many of the flag-pragmas modify the code generated by the SQL 
          ** compiler (eg. count_changes). So add an opcode to expire all
          ** compiled SQL statements after modifying a pragma value.
          */
          sqlite3VdbeAddOp2(v, OP_Expire, 0, 0);
        }
      }

      return 1;
    }
  }
  return 0;
}
#endif /* SQLITE_OMIT_FLAG_PRAGMAS */

/*
** Return a human-readable name for a constraint resolution action.
*/
#ifndef SQLITE_OMIT_FOREIGN_KEY
static const char *actionName(u8 action){
  const char *zName;
  switch( action ){
................................................................................
  Token *pValue,      /* Token for <value>, or NULL */
  int minusFlag       /* True if a '-' sign preceded <value> */
){
  char *zLeft = 0;       /* Nul-terminated UTF-8 string <id> */
  char *zRight = 0;      /* Nul-terminated UTF-8 string <value>, or NULL */
  const char *zDb = 0;   /* The database name */
  Token *pId;            /* Pointer to <id> token */
  int iDb;               /* Database index for <database> */
  char *aFcntl[4];       /* Argument to SQLITE_FCNTL_PRAGMA */


  int rc;                      /* return value form SQLITE_FCNTL_PRAGMA */
  sqlite3 *db = pParse->db;    /* The database connection */
  Db *pDb;                     /* The specific database being pragmaed */
  Vdbe *v = sqlite3GetVdbe(pParse);  /* Prepared statement */

  if( v==0 ) return;
  sqlite3VdbeRunOnlyOnce(v);
................................................................................
      int mem = ++pParse->nMem;
      sqlite3VdbeAddOp4(v, OP_String8, 0, mem, 0, aFcntl[0], 0);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "result", SQLITE_STATIC);
      sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
      sqlite3_free(aFcntl[0]);
    }


  }else if( rc!=SQLITE_NOTFOUND ){
    if( aFcntl[0] ){
      sqlite3ErrorMsg(pParse, "%s", aFcntl[0]);
      sqlite3_free(aFcntl[0]);
    }
    pParse->nErr++;
    pParse->rc = rc;












  }else

                            
 





#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
  /*
  **  PRAGMA [database.]default_cache_size
  **  PRAGMA [database.]default_cache_size=N
  **
  ** The first form reports the current persistent setting for the
  ** page cache size.  The value returned is the maximum number of
................................................................................
  **
  ** Older versions of SQLite would set the default cache size to a
  ** negative number to indicate synchronous=OFF.  These days, synchronous
  ** is always on by default regardless of the sign of the default cache
  ** size.  But continue to take the absolute value of the default cache
  ** size of historical compatibility.
  */
  if( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
    static const VdbeOpList getCacheSize[] = {
      { OP_Transaction, 0, 0,        0},                         /* 0 */
      { OP_ReadCookie,  0, 1,        BTREE_DEFAULT_CACHE_SIZE},  /* 1 */
      { OP_IfPos,       1, 8,        0},
      { OP_Integer,     0, 2,        0},
      { OP_Subtract,    1, 2,        1},
      { OP_IfPos,       1, 8,        0},
................................................................................
      sqlite3BeginWriteOperation(pParse, 0, iDb);
      sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
      sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
      assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
  }else

#endif /* !SQLITE_OMIT_PAGER_PRAGMAS && !SQLITE_OMIT_DEPRECATED */

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  /*
  **  PRAGMA [database.]page_size
  **  PRAGMA [database.]page_size=N
  **
  ** The first form reports the current setting for the
  ** database page size in bytes.  The second form sets the
  ** database page size value.  The value can only be set if
  ** the database has not yet been created.
  */
  if( sqlite3StrICmp(zLeft,"page_size")==0 ){
    Btree *pBt = pDb->pBt;
    assert( pBt!=0 );
    if( !zRight ){
      int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
      returnSingleInt(pParse, "page_size", size);
    }else{
      /* Malloc may fail when setting the page-size, as there is an internal
................................................................................
      ** buffer that the pager module resizes using sqlite3_realloc().
      */
      db->nextPagesize = sqlite3Atoi(zRight);
      if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize,-1,0) ){
        db->mallocFailed = 1;
      }
    }
  }else


  /*
  **  PRAGMA [database.]secure_delete
  **  PRAGMA [database.]secure_delete=ON/OFF
  **
  ** The first form reports the current setting for the
  ** secure_delete flag.  The second form changes the secure_delete
  ** flag setting and reports thenew value.
  */
  if( sqlite3StrICmp(zLeft,"secure_delete")==0 ){
    Btree *pBt = pDb->pBt;
    int b = -1;
    assert( pBt!=0 );
    if( zRight ){
      b = sqlite3GetBoolean(zRight, 0);
    }
    if( pId2->n==0 && b>=0 ){
................................................................................
      int ii;
      for(ii=0; ii<db->nDb; ii++){
        sqlite3BtreeSecureDelete(db->aDb[ii].pBt, b);
      }
    }
    b = sqlite3BtreeSecureDelete(pBt, b);
    returnSingleInt(pParse, "secure_delete", b);
  }else


  /*
  **  PRAGMA [database.]max_page_count
  **  PRAGMA [database.]max_page_count=N
  **
  ** The first form reports the current setting for the
  ** maximum number of pages in the database file.  The 
................................................................................
  ** change.  The only purpose is to provide an easy way to test
  ** the sqlite3AbsInt32() function.
  **
  **  PRAGMA [database.]page_count
  **
  ** Return the number of pages in the specified database.
  */
  if( sqlite3StrICmp(zLeft,"page_count")==0
   || sqlite3StrICmp(zLeft,"max_page_count")==0
  ){
    int iReg;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3CodeVerifySchema(pParse, iDb);
    iReg = ++pParse->nMem;
    if( sqlite3Tolower(zLeft[0])=='p' ){
      sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
    }else{
      sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, 
                        sqlite3AbsInt32(sqlite3Atoi(zRight)));
    }
    sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
  }else


  /*
  **  PRAGMA [database.]locking_mode
  **  PRAGMA [database.]locking_mode = (normal|exclusive)
  */
  if( sqlite3StrICmp(zLeft,"locking_mode")==0 ){
    const char *zRet = "normal";
    int eMode = getLockingMode(zRight);

    if( pId2->n==0 && eMode==PAGER_LOCKINGMODE_QUERY ){
      /* Simple "PRAGMA locking_mode;" statement. This is a query for
      ** the current default locking mode (which may be different to
      ** the locking-mode of the main database).
................................................................................
        }
        db->dfltLockMode = (u8)eMode;
      }
      pPager = sqlite3BtreePager(pDb->pBt);
      eMode = sqlite3PagerLockingMode(pPager, eMode);
    }


    assert(eMode==PAGER_LOCKINGMODE_NORMAL||eMode==PAGER_LOCKINGMODE_EXCLUSIVE);
    if( eMode==PAGER_LOCKINGMODE_EXCLUSIVE ){
      zRet = "exclusive";
    }
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "locking_mode", SQLITE_STATIC);
    sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zRet, 0);
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
  }else


  /*
  **  PRAGMA [database.]journal_mode
  **  PRAGMA [database.]journal_mode =
  **                      (delete|persist|off|truncate|memory|wal|off)
  */
  if( sqlite3StrICmp(zLeft,"journal_mode")==0 ){
    int eMode;        /* One of the PAGER_JOURNALMODE_XXX symbols */
    int ii;           /* Loop counter */

    /* Force the schema to be loaded on all databases.  This causes all
    ** database files to be opened and the journal_modes set.  This is
    ** necessary because subsequent processing must know if the databases
    ** are in WAL mode. */
................................................................................
    for(ii=db->nDb-1; ii>=0; ii--){
      if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){
        sqlite3VdbeUsesBtree(v, ii);
        sqlite3VdbeAddOp3(v, OP_JournalMode, ii, 1, eMode);
      }
    }
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
  }else


  /*
  **  PRAGMA [database.]journal_size_limit
  **  PRAGMA [database.]journal_size_limit=N
  **
  ** Get or set the size limit on rollback journal files.
  */
  if( sqlite3StrICmp(zLeft,"journal_size_limit")==0 ){
    Pager *pPager = sqlite3BtreePager(pDb->pBt);
    i64 iLimit = -2;
    if( zRight ){
      sqlite3Atoi64(zRight, &iLimit, sqlite3Strlen30(zRight), SQLITE_UTF8);
      if( iLimit<-1 ) iLimit = -1;
    }
    iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit);
    returnSingleInt(pParse, "journal_size_limit", iLimit);
  }else


#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

  /*
  **  PRAGMA [database.]auto_vacuum
  **  PRAGMA [database.]auto_vacuum=N
  **
  ** Get or set the value of the database 'auto-vacuum' parameter.
  ** The value is one of:  0 NONE 1 FULL 2 INCREMENTAL
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
    Btree *pBt = pDb->pBt;
    assert( pBt!=0 );
    if( sqlite3ReadSchema(pParse) ){
      goto pragma_out;
    }
    if( !zRight ){
      int auto_vacuum;
................................................................................
          sqlite3VdbeChangeP2(v, iAddr+2, iAddr+4);
          sqlite3VdbeChangeP1(v, iAddr+4, eAuto-1);
          sqlite3VdbeChangeP1(v, iAddr+5, iDb);
          sqlite3VdbeUsesBtree(v, iDb);
        }
      }
    }
  }else

#endif

  /*
  **  PRAGMA [database.]incremental_vacuum(N)
  **
  ** Do N steps of incremental vacuuming on a database.
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  if( sqlite3StrICmp(zLeft,"incremental_vacuum")==0 ){
    int iLimit, addr;
    if( sqlite3ReadSchema(pParse) ){
      goto pragma_out;
    }
    if( zRight==0 || !sqlite3GetInt32(zRight, &iLimit) || iLimit<=0 ){
      iLimit = 0x7fffffff;
    }
................................................................................
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    sqlite3VdbeAddOp2(v, OP_Integer, iLimit, 1);
    addr = sqlite3VdbeAddOp1(v, OP_IncrVacuum, iDb);
    sqlite3VdbeAddOp1(v, OP_ResultRow, 1);
    sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1);
    sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr);
    sqlite3VdbeJumpHere(v, addr);
  }else

#endif

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
  /*
  **  PRAGMA [database.]cache_size
  **  PRAGMA [database.]cache_size=N
  **
................................................................................
  ** The first form reports the current local setting for the
  ** page cache size. The second form sets the local
  ** page cache size value.  If N is positive then that is the
  ** number of pages in the cache.  If N is negative, then the
  ** number of pages is adjusted so that the cache uses -N kibibytes
  ** of memory.
  */
  if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
    if( !zRight ){
      returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
    }else{
      int size = sqlite3Atoi(zRight);
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
  }else


  /*
  **  PRAGMA [database.]mmap_size(N)
  **
  ** Used to set mapping size limit. The mapping size limit is
  ** used to limit the aggregate size of all memory mapped regions of the
  ** database file. If this parameter is set to zero, then memory mapping
................................................................................
  ** limit determined by sqlite3_config(SQLITE_CONFIG_MMAP_SIZE) is set.
  ** The parameter N is measured in bytes.
  **
  ** This value is advisory.  The underlying VFS is free to memory map
  ** as little or as much as it wants.  Except, if N is set to 0 then the
  ** upper layers will never invoke the xFetch interfaces to the VFS.
  */
  if( sqlite3StrICmp(zLeft,"mmap_size")==0 ){
    sqlite3_int64 sz;
#if SQLITE_MAX_MMAP_SIZE>0
    assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
    if( zRight ){
      int ii;
      sqlite3Atoi64(zRight, &sz, sqlite3Strlen30(zRight), SQLITE_UTF8);
      if( sz<0 ) sz = sqlite3GlobalConfig.szMmap;
................................................................................
#endif
    if( rc==SQLITE_OK ){
      returnSingleInt(pParse, "mmap_size", sz);
    }else if( rc!=SQLITE_NOTFOUND ){
      pParse->nErr++;
      pParse->rc = rc;
    }
  }else


  /*
  **   PRAGMA temp_store
  **   PRAGMA temp_store = "default"|"memory"|"file"
  **
  ** Return or set the local value of the temp_store flag.  Changing
  ** the local value does not make changes to the disk file and the default
  ** value will be restored the next time the database is opened.
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
    if( !zRight ){
      returnSingleInt(pParse, "temp_store", db->temp_store);
    }else{
      changeTempStorage(pParse, zRight);
    }
  }else


  /*
  **   PRAGMA temp_store_directory
  **   PRAGMA temp_store_directory = ""|"directory_name"
  **
  ** Return or set the local value of the temp_store_directory flag.  Changing
  ** the value sets a specific directory to be used for temporary files.
  ** Setting to a null string reverts to the default temporary directory search.
  ** If temporary directory is changed, then invalidateTempStorage.
  **
  */
  if( sqlite3StrICmp(zLeft, "temp_store_directory")==0 ){
    if( !zRight ){
      if( sqlite3_temp_directory ){
        sqlite3VdbeSetNumCols(v, 1);
        sqlite3VdbeSetColName(v, 0, COLNAME_NAME, 
            "temp_store_directory", SQLITE_STATIC);
        sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_temp_directory, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
................................................................................
      if( zRight[0] ){
        sqlite3_temp_directory = sqlite3_mprintf("%s", zRight);
      }else{
        sqlite3_temp_directory = 0;
      }
#endif /* SQLITE_OMIT_WSD */
    }
  }else


#if SQLITE_OS_WIN
  /*
  **   PRAGMA data_store_directory
  **   PRAGMA data_store_directory = ""|"directory_name"
  **
  ** Return or set the local value of the data_store_directory flag.  Changing
................................................................................
  ** were specified with a relative pathname.  Setting to a null string reverts
  ** to the default database directory, which for database files specified with
  ** a relative path will probably be based on the current directory for the
  ** process.  Database file specified with an absolute path are not impacted
  ** by this setting, regardless of its value.
  **
  */
  if( sqlite3StrICmp(zLeft, "data_store_directory")==0 ){
    if( !zRight ){
      if( sqlite3_data_directory ){
        sqlite3VdbeSetNumCols(v, 1);
        sqlite3VdbeSetColName(v, 0, COLNAME_NAME, 
            "data_store_directory", SQLITE_STATIC);
        sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_data_directory, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
................................................................................
      if( zRight[0] ){
        sqlite3_data_directory = sqlite3_mprintf("%s", zRight);
      }else{
        sqlite3_data_directory = 0;
      }
#endif /* SQLITE_OMIT_WSD */
    }
  }else
#endif

#if !defined(SQLITE_ENABLE_LOCKING_STYLE)
#  if defined(__APPLE__)
#    define SQLITE_ENABLE_LOCKING_STYLE 1
#  else
#    define SQLITE_ENABLE_LOCKING_STYLE 0
#  endif
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
  /*
   **   PRAGMA [database.]lock_proxy_file
   **   PRAGMA [database.]lock_proxy_file = ":auto:"|"lock_file_path"
   **
   ** Return or set the value of the lock_proxy_file flag.  Changing
   ** the value sets a specific file to be used for database access locks.
   **
   */
  if( sqlite3StrICmp(zLeft, "lock_proxy_file")==0 ){

    if( !zRight ){
      Pager *pPager = sqlite3BtreePager(pDb->pBt);
      char *proxy_file_path = NULL;
      sqlite3_file *pFile = sqlite3PagerFile(pPager);
      sqlite3OsFileControlHint(pFile, SQLITE_GET_LOCKPROXYFILE, 
                           &proxy_file_path);
      
................................................................................
                                     NULL);
      }
      if( res!=SQLITE_OK ){
        sqlite3ErrorMsg(pParse, "failed to set lock proxy file");
        goto pragma_out;
      }
    }
  }else

#endif /* SQLITE_ENABLE_LOCKING_STYLE */      
    
  /*
  **   PRAGMA [database.]synchronous
  **   PRAGMA [database.]synchronous=OFF|ON|NORMAL|FULL
  **
  ** Return or set the local value of the synchronous flag.  Changing
  ** the local value does not make changes to the disk file and the
  ** default value will be restored the next time the database is
  ** opened.
  */
  if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    if( !zRight ){
      returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
    }else{
      if( !db->autoCommit ){
        sqlite3ErrorMsg(pParse, 
            "Safety level may not be changed inside a transaction");
      }else{
        pDb->safety_level = getSafetyLevel(zRight,0,1)+1;
        setAllPagerFlags(db);
      }
    }
  }else

#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

#ifndef SQLITE_OMIT_FLAG_PRAGMAS
  if( flagPragma(pParse, zLeft, zRight) ){
    setAllPagerFlags(db);



  }else























#endif /* SQLITE_OMIT_FLAG_PRAGMAS */

#ifndef SQLITE_OMIT_SCHEMA_PRAGMAS
  /*
  **   PRAGMA table_info(<table>)
  **
  ** Return a single row for each column of the named table. The columns of
................................................................................
  **
  ** cid:        Column id (numbered from left to right, starting at 0)
  ** name:       Column name
  ** type:       Column declaration type.
  ** notnull:    True if 'NOT NULL' is part of column declaration
  ** dflt_value: The default value for the column, if any.
  */
  if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      int i, k;
      int nHidden = 0;
      Column *pCol;
................................................................................
        }else{
          for(k=1; ALWAYS(k<=pTab->nCol) && pPk->aiColumn[k-1]!=i; k++){}
        }
        sqlite3VdbeAddOp2(v, OP_Integer, k, 6);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "index_info")==0 && zRight ){



    Index *pIdx;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pIdx = sqlite3FindIndex(db, zRight, zDb);
    if( pIdx ){
      int i;
      pTab = pIdx->pTable;
................................................................................
        sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
        sqlite3VdbeAddOp2(v, OP_Integer, cnum, 2);
        assert( pTab->nCol>cnum );
        sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, pTab->aCol[cnum].zName, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "index_list")==0 && zRight ){



    Index *pIdx;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pIdx = pTab->pIndex;
................................................................................
          sqlite3VdbeAddOp2(v, OP_Integer, pIdx->onError!=OE_None, 3);
          sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
          ++i;
          pIdx = pIdx->pNext;
        }
      }
    }
  }else

  if( sqlite3StrICmp(zLeft, "database_list")==0 ){



    int i;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3VdbeSetNumCols(v, 3);
    pParse->nMem = 3;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "file", SQLITE_STATIC);
................................................................................
      assert( db->aDb[i].zName!=0 );
      sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, db->aDb[i].zName, 0);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0,
           sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
    }
  }else

  if( sqlite3StrICmp(zLeft, "collation_list")==0 ){



    int i = 0;
    HashElem *p;
    sqlite3VdbeSetNumCols(v, 2);
    pParse->nMem = 2;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", SQLITE_STATIC);
    for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
      CollSeq *pColl = (CollSeq *)sqliteHashData(p);
      sqlite3VdbeAddOp2(v, OP_Integer, i++, 1);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, pColl->zName, 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
    }
  }else

#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */

#ifndef SQLITE_OMIT_FOREIGN_KEY
  if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 && zRight ){
    FKey *pFK;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pFK = pTab->pFKey;
................................................................................
            sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 8);
          }
          ++i;
          pFK = pFK->pNextFrom;
        }
      }
    }
  }else

#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */

#ifndef SQLITE_OMIT_FOREIGN_KEY
#ifndef SQLITE_OMIT_TRIGGER
  if( sqlite3StrICmp(zLeft, "foreign_key_check")==0 ){
    FKey *pFK;             /* A foreign key constraint */
    Table *pTab;           /* Child table contain "REFERENCES" keyword */
    Table *pParent;        /* Parent table that child points to */
    Index *pIdx;           /* Index in the parent table */
    int i;                 /* Loop counter:  Foreign key number for pTab */
    int j;                 /* Loop counter:  Field of the foreign key */
    HashElem *k;           /* Loop counter:  Next table in schema */
................................................................................
        sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
        sqlite3VdbeResolveLabel(v, addrOk);
        sqlite3DbFree(db, aiCols);
      }
      sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1);
      sqlite3VdbeJumpHere(v, addrTop);
    }
  }else

#endif /* !defined(SQLITE_OMIT_TRIGGER) */
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */

#ifndef NDEBUG
  if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
    if( zRight ){
      if( sqlite3GetBoolean(zRight, 0) ){
        sqlite3ParserTrace(stderr, "parser: ");
      }else{
        sqlite3ParserTrace(0, 0);
      }
    }
  }else

#endif

  /* Reinstall the LIKE and GLOB functions.  The variant of LIKE
  ** used will be case sensitive or not depending on the RHS.
  */
  if( sqlite3StrICmp(zLeft, "case_sensitive_like")==0 ){
    if( zRight ){
      sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight, 0));
    }
  }else


#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX
# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100
#endif

#ifndef SQLITE_OMIT_INTEGRITY_CHECK
  /* Pragma "quick_check" is reduced version of 
  ** integrity_check designed to detect most database corruption
  ** without most of the overhead of a full integrity-check.
  */
  if( sqlite3StrICmp(zLeft, "integrity_check")==0
   || sqlite3StrICmp(zLeft, "quick_check")==0 
  ){
    int i, j, addr, mxErr;

    /* Code that appears at the end of the integrity check.  If no error
    ** messages have been generated, output OK.  Otherwise output the
    ** error message
    */
    static const VdbeOpList endCode[] = {
................................................................................
#endif /* SQLITE_OMIT_BTREECOUNT */
      } 
    }
    addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
    sqlite3VdbeChangeP2(v, addr, -mxErr);
    sqlite3VdbeJumpHere(v, addr+1);
    sqlite3VdbeChangeP4(v, addr+2, "ok", P4_STATIC);
  }else

#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

#ifndef SQLITE_OMIT_UTF16
  /*
  **   PRAGMA encoding
  **   PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
  **
................................................................................
  ** the main database has not been initialized and/or created when ATTACH
  ** is executed, this is done before the ATTACH operation.
  **
  ** In the second form this pragma sets the text encoding to be used in
  ** new database files created using this database handle. It is only
  ** useful if invoked immediately after the main database i
  */
  if( sqlite3StrICmp(zLeft, "encoding")==0 ){
    static const struct EncName {
      char *zName;
      u8 enc;
    } encnames[] = {
      { "UTF8",     SQLITE_UTF8        },
      { "UTF-8",    SQLITE_UTF8        },  /* Must be element [1] */
      { "UTF-16le", SQLITE_UTF16LE     },  /* Must be element [2] */
................................................................................
          }
        }
        if( !pEnc->zName ){
          sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
        }
      }
    }
  }else

#endif /* SQLITE_OMIT_UTF16 */

#ifndef SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS
  /*
  **   PRAGMA [database.]schema_version
  **   PRAGMA [database.]schema_version = <integer>
  **
................................................................................
  ** Subverting this mechanism by using "PRAGMA schema_version" to modify
  ** the schema-version is potentially dangerous and may lead to program
  ** crashes or database corruption. Use with caution!
  **
  ** The user-version is not used internally by SQLite. It may be used by
  ** applications for any purpose.
  */
  if( sqlite3StrICmp(zLeft, "schema_version")==0 
   || sqlite3StrICmp(zLeft, "user_version")==0 
   || sqlite3StrICmp(zLeft, "freelist_count")==0 
   || sqlite3StrICmp(zLeft, "application_id")==0 
  ){
    int iCookie;   /* Cookie index. 1 for schema-cookie, 6 for user-cookie. */
    sqlite3VdbeUsesBtree(v, iDb);
    switch( zLeft[0] ){
      case 'a': case 'A':
        iCookie = BTREE_APPLICATION_ID;
        break;
      case 'f': case 'F':
................................................................................
      int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, iDb);
      sqlite3VdbeChangeP3(v, addr+1, iCookie);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
    }
  }else

#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
  /*
  **   PRAGMA compile_options
  **
  ** Return the names of all compile-time options used in this build,
  ** one option per row.
  */
  if( sqlite3StrICmp(zLeft, "compile_options")==0 ){
    int i = 0;
    const char *zOpt;
    sqlite3VdbeSetNumCols(v, 1);
    pParse->nMem = 1;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "compile_option", SQLITE_STATIC);
    while( (zOpt = sqlite3_compileoption_get(i++))!=0 ){
      sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zOpt, 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
    }
  }else

#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */

#ifndef SQLITE_OMIT_WAL
  /*
  **   PRAGMA [database.]wal_checkpoint = passive|full|restart
  **
  ** Checkpoint the database.
  */
  if( sqlite3StrICmp(zLeft, "wal_checkpoint")==0 ){
    int iBt = (pId2->z?iDb:SQLITE_MAX_ATTACHED);
    int eMode = SQLITE_CHECKPOINT_PASSIVE;
    if( zRight ){
      if( sqlite3StrICmp(zRight, "full")==0 ){
        eMode = SQLITE_CHECKPOINT_FULL;
      }else if( sqlite3StrICmp(zRight, "restart")==0 ){
        eMode = SQLITE_CHECKPOINT_RESTART;
................................................................................
    pParse->nMem = 3;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "busy", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "log", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "checkpointed", SQLITE_STATIC);

    sqlite3VdbeAddOp3(v, OP_Checkpoint, iBt, eMode, 1);
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
  }else


  /*
  **   PRAGMA wal_autocheckpoint
  **   PRAGMA wal_autocheckpoint = N
  **
  ** Configure a database connection to automatically checkpoint a database
  ** after accumulating N frames in the log. Or query for the current value
  ** of N.
  */
  if( sqlite3StrICmp(zLeft, "wal_autocheckpoint")==0 ){
    if( zRight ){
      sqlite3_wal_autocheckpoint(db, sqlite3Atoi(zRight));
    }
    returnSingleInt(pParse, "wal_autocheckpoint", 
       db->xWalCallback==sqlite3WalDefaultHook ? 
           SQLITE_PTR_TO_INT(db->pWalArg) : 0);
  }else

#endif

  /*
  **  PRAGMA shrink_memory
  **
  ** This pragma attempts to free as much memory as possible from the
  ** current database connection.
  */
  if( sqlite3StrICmp(zLeft, "shrink_memory")==0 ){
    sqlite3_db_release_memory(db);
  }else


  /*
  **   PRAGMA busy_timeout
  **   PRAGMA busy_timeout = N
  **
  ** Call sqlite3_busy_timeout(db, N).  Return the current timeout value
  ** if one is set.  If no busy handler or a different busy handler is set
  ** then 0 is returned.  Setting the busy_timeout to 0 or negative
  ** disables the timeout.
  */
  if( sqlite3StrICmp(zLeft, "busy_timeout")==0 ){

    if( zRight ){
      sqlite3_busy_timeout(db, sqlite3Atoi(zRight));
    }
    returnSingleInt(pParse, "timeout",  db->busyTimeout);
  }else


















#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
  /*
  ** Report the current state of file logs for all databases
  */
  if( sqlite3StrICmp(zLeft, "lock_status")==0 ){
    static const char *const azLockName[] = {
      "unlocked", "shared", "reserved", "pending", "exclusive"
    };
    int i;
    sqlite3VdbeSetNumCols(v, 2);
    pParse->nMem = 2;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "database", SQLITE_STATIC);
................................................................................
      }else if( sqlite3_file_control(db, i ? db->aDb[i].zName : 0, 
                                     SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){
         zState = azLockName[j];
      }
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, zState, P4_STATIC);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
    }


  }else
#endif

#ifdef SQLITE_HAS_CODEC
  if( sqlite3StrICmp(zLeft, "key")==0 && zRight ){
    sqlite3_key_v2(db, zDb, zRight, sqlite3Strlen30(zRight));
  }else
  if( sqlite3StrICmp(zLeft, "rekey")==0 && zRight ){


    sqlite3_rekey_v2(db, zDb, zRight, sqlite3Strlen30(zRight));
  }else
  if( zRight && (sqlite3StrICmp(zLeft, "hexkey")==0 ||
                 sqlite3StrICmp(zLeft, "hexrekey")==0) ){



    int i, h1, h2;
    char zKey[40];
    for(i=0; (h1 = zRight[i])!=0 && (h2 = zRight[i+1])!=0; i+=2){
      h1 += 9*(1&(h1>>6));
      h2 += 9*(1&(h2>>6));
      zKey[i/2] = (h2 & 0x0f) | ((h1 & 0xf)<<4);
    }
    if( (zLeft[3] & 0xf)==0xb ){
      sqlite3_key_v2(db, zDb, zKey, i/2);
    }else{
      sqlite3_rekey_v2(db, zDb, zKey, i/2);
    }
  }else



#endif
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
  if( sqlite3StrICmp(zLeft, "activate_extensions")==0 && zRight ){

#ifdef SQLITE_HAS_CODEC
    if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){
      sqlite3_activate_see(&zRight[4]);
    }
#endif
#ifdef SQLITE_ENABLE_CEROD
    if( sqlite3StrNICmp(zRight, "cerod-", 6)==0 ){
      sqlite3_activate_cerod(&zRight[6]);
    }
#endif
  }else


#endif

 
  {/* Empty ELSE clause */}

pragma_out:
  sqlite3DbFree(db, zLeft);
  sqlite3DbFree(db, zRight);
}

#endif /* SQLITE_OMIT_PRAGMA */







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<







 







<

>
>







 







>
>
|






>
>
>
>
>
>
>
>
>
>
>
>
|
>
|
|
>
>
>
>
>







 







|







 







|
>












|







 







|
>









|







 







|
>







 







|
<
<













|
>





|







 







>
|







|
>






|







 







|
>







|








|
>











|







 







|
>








|







 







|
>







 







|









|
>







 







|







 







|
>












|





|
>











|







 







|
>







 







|







 







|
<
|
<
<
<
<
<
<

>


|
|
|
|
|
|
|
<
>







 







|
>











|












|
>



<
|
>
>
>
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







|







 







<
|
<
>
>
>







 







<
|
<
>
>
>







 







<
|
<
>
>
>







 







<
|
<
>
>
>












|
>



|







 







|
>




|







 







|
>




|







|
>





|



|
>










|
<
<







 







|
>







 







|







 







|
>







 







|
<
<
<
<







 







|
>









|









|
>








|







 







|
>









|






|
>








|

|
>










|
>




|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>





|







 







>
|
<



|
|
|
<
>
>
|
<
|
<
>
>
>
|
|
|
|
|
|
|
|
|
|
|
|
<
>
>
>


<
>










<
>
>


<
|







9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
...
413
414
415
416
417
418
419



























































































420
421
422
423
424
425
426
...
482
483
484
485
486
487
488

489
490
491
492
493
494
495
496
497
498
...
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
...
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
...
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
...
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
...
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
...
694
695
696
697
698
699
700
701


702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
...
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
...
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
...
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
...
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
...
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
...
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
...
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
....
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
....
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
....
1094
1095
1096
1097
1098
1099
1100
1101

1102






1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113

1114
1115
1116
1117
1118
1119
1120
1121
....
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175

1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
....
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
....
1258
1259
1260
1261
1262
1263
1264

1265

1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
....
1284
1285
1286
1287
1288
1289
1290

1291

1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
....
1313
1314
1315
1316
1317
1318
1319

1320

1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
....
1333
1334
1335
1336
1337
1338
1339

1340

1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
....
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
....
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557


1558
1559
1560
1561
1562
1563
1564
....
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
....
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
....
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
....
1819
1820
1821
1822
1823
1824
1825
1826




1827
1828
1829
1830
1831
1832
1833
....
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
....
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
....
2009
2010
2011
2012
2013
2014
2015
2016
2017

2018
2019
2020
2021
2022
2023

2024
2025
2026

2027

2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042

2043
2044
2045
2046
2047

2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058

2059
2060
2061
2062

2063
2064
2065
2066
2067
2068
2069
2070
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
*/
#include "sqliteInt.h"

#if !defined(SQLITE_ENABLE_LOCKING_STYLE)
#  if defined(__APPLE__)
#    define SQLITE_ENABLE_LOCKING_STYLE 1
#  else
#    define SQLITE_ENABLE_LOCKING_STYLE 0
#  endif
#endif

/***************************************************************************
** The next block of code, including the PragTyp_XXXX macro definitions and
** the aPragmaName[] object is composed of generated code. DO NOT EDIT.
**
** To add new pragmas, edit the code in ../tool/mkpragmatab.tcl and rerun
** that script.  Then copy/paste the output in place of the following:
*/
#define PragTyp_HEADER_VALUE                   0
#define PragTyp_AUTO_VACUUM                    1
#define PragTyp_FLAG                           2
#define PragTyp_BUSY_TIMEOUT                   3
#define PragTyp_CACHE_SIZE                     4
#define PragTyp_CASE_SENSITIVE_LIKE            5
#define PragTyp_COLLATION_LIST                 6
#define PragTyp_COMPILE_OPTIONS                7
#define PragTyp_DATA_STORE_DIRECTORY           8
#define PragTyp_DATABASE_LIST                  9
#define PragTyp_DEFAULT_CACHE_SIZE            10
#define PragTyp_ENCODING                      11
#define PragTyp_FOREIGN_KEY_CHECK             12
#define PragTyp_FOREIGN_KEY_LIST              13
#define PragTyp_INCREMENTAL_VACUUM            14
#define PragTyp_INDEX_INFO                    15
#define PragTyp_INDEX_LIST                    16
#define PragTyp_INTEGRITY_CHECK               17
#define PragTyp_JOURNAL_MODE                  18
#define PragTyp_JOURNAL_SIZE_LIMIT            19
#define PragTyp_LOCK_PROXY_FILE               20
#define PragTyp_LOCKING_MODE                  21
#define PragTyp_PAGE_COUNT                    22
#define PragTyp_MMAP_SIZE                     23
#define PragTyp_PAGE_SIZE                     24
#define PragTyp_SECURE_DELETE                 25
#define PragTyp_SHRINK_MEMORY                 26
#define PragTyp_SOFT_HEAP_LIMIT               27
#define PragTyp_SYNCHRONOUS                   28
#define PragTyp_TABLE_INFO                    29
#define PragTyp_TEMP_STORE                    30
#define PragTyp_TEMP_STORE_DIRECTORY          31
#define PragTyp_WAL_AUTOCHECKPOINT            32
#define PragTyp_WAL_CHECKPOINT                33
#define PragTyp_ACTIVATE_EXTENSIONS           34
#define PragTyp_HEXKEY                        35
#define PragTyp_KEY                           36
#define PragTyp_REKEY                         37
#define PragTyp_LOCK_STATUS                   38
#define PragTyp_PARSER_TRACE                  39
static const struct sPragmaNames {
  const char *const zName;  /* Name of pragma */
  u8 ePragTyp;              /* PragTyp_XXX value */
  u32 iArg;                 /* Extra argument */
} aPragmaNames[] = {
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)
  { "activate_extensions",     PragTyp_ACTIVATE_EXTENSIONS,    0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
  { "application_id",          PragTyp_HEADER_VALUE,           0 },
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
  { "auto_vacuum",             PragTyp_AUTO_VACUUM,            0 },
#endif
#if !defined(SQLITE_OMIT_AUTOMATIC_INDEX)
  { "automatic_index",         PragTyp_FLAG,                  
                               SQLITE_AutoIndex },
#endif
  { "busy_timeout",            PragTyp_BUSY_TIMEOUT,           0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "cache_size",              PragTyp_CACHE_SIZE,             0 },
#endif
  { "cache_spill",             PragTyp_FLAG,                  
                               SQLITE_CacheSpill },
  { "case_sensitive_like",     PragTyp_CASE_SENSITIVE_LIKE,    0 },
  { "checkpoint_fullfsync",    PragTyp_FLAG,                  
                               SQLITE_CkptFullFSync },
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
  { "collation_list",          PragTyp_COLLATION_LIST,         0 },
#endif
#if !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)
  { "compile_options",         PragTyp_COMPILE_OPTIONS,        0 },
#endif
  { "count_changes",           PragTyp_FLAG,                  
                               SQLITE_CountRows },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN
  { "data_store_directory",    PragTyp_DATA_STORE_DIRECTORY,   0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
  { "database_list",           PragTyp_DATABASE_LIST,          0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
  { "default_cache_size",      PragTyp_DEFAULT_CACHE_SIZE,     0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
  { "defer_foreign_keys",      PragTyp_FLAG,                  
                               SQLITE_DeferFKs },
#endif
  { "empty_result_callbacks",  PragTyp_FLAG,                  
                               SQLITE_NullCallback },
#if !defined(SQLITE_OMIT_UTF16)
  { "encoding",                PragTyp_ENCODING,               0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
  { "foreign_key_check",       PragTyp_FOREIGN_KEY_CHECK,      0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
  { "foreign_key_list",        PragTyp_FOREIGN_KEY_LIST,       0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
  { "foreign_keys",            PragTyp_FLAG,                  
                               SQLITE_ForeignKeys },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
  { "freelist_count",          PragTyp_HEADER_VALUE,           0 },
#endif
  { "full_column_names",       PragTyp_FLAG,                  
                               SQLITE_FullColNames },
  { "fullfsync",               PragTyp_FLAG,                  
                               SQLITE_FullFSync },
#if defined(SQLITE_HAS_CODEC)
  { "hexkey",                  PragTyp_HEXKEY,                 0 },
#endif
#if !defined(SQLITE_OMIT_CHECK)
  { "ignore_check_constraints", PragTyp_FLAG,                  
                               SQLITE_IgnoreChecks },
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
  { "incremental_vacuum",      PragTyp_INCREMENTAL_VACUUM,     0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
  { "index_info",              PragTyp_INDEX_INFO,             0 },
  { "index_list",              PragTyp_INDEX_LIST,             0 },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
  { "integrity_check",         PragTyp_INTEGRITY_CHECK,        0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "journal_mode",            PragTyp_JOURNAL_MODE,           0 },
  { "journal_size_limit",      PragTyp_JOURNAL_SIZE_LIMIT,     0 },
#endif
#if defined(SQLITE_HAS_CODEC)
  { "key",                     PragTyp_KEY,                    0 },
#endif
  { "legacy_file_format",      PragTyp_FLAG,                  
                               SQLITE_LegacyFileFmt },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE
  { "lock_proxy_file",         PragTyp_LOCK_PROXY_FILE,        0 },
#endif
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
  { "lock_status",             PragTyp_LOCK_STATUS,            0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "locking_mode",            PragTyp_LOCKING_MODE,           0 },
  { "max_page_count",          PragTyp_PAGE_COUNT,             0 },
  { "mmap_size",               PragTyp_MMAP_SIZE,              0 },
  { "page_count",              PragTyp_PAGE_COUNT,             0 },
  { "page_size",               PragTyp_PAGE_SIZE,              0 },
#endif
#if defined(SQLITE_DEBUG)
  { "parser_trace",            PragTyp_PARSER_TRACE,           0 },
#endif
  { "query_only",              PragTyp_FLAG,                  
                               SQLITE_QueryOnly },
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
  { "quick_check",             PragTyp_INTEGRITY_CHECK,        0 },
#endif
  { "read_uncommitted",        PragTyp_FLAG,                  
                               SQLITE_ReadUncommitted },
  { "recursive_triggers",      PragTyp_FLAG,                  
                               SQLITE_RecTriggers },
#if defined(SQLITE_HAS_CODEC)
  { "rekey",                   PragTyp_REKEY,                  0 },
#endif
  { "reverse_unordered_selects", PragTyp_FLAG,                  
                               SQLITE_ReverseOrder },
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
  { "schema_version",          PragTyp_HEADER_VALUE,           0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "secure_delete",           PragTyp_SECURE_DELETE,          0 },
#endif
  { "short_column_names",      PragTyp_FLAG,                  
                               SQLITE_ShortColNames },
  { "shrink_memory",           PragTyp_SHRINK_MEMORY,          0 },
  { "soft_heap_limit",         PragTyp_SOFT_HEAP_LIMIT,        0 },
#if defined(SQLITE_DEBUG)
  { "sql_trace",               PragTyp_FLAG,                  
                               SQLITE_SqlTrace },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "synchronous",             PragTyp_SYNCHRONOUS,            0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
  { "table_info",              PragTyp_TABLE_INFO,             0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  { "temp_store",              PragTyp_TEMP_STORE,             0 },
  { "temp_store_directory",    PragTyp_TEMP_STORE_DIRECTORY,   0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
  { "user_version",            PragTyp_HEADER_VALUE,           0 },
#endif
#if defined(SQLITE_DEBUG)
  { "vdbe_addoptrace",         PragTyp_FLAG,                  
                               SQLITE_VdbeAddopTrace },
  { "vdbe_debug",              PragTyp_FLAG,                  
                               SQLITE_SqlTrace|SQLITE_VdbeListing|SQLITE_VdbeTrace },
  { "vdbe_listing",            PragTyp_FLAG,                  
                               SQLITE_VdbeListing },
  { "vdbe_trace",              PragTyp_FLAG,                  
                               SQLITE_VdbeTrace },
#endif
#if !defined(SQLITE_OMIT_WAL)
  { "wal_autocheckpoint",      PragTyp_WAL_AUTOCHECKPOINT,     0 },
  { "wal_checkpoint",          PragTyp_WAL_CHECKPOINT,         0 },
#endif
  { "writable_schema",         PragTyp_FLAG,                  
                               SQLITE_WriteSchema|SQLITE_RecoveryMode },
};
/* Number of pragmas: 55 on by default, 66 total. */
/* End of the automatically generated pragma table.
***************************************************************************/

/*
** Interpret the given string as a safety level.  Return 0 for OFF,
** 1 for ON or NORMAL and 2 for FULL.  Return 1 for an empty or 
** unrecognized string argument.  The FULL option is disallowed
** if the omitFull parameter it 1.
**
** Note that the values returned are one less that the values that
................................................................................
  }
}
#else
# define setAllPagerFlags(X)  /* no-op */
#endif





























































































/*
** Return a human-readable name for a constraint resolution action.
*/
#ifndef SQLITE_OMIT_FOREIGN_KEY
static const char *actionName(u8 action){
  const char *zName;
  switch( action ){
................................................................................
  Token *pValue,      /* Token for <value>, or NULL */
  int minusFlag       /* True if a '-' sign preceded <value> */
){
  char *zLeft = 0;       /* Nul-terminated UTF-8 string <id> */
  char *zRight = 0;      /* Nul-terminated UTF-8 string <value>, or NULL */
  const char *zDb = 0;   /* The database name */
  Token *pId;            /* Pointer to <id> token */

  char *aFcntl[4];       /* Argument to SQLITE_FCNTL_PRAGMA */
  int iDb;               /* Database index for <database> */
  int lwr, upr, mid;           /* Binary search bounds */
  int rc;                      /* return value form SQLITE_FCNTL_PRAGMA */
  sqlite3 *db = pParse->db;    /* The database connection */
  Db *pDb;                     /* The specific database being pragmaed */
  Vdbe *v = sqlite3GetVdbe(pParse);  /* Prepared statement */

  if( v==0 ) return;
  sqlite3VdbeRunOnlyOnce(v);
................................................................................
      int mem = ++pParse->nMem;
      sqlite3VdbeAddOp4(v, OP_String8, 0, mem, 0, aFcntl[0], 0);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "result", SQLITE_STATIC);
      sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
      sqlite3_free(aFcntl[0]);
    }
    goto pragma_out;
  }
  if( rc!=SQLITE_NOTFOUND ){
    if( aFcntl[0] ){
      sqlite3ErrorMsg(pParse, "%s", aFcntl[0]);
      sqlite3_free(aFcntl[0]);
    }
    pParse->nErr++;
    pParse->rc = rc;
    goto pragma_out;
  }

  /* Locate the pragma in the lookup table */
  lwr = 0;
  upr = ArraySize(aPragmaNames)-1;
  while( lwr<=upr ){
    mid = (lwr+upr)/2;
    rc = sqlite3_stricmp(zLeft, aPragmaNames[mid].zName);
    if( rc==0 ) break;
    if( rc<0 ){
      upr = mid - 1;
    }else{
      lwr = mid + 1;
    }
  }
  if( lwr>upr ) goto pragma_out;

  /* Jump to the appropriate pragma handler */
  switch( aPragmaNames[mid].ePragTyp ){
  
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
  /*
  **  PRAGMA [database.]default_cache_size
  **  PRAGMA [database.]default_cache_size=N
  **
  ** The first form reports the current persistent setting for the
  ** page cache size.  The value returned is the maximum number of
................................................................................
  **
  ** Older versions of SQLite would set the default cache size to a
  ** negative number to indicate synchronous=OFF.  These days, synchronous
  ** is always on by default regardless of the sign of the default cache
  ** size.  But continue to take the absolute value of the default cache
  ** size of historical compatibility.
  */
  case PragTyp_DEFAULT_CACHE_SIZE: {
    static const VdbeOpList getCacheSize[] = {
      { OP_Transaction, 0, 0,        0},                         /* 0 */
      { OP_ReadCookie,  0, 1,        BTREE_DEFAULT_CACHE_SIZE},  /* 1 */
      { OP_IfPos,       1, 8,        0},
      { OP_Integer,     0, 2,        0},
      { OP_Subtract,    1, 2,        1},
      { OP_IfPos,       1, 8,        0},
................................................................................
      sqlite3BeginWriteOperation(pParse, 0, iDb);
      sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
      sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1);
      assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
    break;
  }
#endif /* !SQLITE_OMIT_PAGER_PRAGMAS && !SQLITE_OMIT_DEPRECATED */

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
  /*
  **  PRAGMA [database.]page_size
  **  PRAGMA [database.]page_size=N
  **
  ** The first form reports the current setting for the
  ** database page size in bytes.  The second form sets the
  ** database page size value.  The value can only be set if
  ** the database has not yet been created.
  */
  case PragTyp_PAGE_SIZE: {
    Btree *pBt = pDb->pBt;
    assert( pBt!=0 );
    if( !zRight ){
      int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
      returnSingleInt(pParse, "page_size", size);
    }else{
      /* Malloc may fail when setting the page-size, as there is an internal
................................................................................
      ** buffer that the pager module resizes using sqlite3_realloc().
      */
      db->nextPagesize = sqlite3Atoi(zRight);
      if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize,-1,0) ){
        db->mallocFailed = 1;
      }
    }
    break;
  }

  /*
  **  PRAGMA [database.]secure_delete
  **  PRAGMA [database.]secure_delete=ON/OFF
  **
  ** The first form reports the current setting for the
  ** secure_delete flag.  The second form changes the secure_delete
  ** flag setting and reports thenew value.
  */
  case PragTyp_SECURE_DELETE: {
    Btree *pBt = pDb->pBt;
    int b = -1;
    assert( pBt!=0 );
    if( zRight ){
      b = sqlite3GetBoolean(zRight, 0);
    }
    if( pId2->n==0 && b>=0 ){
................................................................................
      int ii;
      for(ii=0; ii<db->nDb; ii++){
        sqlite3BtreeSecureDelete(db->aDb[ii].pBt, b);
      }
    }
    b = sqlite3BtreeSecureDelete(pBt, b);
    returnSingleInt(pParse, "secure_delete", b);
    break;
  }

  /*
  **  PRAGMA [database.]max_page_count
  **  PRAGMA [database.]max_page_count=N
  **
  ** The first form reports the current setting for the
  ** maximum number of pages in the database file.  The 
................................................................................
  ** change.  The only purpose is to provide an easy way to test
  ** the sqlite3AbsInt32() function.
  **
  **  PRAGMA [database.]page_count
  **
  ** Return the number of pages in the specified database.
  */
  case PragTyp_PAGE_COUNT: {


    int iReg;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3CodeVerifySchema(pParse, iDb);
    iReg = ++pParse->nMem;
    if( sqlite3Tolower(zLeft[0])=='p' ){
      sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
    }else{
      sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, 
                        sqlite3AbsInt32(sqlite3Atoi(zRight)));
    }
    sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
    break;
  }

  /*
  **  PRAGMA [database.]locking_mode
  **  PRAGMA [database.]locking_mode = (normal|exclusive)
  */
  case PragTyp_LOCKING_MODE: {
    const char *zRet = "normal";
    int eMode = getLockingMode(zRight);

    if( pId2->n==0 && eMode==PAGER_LOCKINGMODE_QUERY ){
      /* Simple "PRAGMA locking_mode;" statement. This is a query for
      ** the current default locking mode (which may be different to
      ** the locking-mode of the main database).
................................................................................
        }
        db->dfltLockMode = (u8)eMode;
      }
      pPager = sqlite3BtreePager(pDb->pBt);
      eMode = sqlite3PagerLockingMode(pPager, eMode);
    }

    assert( eMode==PAGER_LOCKINGMODE_NORMAL
            || eMode==PAGER_LOCKINGMODE_EXCLUSIVE );
    if( eMode==PAGER_LOCKINGMODE_EXCLUSIVE ){
      zRet = "exclusive";
    }
    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "locking_mode", SQLITE_STATIC);
    sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zRet, 0);
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
    break;
  }

  /*
  **  PRAGMA [database.]journal_mode
  **  PRAGMA [database.]journal_mode =
  **                      (delete|persist|off|truncate|memory|wal|off)
  */
  case PragTyp_JOURNAL_MODE: {
    int eMode;        /* One of the PAGER_JOURNALMODE_XXX symbols */
    int ii;           /* Loop counter */

    /* Force the schema to be loaded on all databases.  This causes all
    ** database files to be opened and the journal_modes set.  This is
    ** necessary because subsequent processing must know if the databases
    ** are in WAL mode. */
................................................................................
    for(ii=db->nDb-1; ii>=0; ii--){
      if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){
        sqlite3VdbeUsesBtree(v, ii);
        sqlite3VdbeAddOp3(v, OP_JournalMode, ii, 1, eMode);
      }
    }
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
    break;
  }

  /*
  **  PRAGMA [database.]journal_size_limit
  **  PRAGMA [database.]journal_size_limit=N
  **
  ** Get or set the size limit on rollback journal files.
  */
  case PragTyp_JOURNAL_SIZE_LIMIT: {
    Pager *pPager = sqlite3BtreePager(pDb->pBt);
    i64 iLimit = -2;
    if( zRight ){
      sqlite3Atoi64(zRight, &iLimit, sqlite3Strlen30(zRight), SQLITE_UTF8);
      if( iLimit<-1 ) iLimit = -1;
    }
    iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit);
    returnSingleInt(pParse, "journal_size_limit", iLimit);
    break;
  }

#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

  /*
  **  PRAGMA [database.]auto_vacuum
  **  PRAGMA [database.]auto_vacuum=N
  **
  ** Get or set the value of the database 'auto-vacuum' parameter.
  ** The value is one of:  0 NONE 1 FULL 2 INCREMENTAL
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  case PragTyp_AUTO_VACUUM: {
    Btree *pBt = pDb->pBt;
    assert( pBt!=0 );
    if( sqlite3ReadSchema(pParse) ){
      goto pragma_out;
    }
    if( !zRight ){
      int auto_vacuum;
................................................................................
          sqlite3VdbeChangeP2(v, iAddr+2, iAddr+4);
          sqlite3VdbeChangeP1(v, iAddr+4, eAuto-1);
          sqlite3VdbeChangeP1(v, iAddr+5, iDb);
          sqlite3VdbeUsesBtree(v, iDb);
        }
      }
    }
    break;
  }
#endif

  /*
  **  PRAGMA [database.]incremental_vacuum(N)
  **
  ** Do N steps of incremental vacuuming on a database.
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  case PragTyp_INCREMENTAL_VACUUM: {
    int iLimit, addr;
    if( sqlite3ReadSchema(pParse) ){
      goto pragma_out;
    }
    if( zRight==0 || !sqlite3GetInt32(zRight, &iLimit) || iLimit<=0 ){
      iLimit = 0x7fffffff;
    }
................................................................................
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    sqlite3VdbeAddOp2(v, OP_Integer, iLimit, 1);
    addr = sqlite3VdbeAddOp1(v, OP_IncrVacuum, iDb);
    sqlite3VdbeAddOp1(v, OP_ResultRow, 1);
    sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1);
    sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr);
    sqlite3VdbeJumpHere(v, addr);
    break;
  }
#endif

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
  /*
  **  PRAGMA [database.]cache_size
  **  PRAGMA [database.]cache_size=N
  **
................................................................................
  ** The first form reports the current local setting for the
  ** page cache size. The second form sets the local
  ** page cache size value.  If N is positive then that is the
  ** number of pages in the cache.  If N is negative, then the
  ** number of pages is adjusted so that the cache uses -N kibibytes
  ** of memory.
  */
  case PragTyp_CACHE_SIZE: {
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
    if( !zRight ){
      returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
    }else{
      int size = sqlite3Atoi(zRight);
      pDb->pSchema->cache_size = size;
      sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
    }
    break;
  }

  /*
  **  PRAGMA [database.]mmap_size(N)
  **
  ** Used to set mapping size limit. The mapping size limit is
  ** used to limit the aggregate size of all memory mapped regions of the
  ** database file. If this parameter is set to zero, then memory mapping
................................................................................
  ** limit determined by sqlite3_config(SQLITE_CONFIG_MMAP_SIZE) is set.
  ** The parameter N is measured in bytes.
  **
  ** This value is advisory.  The underlying VFS is free to memory map
  ** as little or as much as it wants.  Except, if N is set to 0 then the
  ** upper layers will never invoke the xFetch interfaces to the VFS.
  */
  case PragTyp_MMAP_SIZE: {
    sqlite3_int64 sz;
#if SQLITE_MAX_MMAP_SIZE>0
    assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
    if( zRight ){
      int ii;
      sqlite3Atoi64(zRight, &sz, sqlite3Strlen30(zRight), SQLITE_UTF8);
      if( sz<0 ) sz = sqlite3GlobalConfig.szMmap;
................................................................................
#endif
    if( rc==SQLITE_OK ){
      returnSingleInt(pParse, "mmap_size", sz);
    }else if( rc!=SQLITE_NOTFOUND ){
      pParse->nErr++;
      pParse->rc = rc;
    }
    break;
  }

  /*
  **   PRAGMA temp_store
  **   PRAGMA temp_store = "default"|"memory"|"file"
  **
  ** Return or set the local value of the temp_store flag.  Changing
  ** the local value does not make changes to the disk file and the default
  ** value will be restored the next time the database is opened.
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  case PragTyp_TEMP_STORE: {
    if( !zRight ){
      returnSingleInt(pParse, "temp_store", db->temp_store);
    }else{
      changeTempStorage(pParse, zRight);
    }
    break;
  }

  /*
  **   PRAGMA temp_store_directory
  **   PRAGMA temp_store_directory = ""|"directory_name"
  **
  ** Return or set the local value of the temp_store_directory flag.  Changing
  ** the value sets a specific directory to be used for temporary files.
  ** Setting to a null string reverts to the default temporary directory search.
  ** If temporary directory is changed, then invalidateTempStorage.
  **
  */
  case PragTyp_TEMP_STORE_DIRECTORY: {
    if( !zRight ){
      if( sqlite3_temp_directory ){
        sqlite3VdbeSetNumCols(v, 1);
        sqlite3VdbeSetColName(v, 0, COLNAME_NAME, 
            "temp_store_directory", SQLITE_STATIC);
        sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_temp_directory, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
................................................................................
      if( zRight[0] ){
        sqlite3_temp_directory = sqlite3_mprintf("%s", zRight);
      }else{
        sqlite3_temp_directory = 0;
      }
#endif /* SQLITE_OMIT_WSD */
    }
    break;
  }

#if SQLITE_OS_WIN
  /*
  **   PRAGMA data_store_directory
  **   PRAGMA data_store_directory = ""|"directory_name"
  **
  ** Return or set the local value of the data_store_directory flag.  Changing
................................................................................
  ** were specified with a relative pathname.  Setting to a null string reverts
  ** to the default database directory, which for database files specified with
  ** a relative path will probably be based on the current directory for the
  ** process.  Database file specified with an absolute path are not impacted
  ** by this setting, regardless of its value.
  **
  */
  case PragTyp_DATA_STORE_DIRECTORY: {
    if( !zRight ){
      if( sqlite3_data_directory ){
        sqlite3VdbeSetNumCols(v, 1);
        sqlite3VdbeSetColName(v, 0, COLNAME_NAME, 
            "data_store_directory", SQLITE_STATIC);
        sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_data_directory, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
................................................................................
      if( zRight[0] ){
        sqlite3_data_directory = sqlite3_mprintf("%s", zRight);
      }else{
        sqlite3_data_directory = 0;
      }
#endif /* SQLITE_OMIT_WSD */
    }
    break;

  }






#endif

#if SQLITE_ENABLE_LOCKING_STYLE
  /*
  **   PRAGMA [database.]lock_proxy_file
  **   PRAGMA [database.]lock_proxy_file = ":auto:"|"lock_file_path"
  **
  ** Return or set the value of the lock_proxy_file flag.  Changing
  ** the value sets a specific file to be used for database access locks.
  **
  */

  case PragTyp_LOCK_PROXY_FILE: {
    if( !zRight ){
      Pager *pPager = sqlite3BtreePager(pDb->pBt);
      char *proxy_file_path = NULL;
      sqlite3_file *pFile = sqlite3PagerFile(pPager);
      sqlite3OsFileControlHint(pFile, SQLITE_GET_LOCKPROXYFILE, 
                           &proxy_file_path);
      
................................................................................
                                     NULL);
      }
      if( res!=SQLITE_OK ){
        sqlite3ErrorMsg(pParse, "failed to set lock proxy file");
        goto pragma_out;
      }
    }
    break;
  }
#endif /* SQLITE_ENABLE_LOCKING_STYLE */      
    
  /*
  **   PRAGMA [database.]synchronous
  **   PRAGMA [database.]synchronous=OFF|ON|NORMAL|FULL
  **
  ** Return or set the local value of the synchronous flag.  Changing
  ** the local value does not make changes to the disk file and the
  ** default value will be restored the next time the database is
  ** opened.
  */
  case PragTyp_SYNCHRONOUS: {
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    if( !zRight ){
      returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
    }else{
      if( !db->autoCommit ){
        sqlite3ErrorMsg(pParse, 
            "Safety level may not be changed inside a transaction");
      }else{
        pDb->safety_level = getSafetyLevel(zRight,0,1)+1;
        setAllPagerFlags(db);
      }
    }
    break;
  }
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

#ifndef SQLITE_OMIT_FLAG_PRAGMAS

  case PragTyp_FLAG: {
    if( zRight==0 ){
      returnSingleInt(pParse, aPragmaNames[mid].zName,
                     (db->flags & aPragmaNames[mid].iArg)!=0 );
    }else{
      int mask = aPragmaNames[mid].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( sqlite3GetBoolean(zRight, 0) ){
        db->flags |= mask;
      }else{
        db->flags &= ~mask;
        if( mask==SQLITE_DeferFKs ) db->nDeferredImmCons = 0;
      }

      /* Many of the flag-pragmas modify the code generated by the SQL 
      ** compiler (eg. count_changes). So add an opcode to expire all
      ** compiled SQL statements after modifying a pragma value.
      */
      sqlite3VdbeAddOp2(v, OP_Expire, 0, 0);
      setAllPagerFlags(db);
    }
    break;
  }
#endif /* SQLITE_OMIT_FLAG_PRAGMAS */

#ifndef SQLITE_OMIT_SCHEMA_PRAGMAS
  /*
  **   PRAGMA table_info(<table>)
  **
  ** Return a single row for each column of the named table. The columns of
................................................................................
  **
  ** cid:        Column id (numbered from left to right, starting at 0)
  ** name:       Column name
  ** type:       Column declaration type.
  ** notnull:    True if 'NOT NULL' is part of column declaration
  ** dflt_value: The default value for the column, if any.
  */
  case PragTyp_TABLE_INFO: if( zRight ){
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      int i, k;
      int nHidden = 0;
      Column *pCol;
................................................................................
        }else{
          for(k=1; ALWAYS(k<=pTab->nCol) && pPk->aiColumn[k-1]!=i; k++){}
        }
        sqlite3VdbeAddOp2(v, OP_Integer, k, 6);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }

  }

  break;

  case PragTyp_INDEX_INFO: if( zRight ){
    Index *pIdx;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pIdx = sqlite3FindIndex(db, zRight, zDb);
    if( pIdx ){
      int i;
      pTab = pIdx->pTable;
................................................................................
        sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
        sqlite3VdbeAddOp2(v, OP_Integer, cnum, 2);
        assert( pTab->nCol>cnum );
        sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, pTab->aCol[cnum].zName, 0);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
      }
    }

  }

  break;

  case PragTyp_INDEX_LIST: if( zRight ){
    Index *pIdx;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pIdx = pTab->pIndex;
................................................................................
          sqlite3VdbeAddOp2(v, OP_Integer, pIdx->onError!=OE_None, 3);
          sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
          ++i;
          pIdx = pIdx->pNext;
        }
      }
    }

  }

  break;

  case PragTyp_DATABASE_LIST: {
    int i;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    sqlite3VdbeSetNumCols(v, 3);
    pParse->nMem = 3;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "file", SQLITE_STATIC);
................................................................................
      assert( db->aDb[i].zName!=0 );
      sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, db->aDb[i].zName, 0);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0,
           sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
    }

  }

  break;

  case PragTyp_COLLATION_LIST: {
    int i = 0;
    HashElem *p;
    sqlite3VdbeSetNumCols(v, 2);
    pParse->nMem = 2;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", SQLITE_STATIC);
    for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
      CollSeq *pColl = (CollSeq *)sqliteHashData(p);
      sqlite3VdbeAddOp2(v, OP_Integer, i++, 1);
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, pColl->zName, 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
    }
  }
  break;
#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */

#ifndef SQLITE_OMIT_FOREIGN_KEY
  case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
    FKey *pFK;
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      v = sqlite3GetVdbe(pParse);
      pFK = pTab->pFKey;
................................................................................
            sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 8);
          }
          ++i;
          pFK = pFK->pNextFrom;
        }
      }
    }
  }
  break;
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */

#ifndef SQLITE_OMIT_FOREIGN_KEY
#ifndef SQLITE_OMIT_TRIGGER
  case PragTyp_FOREIGN_KEY_CHECK: {
    FKey *pFK;             /* A foreign key constraint */
    Table *pTab;           /* Child table contain "REFERENCES" keyword */
    Table *pParent;        /* Parent table that child points to */
    Index *pIdx;           /* Index in the parent table */
    int i;                 /* Loop counter:  Foreign key number for pTab */
    int j;                 /* Loop counter:  Field of the foreign key */
    HashElem *k;           /* Loop counter:  Next table in schema */
................................................................................
        sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
        sqlite3VdbeResolveLabel(v, addrOk);
        sqlite3DbFree(db, aiCols);
      }
      sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1);
      sqlite3VdbeJumpHere(v, addrTop);
    }
  }
  break;
#endif /* !defined(SQLITE_OMIT_TRIGGER) */
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */

#ifndef NDEBUG
  case PragTyp_PARSER_TRACE: {
    if( zRight ){
      if( sqlite3GetBoolean(zRight, 0) ){
        sqlite3ParserTrace(stderr, "parser: ");
      }else{
        sqlite3ParserTrace(0, 0);
      }
    }
  }
  break;
#endif

  /* Reinstall the LIKE and GLOB functions.  The variant of LIKE
  ** used will be case sensitive or not depending on the RHS.
  */
  case PragTyp_CASE_SENSITIVE_LIKE: {
    if( zRight ){
      sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight, 0));
    }
  }
  break;

#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX
# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100
#endif

#ifndef SQLITE_OMIT_INTEGRITY_CHECK
  /* Pragma "quick_check" is reduced version of 
  ** integrity_check designed to detect most database corruption
  ** without most of the overhead of a full integrity-check.
  */
  case PragTyp_INTEGRITY_CHECK: {


    int i, j, addr, mxErr;

    /* Code that appears at the end of the integrity check.  If no error
    ** messages have been generated, output OK.  Otherwise output the
    ** error message
    */
    static const VdbeOpList endCode[] = {
................................................................................
#endif /* SQLITE_OMIT_BTREECOUNT */
      } 
    }
    addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
    sqlite3VdbeChangeP2(v, addr, -mxErr);
    sqlite3VdbeJumpHere(v, addr+1);
    sqlite3VdbeChangeP4(v, addr+2, "ok", P4_STATIC);
  }
  break;
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

#ifndef SQLITE_OMIT_UTF16
  /*
  **   PRAGMA encoding
  **   PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
  **
................................................................................
  ** the main database has not been initialized and/or created when ATTACH
  ** is executed, this is done before the ATTACH operation.
  **
  ** In the second form this pragma sets the text encoding to be used in
  ** new database files created using this database handle. It is only
  ** useful if invoked immediately after the main database i
  */
  case PragTyp_ENCODING: {
    static const struct EncName {
      char *zName;
      u8 enc;
    } encnames[] = {
      { "UTF8",     SQLITE_UTF8        },
      { "UTF-8",    SQLITE_UTF8        },  /* Must be element [1] */
      { "UTF-16le", SQLITE_UTF16LE     },  /* Must be element [2] */
................................................................................
          }
        }
        if( !pEnc->zName ){
          sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
        }
      }
    }
  }
  break;
#endif /* SQLITE_OMIT_UTF16 */

#ifndef SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS
  /*
  **   PRAGMA [database.]schema_version
  **   PRAGMA [database.]schema_version = <integer>
  **
................................................................................
  ** Subverting this mechanism by using "PRAGMA schema_version" to modify
  ** the schema-version is potentially dangerous and may lead to program
  ** crashes or database corruption. Use with caution!
  **
  ** The user-version is not used internally by SQLite. It may be used by
  ** applications for any purpose.
  */
  case PragTyp_HEADER_VALUE: {




    int iCookie;   /* Cookie index. 1 for schema-cookie, 6 for user-cookie. */
    sqlite3VdbeUsesBtree(v, iDb);
    switch( zLeft[0] ){
      case 'a': case 'A':
        iCookie = BTREE_APPLICATION_ID;
        break;
      case 'f': case 'F':
................................................................................
      int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie);
      sqlite3VdbeChangeP1(v, addr, iDb);
      sqlite3VdbeChangeP1(v, addr+1, iDb);
      sqlite3VdbeChangeP3(v, addr+1, iCookie);
      sqlite3VdbeSetNumCols(v, 1);
      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT);
    }
  }
  break;
#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
  /*
  **   PRAGMA compile_options
  **
  ** Return the names of all compile-time options used in this build,
  ** one option per row.
  */
  case PragTyp_COMPILE_OPTIONS: {
    int i = 0;
    const char *zOpt;
    sqlite3VdbeSetNumCols(v, 1);
    pParse->nMem = 1;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "compile_option", SQLITE_STATIC);
    while( (zOpt = sqlite3_compileoption_get(i++))!=0 ){
      sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zOpt, 0);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
    }
  }
  break;
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */

#ifndef SQLITE_OMIT_WAL
  /*
  **   PRAGMA [database.]wal_checkpoint = passive|full|restart
  **
  ** Checkpoint the database.
  */
  case PragTyp_WAL_CHECKPOINT: {
    int iBt = (pId2->z?iDb:SQLITE_MAX_ATTACHED);
    int eMode = SQLITE_CHECKPOINT_PASSIVE;
    if( zRight ){
      if( sqlite3StrICmp(zRight, "full")==0 ){
        eMode = SQLITE_CHECKPOINT_FULL;
      }else if( sqlite3StrICmp(zRight, "restart")==0 ){
        eMode = SQLITE_CHECKPOINT_RESTART;
................................................................................
    pParse->nMem = 3;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "busy", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "log", SQLITE_STATIC);
    sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "checkpointed", SQLITE_STATIC);

    sqlite3VdbeAddOp3(v, OP_Checkpoint, iBt, eMode, 1);
    sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
  }
  break;

  /*
  **   PRAGMA wal_autocheckpoint
  **   PRAGMA wal_autocheckpoint = N
  **
  ** Configure a database connection to automatically checkpoint a database
  ** after accumulating N frames in the log. Or query for the current value
  ** of N.
  */
  case PragTyp_WAL_AUTOCHECKPOINT: {
    if( zRight ){
      sqlite3_wal_autocheckpoint(db, sqlite3Atoi(zRight));
    }
    returnSingleInt(pParse, "wal_autocheckpoint", 
       db->xWalCallback==sqlite3WalDefaultHook ? 
           SQLITE_PTR_TO_INT(db->pWalArg) : 0);
  }
  break;
#endif

  /*
  **  PRAGMA shrink_memory
  **
  ** This pragma attempts to free as much memory as possible from the
  ** current database connection.
  */
  case PragTyp_SHRINK_MEMORY: {
    sqlite3_db_release_memory(db);
    break;
  }

  /*
  **   PRAGMA busy_timeout
  **   PRAGMA busy_timeout = N
  **
  ** Call sqlite3_busy_timeout(db, N).  Return the current timeout value
  ** if one is set.  If no busy handler or a different busy handler is set
  ** then 0 is returned.  Setting the busy_timeout to 0 or negative
  ** disables the timeout.
  */
  /*case PragTyp_BUSY_TIMEOUT*/ default: {
    assert( aPragmaNames[mid].ePragTyp==PragTyp_BUSY_TIMEOUT );
    if( zRight ){
      sqlite3_busy_timeout(db, sqlite3Atoi(zRight));
    }
    returnSingleInt(pParse, "timeout",  db->busyTimeout);
    break;
  }

  /*
  **   PRAGMA soft_heap_limit
  **   PRAGMA soft_heap_limit = N
  **
  ** Call sqlite3_soft_heap_limit64(N).  Return the result.  If N is omitted,
  ** use -1.
  */
  case PragTyp_SOFT_HEAP_LIMIT: {
    sqlite3_int64 N;
    if( zRight && sqlite3Atoi64(zRight, &N, 1000000, SQLITE_UTF8)==SQLITE_OK ){
      sqlite3_soft_heap_limit64(N);
    }
    returnSingleInt(pParse, "soft_heap_limit",  sqlite3_soft_heap_limit64(-1));
    break;
  }

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
  /*
  ** Report the current state of file logs for all databases
  */
  case PragTyp_LOCK_STATUS: {
    static const char *const azLockName[] = {
      "unlocked", "shared", "reserved", "pending", "exclusive"
    };
    int i;
    sqlite3VdbeSetNumCols(v, 2);
    pParse->nMem = 2;
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "database", SQLITE_STATIC);
................................................................................
      }else if( sqlite3_file_control(db, i ? db->aDb[i].zName : 0, 
                                     SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){
         zState = azLockName[j];
      }
      sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, zState, P4_STATIC);
      sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
    }
    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 ){
      int i, h1, h2;
      char zKey[40];
      for(i=0; (h1 = zRight[i])!=0 && (h2 = zRight[i+1])!=0; i+=2){
        h1 += 9*(1&(h1>>6));
        h2 += 9*(1&(h2>>6));
        zKey[i/2] = (h2 & 0x0f) | ((h1 & 0xf)<<4);
      }
      if( (zLeft[3] & 0xf)==0xb ){
        sqlite3_key_v2(db, zDb, zKey, i/2);
      }else{
        sqlite3_rekey_v2(db, zDb, zKey, i/2);
      }

    }
    break;
  }
#endif
#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)

  case PragTyp_ACTIVATE_EXTENSIONS: if( zRight ){
#ifdef SQLITE_HAS_CODEC
    if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){
      sqlite3_activate_see(&zRight[4]);
    }
#endif
#ifdef SQLITE_ENABLE_CEROD
    if( sqlite3StrNICmp(zRight, "cerod-", 6)==0 ){
      sqlite3_activate_cerod(&zRight[6]);
    }
#endif

  }
  break;
#endif


  } /* End of the PRAGMA switch */

pragma_out:
  sqlite3DbFree(db, zLeft);
  sqlite3DbFree(db, zRight);
}

#endif /* SQLITE_OMIT_PRAGMA */

Changes to src/resolve.c

103
104
105
106
107
108
109

110
111
112
113
114
115
116
...
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
...
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
...
566
567
568
569
570
571
572













573
574
575
576
577
578
579
...
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
...
679
680
681
682
683
684
685













686
687
688
689
690
691
692
  db = pParse->db;
  pDup = sqlite3ExprDup(db, pOrig, 0);
  if( pDup==0 ) return;
  if( pOrig->op!=TK_COLUMN && zType[0]!='G' ){
    incrAggFunctionDepth(pDup, nSubquery);
    pDup = sqlite3PExpr(pParse, TK_AS, pDup, 0, 0);
    if( pDup==0 ) return;

    if( pEList->a[iCol].iAlias==0 ){
      pEList->a[iCol].iAlias = (u16)(++pParse->nAlias);
    }
    pDup->iTable = pEList->a[iCol].iAlias;
  }
  if( pExpr->op==TK_COLLATE ){
    pDup = sqlite3ExprAddCollateString(pParse, pDup, pExpr->u.zToken);
................................................................................
  */
  ExprSetProperty(pExpr, EP_Static);
  sqlite3ExprDelete(db, pExpr);
  memcpy(pExpr, pDup, sizeof(*pExpr));
  if( !ExprHasProperty(pExpr, EP_IntValue) && pExpr->u.zToken!=0 ){
    assert( (pExpr->flags & (EP_Reduced|EP_TokenOnly))==0 );
    pExpr->u.zToken = sqlite3DbStrDup(db, pExpr->u.zToken);
    pExpr->flags2 |= EP2_MallocedToken;
  }
  sqlite3DbFree(db, pDup);
}


/*
** Return TRUE if the name zCol occurs anywhere in the USING clause.
................................................................................
  struct SrcList_item *pMatch = 0;  /* The matching pSrcList item */
  NameContext *pTopNC = pNC;        /* First namecontext in the list */
  Schema *pSchema = 0;              /* Schema of the expression */
  int isTrigger = 0;

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

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

  /* 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 ){
    testcase( pNC->ncFlags & NC_PartIdx );
................................................................................
    sqlite3ErrorMsg(pParse,"%s prohibited in CHECK constraints", zMsg);
  }
}
#else
# define notValidCheckConstraint(P,N,M)
#endif















/*
** This routine is callback for sqlite3WalkExpr().
**
** Resolve symbolic names into TK_COLUMN operators for the current
** node in the expression tree.  Return 0 to continue the search down
** the tree or 2 to abort the tree walk.
................................................................................
  Parse *pParse;

  pNC = pWalker->u.pNC;
  assert( pNC!=0 );
  pParse = pNC->pParse;
  assert( pParse==pWalker->pParse );

  if( ExprHasAnyProperty(pExpr, EP_Resolved) ) return WRC_Prune;
  ExprSetProperty(pExpr, EP_Resolved);
#ifndef NDEBUG
  if( pNC->pSrcList && pNC->pSrcList->nAlloc>0 ){
    SrcList *pSrcList = pNC->pSrcList;
    int i;
    for(i=0; i<pNC->pSrcList->nSrc; i++){
      assert( pSrcList->a[i].iCursor>=0 && pSrcList->a[i].iCursor<pParse->nTab);
................................................................................
        if( pDef==0 ){
          no_such_func = 1;
        }else{
          wrong_num_args = 1;
        }
      }else{
        is_agg = pDef->xFunc==0;













      }
#ifndef SQLITE_OMIT_AUTHORIZATION
      if( pDef ){
        auth = sqlite3AuthCheck(pParse, SQLITE_FUNCTION, 0, pDef->zName, 0);
        if( auth!=SQLITE_OK ){
          if( auth==SQLITE_DENY ){
            sqlite3ErrorMsg(pParse, "not authorized to use function: %s",







>







 







|







 







|




|







 







>
>
>
>
>
>
>
>
>
>
>
>
>







 







|







 







>
>
>
>
>
>
>
>
>
>
>
>
>







103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
...
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
...
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
...
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
...
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
...
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
  db = pParse->db;
  pDup = sqlite3ExprDup(db, pOrig, 0);
  if( pDup==0 ) return;
  if( pOrig->op!=TK_COLUMN && zType[0]!='G' ){
    incrAggFunctionDepth(pDup, nSubquery);
    pDup = sqlite3PExpr(pParse, TK_AS, pDup, 0, 0);
    if( pDup==0 ) return;
    ExprSetProperty(pDup, EP_Skip);
    if( pEList->a[iCol].iAlias==0 ){
      pEList->a[iCol].iAlias = (u16)(++pParse->nAlias);
    }
    pDup->iTable = pEList->a[iCol].iAlias;
  }
  if( pExpr->op==TK_COLLATE ){
    pDup = sqlite3ExprAddCollateString(pParse, pDup, pExpr->u.zToken);
................................................................................
  */
  ExprSetProperty(pExpr, EP_Static);
  sqlite3ExprDelete(db, pExpr);
  memcpy(pExpr, pDup, sizeof(*pExpr));
  if( !ExprHasProperty(pExpr, EP_IntValue) && pExpr->u.zToken!=0 ){
    assert( (pExpr->flags & (EP_Reduced|EP_TokenOnly))==0 );
    pExpr->u.zToken = sqlite3DbStrDup(db, pExpr->u.zToken);
    pExpr->flags |= EP_MemToken;
  }
  sqlite3DbFree(db, pDup);
}


/*
** Return TRUE if the name zCol occurs anywhere in the USING clause.
................................................................................
  struct SrcList_item *pMatch = 0;  /* The matching pSrcList item */
  NameContext *pTopNC = pNC;        /* First namecontext in the list */
  Schema *pSchema = 0;              /* Schema of the expression */
  int isTrigger = 0;

  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 ){
    testcase( pNC->ncFlags & NC_PartIdx );
................................................................................
    sqlite3ErrorMsg(pParse,"%s prohibited in CHECK constraints", zMsg);
  }
}
#else
# define notValidCheckConstraint(P,N,M)
#endif

/*
** Expression p should encode a floating point value between 1.0 and 0.0.
** Return 1024 times this value.  Or return -1 if p is not a floating point
** value between 1.0 and 0.0.
*/
static int exprProbability(Expr *p){
  double r = -1.0;
  if( p->op!=TK_FLOAT ) return -1;
  sqlite3AtoF(p->u.zToken, &r, sqlite3Strlen30(p->u.zToken), SQLITE_UTF8);
  assert( r>=0.0 );
  if( r>1.0 ) return -1;
  return (int)(r*1000.0);
}

/*
** This routine is callback for sqlite3WalkExpr().
**
** Resolve symbolic names into TK_COLUMN operators for the current
** node in the expression tree.  Return 0 to continue the search down
** the tree or 2 to abort the tree walk.
................................................................................
  Parse *pParse;

  pNC = pWalker->u.pNC;
  assert( pNC!=0 );
  pParse = pNC->pParse;
  assert( pParse==pWalker->pParse );

  if( ExprHasProperty(pExpr, EP_Resolved) ) return WRC_Prune;
  ExprSetProperty(pExpr, EP_Resolved);
#ifndef NDEBUG
  if( pNC->pSrcList && pNC->pSrcList->nAlloc>0 ){
    SrcList *pSrcList = pNC->pSrcList;
    int i;
    for(i=0; i<pNC->pSrcList->nSrc; i++){
      assert( pSrcList->a[i].iCursor>=0 && pSrcList->a[i].iCursor<pParse->nTab);
................................................................................
        if( pDef==0 ){
          no_such_func = 1;
        }else{
          wrong_num_args = 1;
        }
      }else{
        is_agg = pDef->xFunc==0;
        if( pDef->funcFlags & SQLITE_FUNC_UNLIKELY ){
          ExprSetProperty(pExpr, EP_Unlikely|EP_Skip);
          if( n==2 ){
            pExpr->iTable = exprProbability(pList->a[1].pExpr);
            if( pExpr->iTable<0 ){
              sqlite3ErrorMsg(pParse, "second argument to likelihood() must be a "
                                      "constant between 0.0 and 1.0");
              pNC->nErr++;
            }
          }else{
            pExpr->iTable = 62;  /* TUNING:  Default 2nd arg to unlikely() is 0.0625 */
          }             
        }
      }
#ifndef SQLITE_OMIT_AUTHORIZATION
      if( pDef ){
        auth = sqlite3AuthCheck(pParse, SQLITE_FUNCTION, 0, pDef->zName, 0);
        if( auth!=SQLITE_OK ){
          if( auth==SQLITE_DENY ){
            sqlite3ErrorMsg(pParse, "not authorized to use function: %s",

Changes to src/select.c

260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
...
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311

  pE1 = sqlite3CreateColumnExpr(db, pSrc, iLeft, iColLeft);
  pE2 = sqlite3CreateColumnExpr(db, pSrc, iRight, iColRight);

  pEq = sqlite3PExpr(pParse, TK_EQ, pE1, pE2, 0);
  if( pEq && isOuterJoin ){
    ExprSetProperty(pEq, EP_FromJoin);
    assert( !ExprHasAnyProperty(pEq, EP_TokenOnly|EP_Reduced) );
    ExprSetIrreducible(pEq);
    pEq->iRightJoinTable = (i16)pE2->iTable;
  }
  *ppWhere = sqlite3ExprAnd(db, *ppWhere, pEq);
}

/*
** Set the EP_FromJoin property on all terms of the given expression.
................................................................................
** defer the handling of t1.x=5, it will be processed immediately
** after the t1 loop and rows with t1.x!=5 will never appear in
** the output, which is incorrect.
*/
static void setJoinExpr(Expr *p, int iTable){
  while( p ){
    ExprSetProperty(p, EP_FromJoin);
    assert( !ExprHasAnyProperty(p, EP_TokenOnly|EP_Reduced) );
    ExprSetIrreducible(p);
    p->iRightJoinTable = (i16)iTable;
    setJoinExpr(p->pLeft, iTable);
    p = p->pRight;
  } 
}

/*







|
|







 







|
|







260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
...
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311

  pE1 = sqlite3CreateColumnExpr(db, pSrc, iLeft, iColLeft);
  pE2 = sqlite3CreateColumnExpr(db, pSrc, iRight, iColRight);

  pEq = sqlite3PExpr(pParse, TK_EQ, pE1, pE2, 0);
  if( pEq && isOuterJoin ){
    ExprSetProperty(pEq, EP_FromJoin);
    assert( !ExprHasProperty(pEq, EP_TokenOnly|EP_Reduced) );
    ExprSetVVAProperty(pEq, EP_NoReduce);
    pEq->iRightJoinTable = (i16)pE2->iTable;
  }
  *ppWhere = sqlite3ExprAnd(db, *ppWhere, pEq);
}

/*
** Set the EP_FromJoin property on all terms of the given expression.
................................................................................
** defer the handling of t1.x=5, it will be processed immediately
** after the t1 loop and rows with t1.x!=5 will never appear in
** the output, which is incorrect.
*/
static void setJoinExpr(Expr *p, int iTable){
  while( p ){
    ExprSetProperty(p, EP_FromJoin);
    assert( !ExprHasProperty(p, EP_TokenOnly|EP_Reduced) );
    ExprSetVVAProperty(p, EP_NoReduce);
    p->iRightJoinTable = (i16)iTable;
    setJoinExpr(p->pLeft, iTable);
    p = p->pRight;
  } 
}

/*

Changes to src/sqliteInt.h

917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
....
1028
1029
1030
1031
1032
1033
1034

1035
1036
1037
1038
1039
1040
1041
....
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755

1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
  int (*xWalCallback)(void *, sqlite3 *, const char *, int);
  void *pWalArg;
#endif
  void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
  void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
  void *pCollNeededArg;
  sqlite3_value *pErr;          /* Most recent error message */
  char *zErrMsg;                /* Most recent error message (UTF-8 encoded) */
  char *zErrMsg16;              /* Most recent error message (UTF-16 encoded) */
  union {
    volatile int isInterrupted; /* True if sqlite3_interrupt has been called */
    double notUsed1;            /* Spacer */
  } u1;
  Lookaside lookaside;          /* Lookaside malloc configuration */
#ifndef SQLITE_OMIT_AUTHORIZATION
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
................................................................................
#define SQLITE_DistinctOpt    0x0020   /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan   0x0040   /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x0080   /* ORDER BY of joins via index */
#define SQLITE_SubqCoroutine  0x0100   /* Evaluate subqueries as coroutines */
#define SQLITE_Transitive     0x0200   /* Transitive constraints */
#define SQLITE_OmitNoopJoin   0x0400   /* Omit unused tables in joins */
#define SQLITE_Stat3          0x0800   /* Use the SQLITE_STAT3 table */

#define SQLITE_AllOpts        0xffff   /* All optimizations */

/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
#define OptimizationDisabled(db, mask)  (((db)->dbOptFlags&(mask))!=0)
................................................................................
** are contained within the same memory allocation.  Note, however, that
** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately
** allocated, regardless of whether or not EP_Reduced is set.
*/
struct Expr {
  u8 op;                 /* Operation performed by this node */
  char affinity;         /* The affinity of the column or 0 if not a column */
  u16 flags;             /* Various flags.  EP_* See below */
  union {
    char *zToken;          /* Token value. Zero terminated and dequoted */
    int iValue;            /* Non-negative integer value if EP_IntValue */
  } u;

  /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Expr *pLeft;           /* Left subnode */
  Expr *pRight;          /* Right subnode */
  union {
    ExprList *pList;     /* Function arguments or in "<expr> IN (<expr-list)" */
    Select *pSelect;     /* Used for sub-selects and "<expr> IN (<select>)" */
  } x;

  /* If the EP_Reduced flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction.
  *********************************************************************/

#if SQLITE_MAX_EXPR_DEPTH>0
  int nHeight;           /* Height of the tree headed by this node */
#endif
  int iTable;            /* TK_COLUMN: cursor number of table holding column
                         ** TK_REGISTER: register number
                         ** TK_TRIGGER: 1 -> new, 0 -> old */

  ynVar iColumn;         /* TK_COLUMN: column index.  -1 for rowid.
                         ** TK_VARIABLE: variable number (always >= 1). */
  i16 iAgg;              /* Which entry in pAggInfo->aCol[] or ->aFunc[] */
  i16 iRightJoinTable;   /* If EP_FromJoin, the right table of the join */
  u8 flags2;             /* Second set of flags.  EP2_... */
  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. */
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin   0x0001  /* Originated in ON or USING clause of a join */
#define EP_Agg        0x0002  /* Contains one or more aggregate functions */
#define EP_Resolved   0x0004  /* IDs have been resolved to COLUMNs */
#define EP_Error      0x0008  /* Expression contains one or more errors */
#define EP_Distinct   0x0010  /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect  0x0020  /* pSelect is correlated, not constant */
#define EP_DblQuoted  0x0040  /* token.z was originally in "..." */
#define EP_InfixFunc  0x0080  /* True for an infix function: LIKE, GLOB, etc */
#define EP_Collate    0x0100  /* Tree contains a TK_COLLATE opeartor */
#define EP_FixedDest  0x0200  /* Result needed in a specific register */
#define EP_IntValue   0x0400  /* Integer value contained in u.iValue */
#define EP_xIsSelect  0x0800  /* x.pSelect is valid (otherwise x.pList is) */
#define EP_Hint       0x1000  /* Not used */
#define EP_Reduced    0x2000  /* Expr struct is EXPR_REDUCEDSIZE bytes only */
#define EP_TokenOnly  0x4000  /* Expr struct is EXPR_TOKENONLYSIZE bytes only */
#define EP_Static     0x8000  /* Held in memory not obtained from malloc() */

/*
** The following are the meanings of bits in the Expr.flags2 field.
*/
#define EP2_MallocedToken  0x0001  /* Need to sqlite3DbFree() Expr.zToken */
#define EP2_Irreducible    0x0002  /* Cannot EXPRDUP_REDUCE this Expr */

/*
** The pseudo-routine sqlite3ExprSetIrreducible sets the EP2_Irreducible
** flag on an expression structure.  This flag is used for VV&A only.  The
** routine is implemented as a macro that only works when in debugging mode,
** so as not to burden production code.
*/
#ifdef SQLITE_DEBUG
# define ExprSetIrreducible(X)  (X)->flags2 |= EP2_Irreducible
#else
# define ExprSetIrreducible(X)
#endif

/*
** These macros can be used to test, set, or clear bits in the 
** Expr.flags field.
*/
#define ExprHasProperty(E,P)     (((E)->flags&(P))==(P))
#define ExprHasAnyProperty(E,P)  (((E)->flags&(P))!=0)
#define ExprSetProperty(E,P)     (E)->flags|=(P)
#define ExprClearProperty(E,P)   (E)->flags&=~(P)

/*
** Macros to determine the number of bytes required by a normal Expr 
** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 
** and an Expr struct with the EP_TokenOnly flag set.
*/
#define EXPR_FULLSIZE           sizeof(Expr)           /* Full size */







<
<







 







>







 







|













|
|












|
>




<










|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<
<
<
<
<







917
918
919
920
921
922
923


924
925
926
927
928
929
930
....
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
....
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759

1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807





1808
1809
1810
1811
1812
1813
1814
  int (*xWalCallback)(void *, sqlite3 *, const char *, int);
  void *pWalArg;
#endif
  void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*);
  void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*);
  void *pCollNeededArg;
  sqlite3_value *pErr;          /* Most recent error message */


  union {
    volatile int isInterrupted; /* True if sqlite3_interrupt has been called */
    double notUsed1;            /* Spacer */
  } u1;
  Lookaside lookaside;          /* Lookaside malloc configuration */
#ifndef SQLITE_OMIT_AUTHORIZATION
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
................................................................................
#define SQLITE_DistinctOpt    0x0020   /* DISTINCT using indexes */
#define SQLITE_CoverIdxScan   0x0040   /* Covering index scans */
#define SQLITE_OrderByIdxJoin 0x0080   /* ORDER BY of joins via index */
#define SQLITE_SubqCoroutine  0x0100   /* Evaluate subqueries as coroutines */
#define SQLITE_Transitive     0x0200   /* Transitive constraints */
#define SQLITE_OmitNoopJoin   0x0400   /* Omit unused tables in joins */
#define SQLITE_Stat3          0x0800   /* Use the SQLITE_STAT3 table */
#define SQLITE_AdjustOutEst   0x1000   /* Adjust output estimates using WHERE */
#define SQLITE_AllOpts        0xffff   /* All optimizations */

/*
** Macros for testing whether or not optimizations are enabled or disabled.
*/
#ifndef SQLITE_OMIT_BUILTIN_TEST
#define OptimizationDisabled(db, mask)  (((db)->dbOptFlags&(mask))!=0)
................................................................................
** are contained within the same memory allocation.  Note, however, that
** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately
** allocated, regardless of whether or not EP_Reduced is set.
*/
struct Expr {
  u8 op;                 /* Operation performed by this node */
  char affinity;         /* The affinity of the column or 0 if not a column */
  u32 flags;             /* Various flags.  EP_* See below */
  union {
    char *zToken;          /* Token value. Zero terminated and dequoted */
    int iValue;            /* Non-negative integer value if EP_IntValue */
  } u;

  /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Expr *pLeft;           /* Left subnode */
  Expr *pRight;          /* Right subnode */
  union {
    ExprList *pList;     /* op = IN, EXISTS, SELECT, CASE, FUNCTION, BETWEEN */
    Select *pSelect;     /* EP_xIsSelect and op = IN, EXISTS, SELECT */
  } x;

  /* If the EP_Reduced flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction.
  *********************************************************************/

#if SQLITE_MAX_EXPR_DEPTH>0
  int nHeight;           /* Height of the tree headed by this node */
#endif
  int iTable;            /* TK_COLUMN: cursor number of table holding column
                         ** TK_REGISTER: register number
                         ** TK_TRIGGER: 1 -> new, 0 -> old
                         ** EP_Unlikely:  1000 times likelihood */
  ynVar iColumn;         /* TK_COLUMN: column index.  -1 for rowid.
                         ** TK_VARIABLE: variable number (always >= 1). */
  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. */
};

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originated in ON or USING clause of a join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
#define EP_Resolved  0x000004 /* IDs have been resolved to COLUMNs */
#define EP_Error     0x000008 /* Expression contains one or more errors */
#define EP_Distinct  0x000010 /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */
#define EP_DblQuoted 0x000040 /* token.z was originally in "..." */
#define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */
#define EP_Collate   0x000100 /* Tree contains a TK_COLLATE opeartor */
#define EP_FixedDest 0x000200 /* Result needed in a specific register */
#define EP_IntValue  0x000400 /* Integer value contained in u.iValue */
#define EP_xIsSelect 0x000800 /* x.pSelect is valid (otherwise x.pList is) */
#define EP_Skip      0x001000 /* COLLATE, AS, or UNLIKELY */
#define EP_Reduced   0x002000 /* Expr struct EXPR_REDUCEDSIZE bytes only */
#define EP_TokenOnly 0x004000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */
#define EP_Static    0x008000 /* Held in memory not obtained from malloc() */
#define EP_MemToken  0x010000 /* Need to sqlite3DbFree() Expr.zToken */
#define EP_NoReduce  0x020000 /* Cannot EXPRDUP_REDUCE this Expr */
#define EP_Unlikely  0x040000 /* unlikely() or likelihood() function */

/*
** These macros can be used to test, set, or clear bits in the 
** Expr.flags field.
*/
#define ExprHasProperty(E,P)     (((E)->flags&(P))!=0)
#define ExprHasAllProperty(E,P)  (((E)->flags&(P))==(P))
#define ExprSetProperty(E,P)     (E)->flags|=(P)
#define ExprClearProperty(E,P)   (E)->flags&=~(P)

/* The ExprSetVVAProperty() macro is used for Verification, Validation,
** and Accreditation only.  It works like ExprSetProperty() during VVA
** processes but is a no-op for delivery.
*/
#ifdef SQLITE_DEBUG
# define ExprSetVVAProperty(E,P)  (E)->flags|=(P)
#else
# define ExprSetVVAProperty(E,P)
#endif






/*
** Macros to determine the number of bytes required by a normal Expr 
** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 
** and an Expr struct with the EP_TokenOnly flag set.
*/
#define EXPR_FULLSIZE           sizeof(Expr)           /* Full size */

Changes to src/util.c

189
190
191
192
193
194
195
196

197
198
199
200
201
202
203
  switch( quote ){
    case '\'':  break;
    case '"':   break;
    case '`':   break;                /* For MySQL compatibility */
    case '[':   quote = ']';  break;  /* For MS SqlServer compatibility */
    default:    return -1;
  }
  for(i=1, j=0; ALWAYS(z[i]); i++){

    if( z[i]==quote ){
      if( z[i+1]==quote ){
        z[j++] = quote;
        i++;
      }else{
        break;
      }







|
>







189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
  switch( quote ){
    case '\'':  break;
    case '"':   break;
    case '`':   break;                /* For MySQL compatibility */
    case '[':   quote = ']';  break;  /* For MS SqlServer compatibility */
    default:    return -1;
  }
  for(i=1, j=0;; i++){
    assert( z[i] );
    if( z[i]==quote ){
      if( z[i+1]==quote ){
        z[j++] = quote;
        i++;
      }else{
        break;
      }

Changes to src/walker.c

39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
int sqlite3WalkExpr(Walker *pWalker, Expr *pExpr){
  int rc;
  if( pExpr==0 ) return WRC_Continue;
  testcase( ExprHasProperty(pExpr, EP_TokenOnly) );
  testcase( ExprHasProperty(pExpr, EP_Reduced) );
  rc = pWalker->xExprCallback(pWalker, pExpr);
  if( rc==WRC_Continue
              && !ExprHasAnyProperty(pExpr,EP_TokenOnly) ){
    if( sqlite3WalkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort;
    if( sqlite3WalkExpr(pWalker, pExpr->pRight) ) return WRC_Abort;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
    }else{
      if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
    }







|







39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
int sqlite3WalkExpr(Walker *pWalker, Expr *pExpr){
  int rc;
  if( pExpr==0 ) return WRC_Continue;
  testcase( ExprHasProperty(pExpr, EP_TokenOnly) );
  testcase( ExprHasProperty(pExpr, EP_Reduced) );
  rc = pWalker->xExprCallback(pWalker, pExpr);
  if( rc==WRC_Continue
              && !ExprHasProperty(pExpr,EP_TokenOnly) ){
    if( sqlite3WalkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort;
    if( sqlite3WalkExpr(pWalker, pExpr->pRight) ) return WRC_Abort;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
    }else{
      if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
    }

Changes to src/where.c

48
49
50
51
52
53
54
55
56
57
58
59
60

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
...
265
266
267
268
269
270
271

272
273
274
275
276
277
278
...
639
640
641
642
643
644
645



646
647
648
649
650
651
652
...
680
681
682
683
684
685
686





687
688
689
690
691
692
693
....
2541
2542
2543
2544
2545
2546
2547

2548
2549
2550
2551
2552
2553
2554
....
2603
2604
2605
2606
2607
2608
2609

2610
2611
2612
2613
2614
2615
2616
....
2617
2618
2619
2620
2621
2622
2623

2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
....
2644
2645
2646
2647
2648
2649
2650

2651
2652

2653
2654
2655

2656

2657
2658
2659
2660
2661
2662
2663
2664
....
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194

4195
4196
4197
4198
4199
4200
4201
....
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214

4215
4216
4217
4218
4219
4220
4221
....
4253
4254
4255
4256
4257
4258
4259






























4260
4261
4262
4263
4264
4265
4266
....
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
....
4624
4625
4626
4627
4628
4629
4630

4631

4632
4633
4634
4635
4636
4637
4638
....
4656
4657
4658
4659
4660
4661
4662

4663

4664
4665
4666
4667
4668
4669
4670
....
5263
5264
5265
5266
5267
5268
5269

5270

5271

5272
5273
5274
5275
5276
5277
5278
5279
....
5334
5335
5336
5337
5338
5339
5340

5341
5342
5343
5344
5345
5346
5347
....
5356
5357
5358
5359
5360
5361
5362

5363



5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434

5435

5436

5437



5438
5439
5440
5441
5442
5443
5444
....
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
typedef struct WhereOrCost WhereOrCost;
typedef struct WhereOrSet WhereOrSet;

/*
** Cost X is tracked as 10*log2(X) stored in a 16-bit integer.  The
** maximum cost for ordinary tables is 64*(2**63) which becomes 6900.
** (Virtual tables can return a larger cost, but let's assume they do not.)
** So all costs can be stored in a 16-bit unsigned integer without risk
** of overflow.
**
** Costs are estimates, so no effort is made to compute 10*log2(X) exactly.
** Instead, a close estimate is used.  Any value of X<=1 is stored as 0.
** X=2 is 10.  X=3 is 16.  X=1000 is 99. etc.

**
** The tool/wherecosttest.c source file implements a command-line program
** that will convert WhereCosts to integers, convert integers to WhereCosts
** and do addition and multiplication on WhereCost values.  The wherecosttest
** command-line program is a useful utility to have around when working with
** this module.
*/
typedef unsigned short int WhereCost;

/*
** This object contains information needed to implement a single nested
** loop in WHERE clause.
**
** Contrast this object with WhereLoop.  This object describes the
** implementation of the loop.  WhereLoop describes the algorithm.
................................................................................
  int iParent;            /* Disable pWC->a[iParent] when this term disabled */
  int leftCursor;         /* Cursor number of X in "X <op> <expr>" */
  union {
    int leftColumn;         /* Column number of X in "X <op> <expr>" */
    WhereOrInfo *pOrInfo;   /* Extra information if (eOperator & WO_OR)!=0 */
    WhereAndInfo *pAndInfo; /* Extra information if (eOperator& WO_AND)!=0 */
  } u;

  u16 eOperator;          /* A WO_xx value describing <op> */
  u8 wtFlags;             /* TERM_xxx bit flags.  See below */
  u8 nChild;              /* Number of children that must disable us */
  WhereClause *pWC;       /* The clause this term is part of */
  Bitmask prereqRight;    /* Bitmask of tables used by pExpr->pRight */
  Bitmask prereqAll;      /* Bitmask of tables referenced by pExpr */
};
................................................................................
    }
  }
  if( pWC->a!=pWC->aStatic ){
    sqlite3DbFree(db, pWC->a);
  }
}




/*
** Add a single new WhereTerm entry to the WhereClause object pWC.
** The new WhereTerm object is constructed from Expr p and with wtFlags.
** The index in pWC->a[] of the new WhereTerm is returned on success.
** 0 is returned if the new WhereTerm could not be added due to a memory
** allocation error.  The memory allocation failure will be recorded in
** the db->mallocFailed flag so that higher-level functions can detect it.
................................................................................
    memcpy(pWC->a, pOld, sizeof(pWC->a[0])*pWC->nTerm);
    if( pOld!=pWC->aStatic ){
      sqlite3DbFree(db, pOld);
    }
    pWC->nSlot = sqlite3DbMallocSize(db, pWC->a)/sizeof(pWC->a[0]);
  }
  pTerm = &pWC->a[idx = pWC->nTerm++];





  pTerm->pExpr = sqlite3ExprSkipCollate(p);
  pTerm->wtFlags = wtFlags;
  pTerm->pWC = pWC;
  pTerm->iParent = -1;
  return idx;
}

................................................................................
  WhereLoopBuilder *pBuilder,
  WhereTerm *pLower,   /* Lower bound on the range. ex: "x>123" Might be NULL */
  WhereTerm *pUpper,   /* Upper bound on the range. ex: "x<455" Might be NULL */
  WhereCost *pnOut     /* IN/OUT: Number of rows visited */
){
  int rc = SQLITE_OK;
  int nOut = (int)*pnOut;


#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  Index *p = pBuilder->pNew->u.btree.pIndex;
  int nEq = pBuilder->pNew->u.btree.nEq;

  if( p->nSample>0
   && nEq==pBuilder->nRecValid
................................................................................
      assert( (pLower->eOperator & (WO_GT|WO_GE))!=0 );
      rc = sqlite3Stat4ProbeSetValue(pParse, p, &pRec, pExpr, aff, nEq, &bOk);
      if( rc==SQLITE_OK && bOk ){
        tRowcnt iNew;
        whereKeyStats(pParse, p, pRec, 0, a);
        iNew = a[0] + ((pLower->eOperator & WO_GT) ? a[1] : 0);
        if( iNew>iLower ) iLower = iNew;

      }
    }

    /* If possible, improve on the iUpper estimate using ($P:$U). */
    if( pUpper ){
      int bOk;                    /* True if value is extracted from pExpr */
      Expr *pExpr = pUpper->pExpr->pRight;
................................................................................
      assert( (pUpper->eOperator & (WO_LT|WO_LE))!=0 );
      rc = sqlite3Stat4ProbeSetValue(pParse, p, &pRec, pExpr, aff, nEq, &bOk);
      if( rc==SQLITE_OK && bOk ){
        tRowcnt iNew;
        whereKeyStats(pParse, p, pRec, 1, a);
        iNew = a[0] + ((pUpper->eOperator & WO_LE) ? a[1] : 0);
        if( iNew<iUpper ) iUpper = iNew;

      }
    }

    pBuilder->pRec = pRec;
    if( rc==SQLITE_OK ){
      WhereCost nNew;
      if( iUpper>iLower ){
        nNew = whereCost(iUpper - iLower);
      }else{
        nNew = 10;        assert( 10==whereCost(2) );
      }
      if( nNew<nOut ){
        nOut = nNew;
................................................................................
#else
  UNUSED_PARAMETER(pParse);
  UNUSED_PARAMETER(pBuilder);
#endif
  assert( pLower || pUpper );
  /* TUNING:  Each inequality constraint reduces the search space 4-fold.
  ** A BETWEEN operator, therefore, reduces the search space 16-fold */

  if( pLower && (pLower->wtFlags & TERM_VNULL)==0 ){
    nOut -= 20;        assert( 20==whereCost(4) );

  }
  if( pUpper ){
    nOut -= 20;        assert( 20==whereCost(4) );

  }

  if( nOut<10 ) nOut = 10;
  *pnOut = (WhereCost)nOut;
  return rc;
}

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
/*
** Estimate the number of rows that will be returned based on
................................................................................
    ){
      /* This branch taken when p is equal or better than pTemplate in 
      ** all of (1) dependencies (2) setup-cost, (3) run-cost, and
      ** (4) number of output rows. */
      assert( p->rSetup==pTemplate->rSetup );
      if( p->prereq==pTemplate->prereq
       && p->nLTerm<pTemplate->nLTerm
       && (p->wsFlags & WHERE_INDEXED)!=0
       && (pTemplate->wsFlags & WHERE_INDEXED)!=0
       && p->u.btree.pIndex==pTemplate->u.btree.pIndex

      ){
        /* Overwrite an existing WhereLoop with an similar one that uses
        ** more terms of the index */
        pNext = p->pNextLoop;
        break;
      }else{
        /* pTemplate is not helpful.
................................................................................
        ** Return without changing or adding anything */
        goto whereLoopInsert_noop;
      }
    }
    if( (p->prereq & pTemplate->prereq)==pTemplate->prereq
     && p->rRun>=pTemplate->rRun
     && p->nOut>=pTemplate->nOut
     && ALWAYS(p->rSetup>=pTemplate->rSetup) /* See SETUP-INVARIANT above */
    ){
      /* Overwrite an existing WhereLoop with a better one: one that is
      ** better at one of (1) dependencies, (2) setup-cost, (3) run-cost
      ** or (4) number of output rows, and is no worse in any of those
      ** categories. */

      pNext = p->pNextLoop;
      break;
    }
  }

  /* If we reach this point it means that either p[] should be overwritten
  ** with pTemplate[] if p[] exists, or if p==NULL then allocate a new
................................................................................
  if( sqlite3WhereTrace & 0x8 ){
    sqlite3DebugPrintf("ins-noop: ");
    whereLoopPrint(pTemplate, pWInfo->pTabList);
  }
#endif
  return SQLITE_OK;  
}































/*
** We have so far matched pBuilder->pNew->u.btree.nEq terms of the index pIndex.
** Try to match one more.
**
** If pProbe->tnum==0, that means pIndex is a fake index used for the
** INTEGER PRIMARY KEY.
................................................................................
    if( (pNew->wsFlags & (WHERE_IDX_ONLY|WHERE_IPK))==0 ){
      /* Each row involves a step of the index, then a binary search of
      ** the main table */
      pNew->rRun =  whereCostAdd(pNew->rRun, rLogSize>27 ? rLogSize-17 : 10);
    }
    /* Step cost for each output row */
    pNew->rRun = whereCostAdd(pNew->rRun, pNew->nOut);
    /* TBD: Adjust nOut for additional constraints */
    rc = whereLoopInsert(pBuilder, pNew);
    if( (pNew->wsFlags & WHERE_TOP_LIMIT)==0
     && pNew->u.btree.nEq<(pProbe->nColumn + (pProbe->zName!=0))
    ){
      whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, nInMul+nIn);
    }
    pNew->nOut = saved_nOut;
................................................................................
      pNew->iSortIdx = b ? iSortIdx : 0;
      /* TUNING: Cost of full table scan is 3*(N + log2(N)).
      **  +  The extra 3 factor is to encourage the use of indexed lookups
      **     over full scans.  A smaller constant 2 is used for covering
      **     index scans so that a covering index scan will be favored over
      **     a table scan. */
      pNew->rRun = whereCostAdd(rSize,rLogSize) + 16;

      rc = whereLoopInsert(pBuilder, pNew);

      if( rc ) break;
    }else{
      Bitmask m = pSrc->colUsed & ~columnsInIndex(pProbe);
      pNew->wsFlags = (m==0) ? (WHERE_IDX_ONLY|WHERE_INDEXED) : WHERE_INDEXED;

      /* Full scan via index */
      if( b
................................................................................
          pNew->rRun = 10 + whereCostAdd(rSize,rLogSize) - b;
        }else{
          assert( b!=0 ); 
          /* TUNING: Cost of scanning a non-covering index is (N+1)*log2(N)
          ** which we will simplify to just N*log2(N) */
          pNew->rRun = rSize + rLogSize;
        }

        rc = whereLoopInsert(pBuilder, pNew);

        if( rc ) break;
      }
    }

    rc = whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, 0);
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
    sqlite3Stat4ProbeFree(pBuilder->pRec);
................................................................................
static int wherePathSolver(WhereInfo *pWInfo, WhereCost nRowEst){
  int mxChoice;             /* Maximum number of simultaneous paths tracked */
  int nLoop;                /* Number of terms in the join */
  Parse *pParse;            /* Parsing context */
  sqlite3 *db;              /* The database connection */
  int iLoop;                /* Loop counter over the terms of the join */
  int ii, jj;               /* Loop counters */

  WhereCost rCost;             /* Cost of a path */

  WhereCost mxCost = 0;        /* Maximum cost of a set of paths */

  WhereCost rSortCost;         /* Cost to do a sort */
  int nTo, nFrom;           /* Number of valid entries in aTo[] and aFrom[] */
  WherePath *aFrom;         /* All nFrom paths at the previous level */
  WherePath *aTo;           /* The nTo best paths at the current level */
  WherePath *pFrom;         /* An element of aFrom[] that we are working on */
  WherePath *pTo;           /* An element of aTo[] that we are working on */
  WhereLoop *pWLoop;        /* One of the WhereLoop objects */
  WhereLoop **pX;           /* Used to divy up the pSpace memory */
................................................................................
        u8 isOrdered = pFrom->isOrdered;
        if( (pWLoop->prereq & ~pFrom->maskLoop)!=0 ) continue;
        if( (pWLoop->maskSelf & pFrom->maskLoop)!=0 ) continue;
        /* At this point, pWLoop is a candidate to be the next loop. 
        ** Compute its cost */
        rCost = whereCostAdd(pWLoop->rSetup,pWLoop->rRun + pFrom->nRow);
        rCost = whereCostAdd(rCost, pFrom->rCost);

        maskNew = pFrom->maskLoop | pWLoop->maskSelf;
        if( !isOrderedValid ){
          switch( wherePathSatisfiesOrderBy(pWInfo,
                       pWInfo->pOrderBy, pFrom, pWInfo->wctrlFlags,
                       iLoop, pWLoop, &revMask) ){
            case 1:  /* Yes.  pFrom+pWLoop does satisfy the ORDER BY clause */
              isOrdered = 1;
................................................................................
              break;
          }
        }else{
          revMask = pFrom->revLoop;
        }
        /* Check to see if pWLoop should be added to the mxChoice best so far */
        for(jj=0, pTo=aTo; jj<nTo; jj++, pTo++){

          if( pTo->maskLoop==maskNew && pTo->isOrderedValid==isOrderedValid ){



            testcase( jj==nTo-1 );
            break;
          }
        }
        if( jj>=nTo ){
          if( nTo>=mxChoice && rCost>=mxCost ){
#ifdef WHERETRACE_ENABLED
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf("Skip   %s cost=%3d order=%c\n",
                  wherePathName(pFrom, iLoop, pWLoop), rCost,
                  isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
            }
#endif
            continue;
          }
          /* Add a new Path to the aTo[] set */
          if( nTo<mxChoice ){
            /* Increase the size of the aTo set by one */
            jj = nTo++;
          }else{
            /* New path replaces the prior worst to keep count below mxChoice */
            for(jj=nTo-1; aTo[jj].rCost<mxCost; jj--){ assert(jj>0); }
          }
          pTo = &aTo[jj];
#ifdef WHERETRACE_ENABLED
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf("New    %s cost=%-3d order=%c\n",
                wherePathName(pFrom, iLoop, pWLoop), rCost,
                isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
          }
#endif
        }else{
          if( pTo->rCost<=rCost ){
#ifdef WHERETRACE_ENABLED
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf(
                  "Skip   %s cost=%-3d order=%c",
                  wherePathName(pFrom, iLoop, pWLoop), rCost,
                  isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
              sqlite3DebugPrintf("   vs %s cost=%-3d order=%c\n",
                  wherePathName(pTo, iLoop+1, 0), pTo->rCost,
                  pTo->isOrderedValid ? (pTo->isOrdered ? 'Y' : 'N') : '?');
            }
#endif
            testcase( pTo->rCost==rCost );
            continue;
          }
          testcase( pTo->rCost==rCost+1 );
          /* A new and better score for a previously created equivalent path */
#ifdef WHERETRACE_ENABLED
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf(
                "Update %s cost=%-3d order=%c",
                wherePathName(pFrom, iLoop, pWLoop), rCost,
                isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
            sqlite3DebugPrintf("  was %s cost=%-3d order=%c\n",
                wherePathName(pTo, iLoop+1, 0), pTo->rCost,
                pTo->isOrderedValid ? (pTo->isOrdered ? 'Y' : 'N') : '?');
          }
#endif
        }
        /* pWLoop is a winner.  Add it to the set of best so far */
        pTo->maskLoop = pFrom->maskLoop | pWLoop->maskSelf;
        pTo->revLoop = revMask;
        pTo->nRow = pFrom->nRow + pWLoop->nOut;
        pTo->rCost = rCost;
        pTo->isOrderedValid = isOrderedValid;
        pTo->isOrdered = isOrdered;
        memcpy(pTo->aLoop, pFrom->aLoop, sizeof(WhereLoop*)*iLoop);
        pTo->aLoop[iLoop] = pWLoop;
        if( nTo>=mxChoice ){

          mxCost = aTo[0].rCost;

          for(jj=1, pTo=&aTo[1]; jj<mxChoice; jj++, pTo++){

            if( pTo->rCost>mxCost ) mxCost = pTo->rCost;



          }
        }
      }
    }

#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace>=2 ){
................................................................................
    sqlite3ErrorMsg(pParse, "no query solution");
    sqlite3DbFree(db, pSpace);
    return SQLITE_ERROR;
  }
  
  /* Find the lowest cost path.  pFrom will be left pointing to that path */
  pFrom = aFrom;
  assert( nFrom==1 );
#if 0 /* The following is needed if nFrom is ever more than 1 */
  for(ii=1; ii<nFrom; ii++){
    if( pFrom->rCost>aFrom[ii].rCost ) pFrom = &aFrom[ii];
  }
#endif
  assert( pWInfo->nLevel==nLoop );
  /* Load the lowest cost path into pWInfo */
  for(iLoop=0; iLoop<nLoop; iLoop++){
    WhereLevel *pLevel = pWInfo->a + iLoop;
    pLevel->pWLoop = pWLoop = pFrom->aLoop[iLoop];
    pLevel->iFrom = pWLoop->iTab;
    pLevel->iTabCur = pWInfo->pTabList->a[pLevel->iFrom].iCursor;







|



|
|
>







|







 







>







 







>
>
>







 







>
>
>
>
>







 







>







 







>







 







>





<







 







>

|
>


|
>

>
|







 







<
|
|
>







 







<





>







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







|







 







>

>







 







>

>







 







>
|
>
|
>
|







 







>







 







>
|
>
>
>








|
|











|




|
|




|



|
|

|
|











|
|

|
|







|






>

>

>
|
>
>
>







 







<
<



<







48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
...
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
...
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
...
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
....
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
....
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
....
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641

2642
2643
2644
2645
2646
2647
2648
....
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
....
4201
4202
4203
4204
4205
4206
4207

4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
....
4218
4219
4220
4221
4222
4223
4224

4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
....
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
....
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
....
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
....
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
....
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
....
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
....
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
....
5531
5532
5533
5534
5535
5536
5537


5538
5539
5540

5541
5542
5543
5544
5545
5546
5547
typedef struct WhereOrCost WhereOrCost;
typedef struct WhereOrSet WhereOrSet;

/*
** Cost X is tracked as 10*log2(X) stored in a 16-bit integer.  The
** maximum cost for ordinary tables is 64*(2**63) which becomes 6900.
** (Virtual tables can return a larger cost, but let's assume they do not.)
** So all costs can be stored in a 16-bit integer without risk
** of overflow.
**
** Costs are estimates, so no effort is made to compute 10*log2(X) exactly.
** Instead, a close estimate is used.  Any value of X=1 is stored as 0.
** X=2 is 10.  X=3 is 16.  X=1000 is 99. etc.  Negative values are allowed.
** A WhereCost of -10 means 0.5.  WhereCost of -20 means 0.25.  And so forth.
**
** The tool/wherecosttest.c source file implements a command-line program
** that will convert WhereCosts to integers, convert integers to WhereCosts
** and do addition and multiplication on WhereCost values.  The wherecosttest
** command-line program is a useful utility to have around when working with
** this module.
*/
typedef short int WhereCost;

/*
** This object contains information needed to implement a single nested
** loop in WHERE clause.
**
** Contrast this object with WhereLoop.  This object describes the
** implementation of the loop.  WhereLoop describes the algorithm.
................................................................................
  int iParent;            /* Disable pWC->a[iParent] when this term disabled */
  int leftCursor;         /* Cursor number of X in "X <op> <expr>" */
  union {
    int leftColumn;         /* Column number of X in "X <op> <expr>" */
    WhereOrInfo *pOrInfo;   /* Extra information if (eOperator & WO_OR)!=0 */
    WhereAndInfo *pAndInfo; /* Extra information if (eOperator& WO_AND)!=0 */
  } u;
  WhereCost truthProb;    /* Probability of truth for this expression */
  u16 eOperator;          /* A WO_xx value describing <op> */
  u8 wtFlags;             /* TERM_xxx bit flags.  See below */
  u8 nChild;              /* Number of children that must disable us */
  WhereClause *pWC;       /* The clause this term is part of */
  Bitmask prereqRight;    /* Bitmask of tables used by pExpr->pRight */
  Bitmask prereqAll;      /* Bitmask of tables referenced by pExpr */
};
................................................................................
    }
  }
  if( pWC->a!=pWC->aStatic ){
    sqlite3DbFree(db, pWC->a);
  }
}

/* Forward declaration */
static WhereCost whereCost(tRowcnt x);

/*
** Add a single new WhereTerm entry to the WhereClause object pWC.
** The new WhereTerm object is constructed from Expr p and with wtFlags.
** The index in pWC->a[] of the new WhereTerm is returned on success.
** 0 is returned if the new WhereTerm could not be added due to a memory
** allocation error.  The memory allocation failure will be recorded in
** the db->mallocFailed flag so that higher-level functions can detect it.
................................................................................
    memcpy(pWC->a, pOld, sizeof(pWC->a[0])*pWC->nTerm);
    if( pOld!=pWC->aStatic ){
      sqlite3DbFree(db, pOld);
    }
    pWC->nSlot = sqlite3DbMallocSize(db, pWC->a)/sizeof(pWC->a[0]);
  }
  pTerm = &pWC->a[idx = pWC->nTerm++];
  if( p && ExprHasProperty(p, EP_Unlikely) ){
    pTerm->truthProb = whereCost(p->iTable) - 99;
  }else{
    pTerm->truthProb = -1;
  }
  pTerm->pExpr = sqlite3ExprSkipCollate(p);
  pTerm->wtFlags = wtFlags;
  pTerm->pWC = pWC;
  pTerm->iParent = -1;
  return idx;
}

................................................................................
  WhereLoopBuilder *pBuilder,
  WhereTerm *pLower,   /* Lower bound on the range. ex: "x>123" Might be NULL */
  WhereTerm *pUpper,   /* Upper bound on the range. ex: "x<455" Might be NULL */
  WhereCost *pnOut     /* IN/OUT: Number of rows visited */
){
  int rc = SQLITE_OK;
  int nOut = (int)*pnOut;
  WhereCost nNew;

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  Index *p = pBuilder->pNew->u.btree.pIndex;
  int nEq = pBuilder->pNew->u.btree.nEq;

  if( p->nSample>0
   && nEq==pBuilder->nRecValid
................................................................................
      assert( (pLower->eOperator & (WO_GT|WO_GE))!=0 );
      rc = sqlite3Stat4ProbeSetValue(pParse, p, &pRec, pExpr, aff, nEq, &bOk);
      if( rc==SQLITE_OK && bOk ){
        tRowcnt iNew;
        whereKeyStats(pParse, p, pRec, 0, a);
        iNew = a[0] + ((pLower->eOperator & WO_GT) ? a[1] : 0);
        if( iNew>iLower ) iLower = iNew;
        nOut--;
      }
    }

    /* If possible, improve on the iUpper estimate using ($P:$U). */
    if( pUpper ){
      int bOk;                    /* True if value is extracted from pExpr */
      Expr *pExpr = pUpper->pExpr->pRight;
................................................................................
      assert( (pUpper->eOperator & (WO_LT|WO_LE))!=0 );
      rc = sqlite3Stat4ProbeSetValue(pParse, p, &pRec, pExpr, aff, nEq, &bOk);
      if( rc==SQLITE_OK && bOk ){
        tRowcnt iNew;
        whereKeyStats(pParse, p, pRec, 1, a);
        iNew = a[0] + ((pUpper->eOperator & WO_LE) ? a[1] : 0);
        if( iNew<iUpper ) iUpper = iNew;
        nOut--;
      }
    }

    pBuilder->pRec = pRec;
    if( rc==SQLITE_OK ){

      if( iUpper>iLower ){
        nNew = whereCost(iUpper - iLower);
      }else{
        nNew = 10;        assert( 10==whereCost(2) );
      }
      if( nNew<nOut ){
        nOut = nNew;
................................................................................
#else
  UNUSED_PARAMETER(pParse);
  UNUSED_PARAMETER(pBuilder);
#endif
  assert( pLower || pUpper );
  /* TUNING:  Each inequality constraint reduces the search space 4-fold.
  ** A BETWEEN operator, therefore, reduces the search space 16-fold */
  nNew = nOut;
  if( pLower && (pLower->wtFlags & TERM_VNULL)==0 ){
    nNew -= 20;        assert( 20==whereCost(4) );
    nOut--;
  }
  if( pUpper ){
    nNew -= 20;        assert( 20==whereCost(4) );
    nOut--;
  }
  if( nNew<10 ) nNew = 10;
  if( nNew<nOut ) nOut = nNew;
  *pnOut = (WhereCost)nOut;
  return rc;
}

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
/*
** Estimate the number of rows that will be returned based on
................................................................................
    ){
      /* This branch taken when p is equal or better than pTemplate in 
      ** all of (1) dependencies (2) setup-cost, (3) run-cost, and
      ** (4) number of output rows. */
      assert( p->rSetup==pTemplate->rSetup );
      if( p->prereq==pTemplate->prereq
       && p->nLTerm<pTemplate->nLTerm

       && (p->wsFlags & pTemplate->wsFlags & WHERE_INDEXED)!=0
       && (p->u.btree.pIndex==pTemplate->u.btree.pIndex
          || pTemplate->rRun+p->nLTerm<=p->rRun+pTemplate->nLTerm)
      ){
        /* Overwrite an existing WhereLoop with an similar one that uses
        ** more terms of the index */
        pNext = p->pNextLoop;
        break;
      }else{
        /* pTemplate is not helpful.
................................................................................
        ** Return without changing or adding anything */
        goto whereLoopInsert_noop;
      }
    }
    if( (p->prereq & pTemplate->prereq)==pTemplate->prereq
     && p->rRun>=pTemplate->rRun
     && p->nOut>=pTemplate->nOut

    ){
      /* Overwrite an existing WhereLoop with a better one: one that is
      ** better at one of (1) dependencies, (2) setup-cost, (3) run-cost
      ** or (4) number of output rows, and is no worse in any of those
      ** categories. */
      assert( p->rSetup>=pTemplate->rSetup ); /* SETUP-INVARIANT above */
      pNext = p->pNextLoop;
      break;
    }
  }

  /* If we reach this point it means that either p[] should be overwritten
  ** with pTemplate[] if p[] exists, or if p==NULL then allocate a new
................................................................................
  if( sqlite3WhereTrace & 0x8 ){
    sqlite3DebugPrintf("ins-noop: ");
    whereLoopPrint(pTemplate, pWInfo->pTabList);
  }
#endif
  return SQLITE_OK;  
}

/*
** Adjust the WhereLoop.nOut value downward to account for terms of the
** WHERE clause that reference the loop but which are not used by an
** index.
**
** In the current implementation, the first extra WHERE clause term reduces
** the number of output rows by a factor of 10 and each additional term
** reduces the number of output rows by sqrt(2).
*/
static void whereLoopOutputAdjust(WhereClause *pWC, WhereLoop *pLoop, int iCur){
  WhereTerm *pTerm, *pX;
  Bitmask notAllowed = ~(pLoop->prereq|pLoop->maskSelf);
  int i, j;

  if( !OptimizationEnabled(pWC->pWInfo->pParse->db, SQLITE_AdjustOutEst) ){
    return;
  }
  for(i=pWC->nTerm, pTerm=pWC->a; i>0; i--, pTerm++){
    if( (pTerm->wtFlags & TERM_VIRTUAL)!=0 ) break;
    if( (pTerm->prereqAll & pLoop->maskSelf)==0 ) continue;
    if( (pTerm->prereqAll & notAllowed)!=0 ) continue;
    for(j=pLoop->nLTerm-1; j>=0; j--){
      pX = pLoop->aLTerm[j];
      if( pX==pTerm ) break;
      if( pX->iParent>=0 && (&pWC->a[pX->iParent])==pTerm ) break;
    }
    if( j<0 ) pLoop->nOut += pTerm->truthProb;
  }
}

/*
** We have so far matched pBuilder->pNew->u.btree.nEq terms of the index pIndex.
** Try to match one more.
**
** If pProbe->tnum==0, that means pIndex is a fake index used for the
** INTEGER PRIMARY KEY.
................................................................................
    if( (pNew->wsFlags & (WHERE_IDX_ONLY|WHERE_IPK))==0 ){
      /* Each row involves a step of the index, then a binary search of
      ** the main table */
      pNew->rRun =  whereCostAdd(pNew->rRun, rLogSize>27 ? rLogSize-17 : 10);
    }
    /* Step cost for each output row */
    pNew->rRun = whereCostAdd(pNew->rRun, pNew->nOut);
    whereLoopOutputAdjust(pBuilder->pWC, pNew, pSrc->iCursor);
    rc = whereLoopInsert(pBuilder, pNew);
    if( (pNew->wsFlags & WHERE_TOP_LIMIT)==0
     && pNew->u.btree.nEq<(pProbe->nColumn + (pProbe->zName!=0))
    ){
      whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, nInMul+nIn);
    }
    pNew->nOut = saved_nOut;
................................................................................
      pNew->iSortIdx = b ? iSortIdx : 0;
      /* TUNING: Cost of full table scan is 3*(N + log2(N)).
      **  +  The extra 3 factor is to encourage the use of indexed lookups
      **     over full scans.  A smaller constant 2 is used for covering
      **     index scans so that a covering index scan will be favored over
      **     a table scan. */
      pNew->rRun = whereCostAdd(rSize,rLogSize) + 16;
      whereLoopOutputAdjust(pWC, pNew, pSrc->iCursor);
      rc = whereLoopInsert(pBuilder, pNew);
      pNew->nOut = rSize;
      if( rc ) break;
    }else{
      Bitmask m = pSrc->colUsed & ~columnsInIndex(pProbe);
      pNew->wsFlags = (m==0) ? (WHERE_IDX_ONLY|WHERE_INDEXED) : WHERE_INDEXED;

      /* Full scan via index */
      if( b
................................................................................
          pNew->rRun = 10 + whereCostAdd(rSize,rLogSize) - b;
        }else{
          assert( b!=0 ); 
          /* TUNING: Cost of scanning a non-covering index is (N+1)*log2(N)
          ** which we will simplify to just N*log2(N) */
          pNew->rRun = rSize + rLogSize;
        }
        whereLoopOutputAdjust(pWC, pNew, pSrc->iCursor);
        rc = whereLoopInsert(pBuilder, pNew);
        pNew->nOut = rSize;
        if( rc ) break;
      }
    }

    rc = whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, 0);
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
    sqlite3Stat4ProbeFree(pBuilder->pRec);
................................................................................
static int wherePathSolver(WhereInfo *pWInfo, WhereCost nRowEst){
  int mxChoice;             /* Maximum number of simultaneous paths tracked */
  int nLoop;                /* Number of terms in the join */
  Parse *pParse;            /* Parsing context */
  sqlite3 *db;              /* The database connection */
  int iLoop;                /* Loop counter over the terms of the join */
  int ii, jj;               /* Loop counters */
  int mxI = 0;              /* Index of next entry to replace */
  WhereCost rCost;          /* Cost of a path */
  WhereCost nOut;           /* Number of outputs */
  WhereCost mxCost = 0;     /* Maximum cost of a set of paths */
  WhereCost mxOut = 0;      /* Maximum nOut value on the set of paths */
  WhereCost rSortCost;      /* Cost to do a sort */
  int nTo, nFrom;           /* Number of valid entries in aTo[] and aFrom[] */
  WherePath *aFrom;         /* All nFrom paths at the previous level */
  WherePath *aTo;           /* The nTo best paths at the current level */
  WherePath *pFrom;         /* An element of aFrom[] that we are working on */
  WherePath *pTo;           /* An element of aTo[] that we are working on */
  WhereLoop *pWLoop;        /* One of the WhereLoop objects */
  WhereLoop **pX;           /* Used to divy up the pSpace memory */
................................................................................
        u8 isOrdered = pFrom->isOrdered;
        if( (pWLoop->prereq & ~pFrom->maskLoop)!=0 ) continue;
        if( (pWLoop->maskSelf & pFrom->maskLoop)!=0 ) continue;
        /* At this point, pWLoop is a candidate to be the next loop. 
        ** Compute its cost */
        rCost = whereCostAdd(pWLoop->rSetup,pWLoop->rRun + pFrom->nRow);
        rCost = whereCostAdd(rCost, pFrom->rCost);
        nOut = pFrom->nRow + pWLoop->nOut;
        maskNew = pFrom->maskLoop | pWLoop->maskSelf;
        if( !isOrderedValid ){
          switch( wherePathSatisfiesOrderBy(pWInfo,
                       pWInfo->pOrderBy, pFrom, pWInfo->wctrlFlags,
                       iLoop, pWLoop, &revMask) ){
            case 1:  /* Yes.  pFrom+pWLoop does satisfy the ORDER BY clause */
              isOrdered = 1;
................................................................................
              break;
          }
        }else{
          revMask = pFrom->revLoop;
        }
        /* Check to see if pWLoop should be added to the mxChoice best so far */
        for(jj=0, pTo=aTo; jj<nTo; jj++, pTo++){
          if( pTo->maskLoop==maskNew
           && pTo->isOrderedValid==isOrderedValid
           && ((pTo->rCost<=rCost && pTo->nRow<=nOut) ||
                (pTo->rCost>=rCost && pTo->nRow>=nOut))
          ){
            testcase( jj==nTo-1 );
            break;
          }
        }
        if( jj>=nTo ){
          if( nTo>=mxChoice && rCost>=mxCost ){
#ifdef WHERETRACE_ENABLED
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf("Skip   %s cost=%-3d,%3d order=%c\n",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                  isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
            }
#endif
            continue;
          }
          /* Add a new Path to the aTo[] set */
          if( nTo<mxChoice ){
            /* Increase the size of the aTo set by one */
            jj = nTo++;
          }else{
            /* New path replaces the prior worst to keep count below mxChoice */
            jj = mxI;
          }
          pTo = &aTo[jj];
#ifdef WHERETRACE_ENABLED
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf("New    %s cost=%-3d,%3d order=%c\n",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
          }
#endif
        }else{
          if( pTo->rCost<=rCost && pTo->nRow<=nOut ){
#ifdef WHERETRACE_ENABLED
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf(
                  "Skip   %s cost=%-3d,%3d order=%c",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                  isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
              sqlite3DebugPrintf("   vs %s cost=%-3d,%d order=%c\n",
                  wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                  pTo->isOrderedValid ? (pTo->isOrdered ? 'Y' : 'N') : '?');
            }
#endif
            testcase( pTo->rCost==rCost );
            continue;
          }
          testcase( pTo->rCost==rCost+1 );
          /* A new and better score for a previously created equivalent path */
#ifdef WHERETRACE_ENABLED
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf(
                "Update %s cost=%-3d,%3d order=%c",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                isOrderedValid ? (isOrdered ? 'Y' : 'N') : '?');
            sqlite3DebugPrintf("  was %s cost=%-3d,%3d order=%c\n",
                wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                pTo->isOrderedValid ? (pTo->isOrdered ? 'Y' : 'N') : '?');
          }
#endif
        }
        /* pWLoop is a winner.  Add it to the set of best so far */
        pTo->maskLoop = pFrom->maskLoop | pWLoop->maskSelf;
        pTo->revLoop = revMask;
        pTo->nRow = nOut;
        pTo->rCost = rCost;
        pTo->isOrderedValid = isOrderedValid;
        pTo->isOrdered = isOrdered;
        memcpy(pTo->aLoop, pFrom->aLoop, sizeof(WhereLoop*)*iLoop);
        pTo->aLoop[iLoop] = pWLoop;
        if( nTo>=mxChoice ){
          mxI = 0;
          mxCost = aTo[0].rCost;
          mxOut = aTo[0].nRow;
          for(jj=1, pTo=&aTo[1]; jj<mxChoice; jj++, pTo++){
            if( pTo->rCost>mxCost || (pTo->rCost==mxCost && pTo->nRow>mxOut) ){
              mxCost = pTo->rCost;
              mxOut = pTo->nRow;
              mxI = jj;
            }
          }
        }
      }
    }

#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace>=2 ){
................................................................................
    sqlite3ErrorMsg(pParse, "no query solution");
    sqlite3DbFree(db, pSpace);
    return SQLITE_ERROR;
  }
  
  /* Find the lowest cost path.  pFrom will be left pointing to that path */
  pFrom = aFrom;


  for(ii=1; ii<nFrom; ii++){
    if( pFrom->rCost>aFrom[ii].rCost ) pFrom = &aFrom[ii];
  }

  assert( pWInfo->nLevel==nLoop );
  /* Load the lowest cost path into pWInfo */
  for(iLoop=0; iLoop<nLoop; iLoop++){
    WhereLevel *pLevel = pWInfo->a + iLoop;
    pLevel->pWLoop = pWLoop = pFrom->aLoop[iLoop];
    pLevel->iFrom = pWLoop->iTab;
    pLevel->iTabCur = pWInfo->pTabList->a[pLevel->iFrom].iCursor;

Changes to test/analyze9.test

841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=10 AND c=10;
} {/USING INDEX i1/}
do_eqp_test 17.3 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=0 AND c=10;
} {/USING INDEX i1/}

do_execsql_test 17.4 {
  CREATE INDEX i2 ON t1(c);
  ANALYZE main.i2;
}
do_eqp_test 17.5 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=10 AND c=10;
} {/USING INDEX i1/}
do_eqp_test 17.6 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=0 AND c=10;







|







841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=10 AND c=10;
} {/USING INDEX i1/}
do_eqp_test 17.3 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=0 AND c=10;
} {/USING INDEX i1/}

do_execsql_test 17.4 {
  CREATE INDEX i2 ON t1(c, d);
  ANALYZE main.i2;
}
do_eqp_test 17.5 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=10 AND c=10;
} {/USING INDEX i1/}
do_eqp_test 17.6 {
  SELECT * FROM t1 WHERE d IS NOT NULL AND a=0 AND b=0 AND c=10;

Changes to test/fts4unicode.test

433
434
435
436
437
438
439
440






































































































441




}
do_execsql_test 8.2.2 {
  SELECT rowid FROM t4 WHERE t4 MATCH 'o';
} {1 3}
do_execsql_test 8.2.3 {
  SELECT rowid FROM t4 WHERE t4 MATCH 'a';
} {2 4}







































































































finish_test












>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

>
>
>
>
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
}
do_execsql_test 8.2.2 {
  SELECT rowid FROM t4 WHERE t4 MATCH 'o';
} {1 3}
do_execsql_test 8.2.3 {
  SELECT rowid FROM t4 WHERE t4 MATCH 'a';
} {2 4}

#-------------------------------------------------------------------------
#
foreach {tn sql} {
  1 {
    CREATE VIRTUAL TABLE t5 USING fts4(tokenize=unicode61 [tokenchars= .]);
    CREATE VIRTUAL TABLE t6 USING fts4(
        tokenize=unicode61 [tokenchars=="] "tokenchars=[]");
    CREATE VIRTUAL TABLE t7 USING fts4(tokenize=unicode61 [separators=x\xC4]);
  }
  2 {
    CREATE VIRTUAL TABLE t5 USING fts4(tokenize=unicode61 "tokenchars= .");
    CREATE VIRTUAL TABLE t6 USING fts4(tokenize=unicode61 "tokenchars=[=""]");
    CREATE VIRTUAL TABLE t7 USING fts4(tokenize=unicode61 "separators=x\xC4");
  }
  3 {
    CREATE VIRTUAL TABLE t5 USING fts4(tokenize=unicode61 'tokenchars= .');
    CREATE VIRTUAL TABLE t6 USING fts4(tokenize=unicode61 'tokenchars=="[]');
    CREATE VIRTUAL TABLE t7 USING fts4(tokenize=unicode61 'separators=x\xC4');
  }
  4 {
    CREATE VIRTUAL TABLE t5 USING fts4(tokenize=unicode61 `tokenchars= .`);
    CREATE VIRTUAL TABLE t6 USING fts4(tokenize=unicode61 `tokenchars=[="]`);
    CREATE VIRTUAL TABLE t7 USING fts4(tokenize=unicode61 `separators=x\xC4`);
  }
} {
  do_execsql_test 9.$tn.0 { 
    DROP TABLE IF EXISTS t5;
    DROP TABLE IF EXISTS t5aux;
    DROP TABLE IF EXISTS t6;
    DROP TABLE IF EXISTS t6aux;
    DROP TABLE IF EXISTS t7;
    DROP TABLE IF EXISTS t7aux;
  }
  do_execsql_test 9.$tn.1 $sql

  do_execsql_test 9.$tn.2 {
    CREATE VIRTUAL TABLE t5aux USING fts4aux(t5);
    INSERT INTO t5 VALUES('one two three/four.five.six');
    SELECT * FROM t5aux;
  } {
    four.five.six   * 1 1 four.five.six   0 1 1 
    {one two three} * 1 1 {one two three} 0 1 1
  }

  do_execsql_test 9.$tn.3 {
    CREATE VIRTUAL TABLE t6aux USING fts4aux(t6);
    INSERT INTO t6 VALUES('alpha=beta"gamma/delta[epsilon]zeta');
    SELECT * FROM t6aux;
  } {
    {alpha=beta"gamma}   * 1 1 {alpha=beta"gamma} 0 1 1 
    {delta[epsilon]zeta} * 1 1 {delta[epsilon]zeta} 0 1 1
  }

  do_execsql_test 9.$tn.4 {
    CREATE VIRTUAL TABLE t7aux USING fts4aux(t7);
    INSERT INTO t7 VALUES('alephxbeth\xC4gimel');
    SELECT * FROM t7aux;
  } {
    aleph * 1 1 aleph 0 1 1 
    beth  * 1 1 beth  0 1 1 
    gimel * 1 1 gimel 0 1 1
  }
}

# Check that multiple options are handled correctly.
#
do_execsql_test 10.1 {
  DROP TABLE IF EXISTS t1;
  CREATE VIRTUAL TABLE t1 USING fts4(tokenize=unicode61
    "tokenchars=xyz" "tokenchars=.=" "separators=.=" "separators=xy"
    "separators=a" "separators=a" "tokenchars=a" "tokenchars=a"
  );

  INSERT INTO t1 VALUES('oneatwoxthreeyfour');
  INSERT INTO t1 VALUES('a.single=word');
  CREATE VIRTUAL TABLE t1aux USING fts4aux(t1);
  SELECT * FROM t1aux;
} {
  .single=word * 1 1 .single=word 0 1 1 
  four         * 1 1 four         0 1 1 
  one          * 1 1 one          0 1 1 
  three        * 1 1 three        0 1 1 
  two          * 1 1 two          0 1 1
}

# Test that case folding happens after tokenization, not before.
#
do_execsql_test 10.2 {
  DROP TABLE IF EXISTS t2;
  CREATE VIRTUAL TABLE t2 USING fts4(tokenize=unicode61 "separators=aB");
  INSERT INTO t2 VALUES('oneatwoBthree');
  INSERT INTO t2 VALUES('onebtwoAthree');
  CREATE VIRTUAL TABLE t2aux USING fts4aux(t2);
  SELECT * FROM t2aux;
} {
  one           * 1 1 one           0 1 1 
  onebtwoathree * 1 1 onebtwoathree 0 1 1 
  three         * 1 1 three         0 1 1 
  two           * 1 1 two           0 1 1
}


finish_test




Changes to test/softheap1.test

20
21
22
23
24
25
26


27




28








29
30



31
32
33
34
35
36
37
source $testdir/tester.tcl

ifcapable !integrityck {
  finish_test
  return
}



sqlite3_soft_heap_limit -1




sqlite3_soft_heap_limit 0








sqlite3_soft_heap_limit 5000
do_test softheap1-1.1 {



  execsql {
    PRAGMA auto_vacuum=1;
    CREATE TABLE t1(x);
    INSERT INTO t1 VALUES(hex(randomblob(1000)));
    BEGIN;
  }
  execsql {







>
>
|
>
>
>
>
|
>
>
>
>
>
>
>
>

|
>
>
>







20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
source $testdir/tester.tcl

ifcapable !integrityck {
  finish_test
  return
}

do_test softheap1-1.0 {
  execsql {PRAGMA soft_heap_limit}
} [sqlite3_soft_heap_limit -1]
do_test softheap1-1.1 {
  execsql {PRAGMA soft_heap_limit=123456; PRAGMA soft_heap_limit;}
} {123456 123456}
do_test softheap1-1.2 {
  sqlite3_soft_heap_limit -1
} {123456}
do_test softheap1-1.3 {
  execsql {PRAGMA soft_heap_limit(-1); PRAGMA soft_heap_limit;}
} {123456 123456}
do_test softheap1-1.4 {
  execsql {PRAGMA soft_heap_limit(0); PRAGMA soft_heap_limit;}
} {0 0}

sqlite3_soft_heap_limit 5000
do_test softheap1-2.0 {
  execsql {PRAGMA soft_heap_limit}
} {5000}
do_test softheap1-2.1 {
  execsql {
    PRAGMA auto_vacuum=1;
    CREATE TABLE t1(x);
    INSERT INTO t1 VALUES(hex(randomblob(1000)));
    BEGIN;
  }
  execsql {

Changes to tool/build-all-msvc.bat

199
200
201
202
203
204
205
206
207
208
209








210
211
212
213
214
215
216
...
347
348
349
350
351
352
353




354

355
356
357
358
359
360
361
REM       external tools were found in the search above.
REM
SET TOOLPATH=%gawk.exe_PATH%;%tclsh85.exe_PATH%

%_VECHO% ToolPath = '%TOOLPATH%'

REM
REM NOTE: Check for MSVC 2012 because the Windows SDK directory handling is
REM       slightly different for that version.
REM
IF "%VisualStudioVersion%" == "11.0" (








  REM
  REM NOTE: If the Windows SDK library path has already been set, do not set
  REM       it to something else later on.
  REM
  IF NOT DEFINED NSDKLIBPATH (
    SET SET_NSDKLIBPATH=1
  )
................................................................................
        REM
        IF DEFINED SET_NSDKLIBPATH (
          IF DEFINED WindowsPhoneKitDir (
            CALL :fn_CopyVariable WindowsPhoneKitDir NSDKLIBPATH
            CALL :fn_AppendVariable NSDKLIBPATH \lib\x86
          ) ELSE IF DEFINED WindowsSdkDir (
            CALL :fn_CopyVariable WindowsSdkDir NSDKLIBPATH




            CALL :fn_AppendVariable NSDKLIBPATH \lib\win8\um\x86

          )
        )

        REM
        REM NOTE: Unless prevented from doing so, invoke NMAKE with the MSVC
        REM       makefile to clean any stale build output from previous
        REM       iterations of this loop and/or previous runs of this batch







|
|


>
>
>
>
>
>
>
>







 







>
>
>
>
|
>







199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
...
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
REM       external tools were found in the search above.
REM
SET TOOLPATH=%gawk.exe_PATH%;%tclsh85.exe_PATH%

%_VECHO% ToolPath = '%TOOLPATH%'

REM
REM NOTE: Check for MSVC 2012/2013 because the Windows SDK directory handling
REM       is slightly different for those versions.
REM
IF "%VisualStudioVersion%" == "11.0" (
  REM
  REM NOTE: If the Windows SDK library path has already been set, do not set
  REM       it to something else later on.
  REM
  IF NOT DEFINED NSDKLIBPATH (
    SET SET_NSDKLIBPATH=1
  )
) ELSE IF "%VisualStudioVersion%" == "12.0" (
  REM
  REM NOTE: If the Windows SDK library path has already been set, do not set
  REM       it to something else later on.
  REM
  IF NOT DEFINED NSDKLIBPATH (
    SET SET_NSDKLIBPATH=1
  )
................................................................................
        REM
        IF DEFINED SET_NSDKLIBPATH (
          IF DEFINED WindowsPhoneKitDir (
            CALL :fn_CopyVariable WindowsPhoneKitDir NSDKLIBPATH
            CALL :fn_AppendVariable NSDKLIBPATH \lib\x86
          ) ELSE IF DEFINED WindowsSdkDir (
            CALL :fn_CopyVariable WindowsSdkDir NSDKLIBPATH

            IF "%VisualStudioVersion%" == "12.0" (
              CALL :fn_AppendVariable NSDKLIBPATH \lib\winv6.3\um\x86
            ) ELSE (
              CALL :fn_AppendVariable NSDKLIBPATH \lib\win8\um\x86
            )
          )
        )

        REM
        REM NOTE: Unless prevented from doing so, invoke NMAKE with the MSVC
        REM       makefile to clean any stale build output from previous
        REM       iterations of this loop and/or previous runs of this batch

Changes to tool/mkvsix.tcl

61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
...
251
252
253
254
255
256
257


258
259
260
261










262
263
264
265


266
267
268
269
270
271
272
273
274
275
276
#
# The first argument to this script is required and must be the name of the
# top-level directory containing the directories and files organized into a
# tree as described in item 6 of the PREREQUISITES section, above.  The second
# argument is optional and if present must contain the name of the directory
# containing the root of the source tree for SQLite.  The third argument is
# optional and if present must contain the flavor the VSIX package to build.
# Currently, the only supported package flavors are "WinRT" and "WP80".  The
# fourth argument is optional and if present must be a string containing a list
# of platforms to include in the VSIX package.  The format of the platform list
# string is "platform1,platform2,platform3".  Typically, when on Windows, this
# script is executed using commands similar to the following from a normal
# Windows command prompt:
#
#                         CD /D C:\dev\sqlite\core
#                         tclsh85 tool\mkvsix.tcl C:\Temp
#
# In the example above, "C:\dev\sqlite\core" represents the root of the source
# tree for SQLite and "C:\Temp" represents the top-level directory containing
# the executable and other compiled binary files, organized into a directory
................................................................................
  fail "invalid package flavor"
}

if {[string equal -nocase $packageFlavor WinRT]} then {
  set shortName SQLite.WinRT
  set displayName "SQLite for Windows Runtime"
  set targetPlatformIdentifier Windows


  set extraSdkPath ""
  set extraFileListAttributes [appendArgs \
      "\r\n    " {AppliesTo="WindowsAppContainer"} \
      "\r\n    " {DependsOn="Microsoft.VCLibs, version=11.0"}]










} elseif {[string equal -nocase $packageFlavor WP80]} then {
  set shortName SQLite.WP80
  set displayName "SQLite for Windows Phone"
  set targetPlatformIdentifier "Windows Phone"


  set extraSdkPath "\\..\\$targetPlatformIdentifier"
  set extraFileListAttributes ""
} else {
  fail "unsupported package flavor, must be \"WinRT\" or \"WP80\""
}

if {$argc >= 4} then {
  set platformNames [list]

  foreach platformName [split [lindex $argv 3] ", "] {
    if {[string length $platformName] > 0} then {







|
|
|
|
|
|







 







>
>




>
>
>
>
>
>
>
>
>
>




>
>



|







61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
...
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
#
# The first argument to this script is required and must be the name of the
# top-level directory containing the directories and files organized into a
# tree as described in item 6 of the PREREQUISITES section, above.  The second
# argument is optional and if present must contain the name of the directory
# containing the root of the source tree for SQLite.  The third argument is
# optional and if present must contain the flavor the VSIX package to build.
# Currently, the only supported package flavors are "WinRT", "WinRT81", and
# "WP80".  The fourth argument is optional and if present must be a string
# containing a list of platforms to include in the VSIX package.  The format
# of the platform list string is "platform1,platform2,platform3".  Typically,
# when on Windows, this script is executed using commands similar to the
# following from a normal Windows command prompt:
#
#                         CD /D C:\dev\sqlite\core
#                         tclsh85 tool\mkvsix.tcl C:\Temp
#
# In the example above, "C:\dev\sqlite\core" represents the root of the source
# tree for SQLite and "C:\Temp" represents the top-level directory containing
# the executable and other compiled binary files, organized into a directory
................................................................................
  fail "invalid package flavor"
}

if {[string equal -nocase $packageFlavor WinRT]} then {
  set shortName SQLite.WinRT
  set displayName "SQLite for Windows Runtime"
  set targetPlatformIdentifier Windows
  set targetPlatformVersion v8.0
  set minVsVersion 11.0
  set extraSdkPath ""
  set extraFileListAttributes [appendArgs \
      "\r\n    " {AppliesTo="WindowsAppContainer"} \
      "\r\n    " {DependsOn="Microsoft.VCLibs, version=11.0"}]
} elseif {[string equal -nocase $packageFlavor WinRT81]} then {
  set shortName SQLite.WinRT81
  set displayName "SQLite for Windows Runtime (Windows 8.1)"
  set targetPlatformIdentifier Windows
  set targetPlatformVersion v8.1
  set minVsVersion 12.0
  set extraSdkPath ""
  set extraFileListAttributes [appendArgs \
      "\r\n    " {AppliesTo="WindowsAppContainer"} \
      "\r\n    " {DependsOn="Microsoft.VCLibs, version=12.0"}]
} elseif {[string equal -nocase $packageFlavor WP80]} then {
  set shortName SQLite.WP80
  set displayName "SQLite for Windows Phone"
  set targetPlatformIdentifier "Windows Phone"
  set targetPlatformVersion v8.0
  set minVsVersion 11.0
  set extraSdkPath "\\..\\$targetPlatformIdentifier"
  set extraFileListAttributes ""
} else {
  fail "unsupported package flavor, must be \"WinRT\", \"WinRT81\", or \"WP80\""
}

if {$argc >= 4} then {
  set platformNames [list]

  foreach platformName [split [lindex $argv 3] ", "] {
    if {[string length $platformName] > 0} then {

Changes to tool/win/sqlite.vsix

cannot compute difference between binary files