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Overview
Comment: | Add the remember(V,PTR) extension function which copies an SQL value into an application variable. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
d2d30914d81022d7d4e1670caf932652 |
User & Date: | drh 2016-11-30 16:54:52.848 |
Context
2016-12-01
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19:38 | Avoid clearing the EP_FromJoin flag from terms in ON clauses when flattening sub-selects. Possible fix for [2df0107b]. (Closed-Leaf check-in: 8bed4cd549 user: dan tags: left-join-fix) | |
18:57 | Performance improvement for GLOB and LIKE matching for patterns with two or more multi-character wildcards ("*" or "%"). (check-in: 2df0ebf95f user: drh tags: trunk) | |
17:34 | Modify the patternCompare() function (used for GLOB, LIKE) to better handle patterns containing multiple wildcard characters ("*", "%"). (check-in: c5e5614d98 user: dan tags: pattern-compare-optimization) | |
2016-11-30
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16:54 | Add the remember(V,PTR) extension function which copies an SQL value into an application variable. (check-in: d2d30914d8 user: drh tags: trunk) | |
14:47 | Fix then handling of the (oversized) integer literal -0x8000000000000000. (check-in: 3816bb415e user: drh tags: trunk) | |
2016-08-09
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21:08 | Prototype for the remember(V,PTR) extension function. (Closed-Leaf check-in: f0942c362f user: drh tags: rememberFunc) | |
Changes
Changes to Makefile.in.
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426 427 428 429 430 431 432 433 434 435 436 437 438 439 | $(TOP)/ext/fts5/fts5_tcl.c \ $(TOP)/ext/fts5/fts5_test_mi.c \ $(TOP)/ext/fts5/fts5_test_tok.c \ $(TOP)/ext/misc/ieee754.c \ $(TOP)/ext/misc/nextchar.c \ $(TOP)/ext/misc/percentile.c \ $(TOP)/ext/misc/regexp.c \ $(TOP)/ext/misc/series.c \ $(TOP)/ext/misc/spellfix.c \ $(TOP)/ext/misc/totype.c \ $(TOP)/ext/misc/wholenumber.c # Source code to the library files needed by the test fixture # | > | 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 | $(TOP)/ext/fts5/fts5_tcl.c \ $(TOP)/ext/fts5/fts5_test_mi.c \ $(TOP)/ext/fts5/fts5_test_tok.c \ $(TOP)/ext/misc/ieee754.c \ $(TOP)/ext/misc/nextchar.c \ $(TOP)/ext/misc/percentile.c \ $(TOP)/ext/misc/regexp.c \ $(TOP)/ext/misc/remember.c \ $(TOP)/ext/misc/series.c \ $(TOP)/ext/misc/spellfix.c \ $(TOP)/ext/misc/totype.c \ $(TOP)/ext/misc/wholenumber.c # Source code to the library files needed by the test fixture # |
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Changes to Makefile.msc.
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1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 | $(TOP)\ext\fts5\fts5_tcl.c \ $(TOP)\ext\fts5\fts5_test_mi.c \ $(TOP)\ext\fts5\fts5_test_tok.c \ $(TOP)\ext\misc\ieee754.c \ $(TOP)\ext\misc\nextchar.c \ $(TOP)\ext\misc\percentile.c \ $(TOP)\ext\misc\regexp.c \ $(TOP)\ext\misc\series.c \ $(TOP)\ext\misc\spellfix.c \ $(TOP)\ext\misc\totype.c \ $(TOP)\ext\misc\wholenumber.c # Source code to the library files needed by the test fixture # (non-amalgamation) | > | 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 | $(TOP)\ext\fts5\fts5_tcl.c \ $(TOP)\ext\fts5\fts5_test_mi.c \ $(TOP)\ext\fts5\fts5_test_tok.c \ $(TOP)\ext\misc\ieee754.c \ $(TOP)\ext\misc\nextchar.c \ $(TOP)\ext\misc\percentile.c \ $(TOP)\ext\misc\regexp.c \ $(TOP)\ext\misc\remember.c \ $(TOP)\ext\misc\series.c \ $(TOP)\ext\misc\spellfix.c \ $(TOP)\ext\misc\totype.c \ $(TOP)\ext\misc\wholenumber.c # Source code to the library files needed by the test fixture # (non-amalgamation) |
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Added ext/misc/remember.c.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | /* ** 2016-08-09 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** ** This file demonstrates how to create an SQL function that is a pass-through ** for integer values (it returns a copy of its argument) but also saves the ** value that is passed through into a C-language variable. The address of ** the C-language variable is supplied as the second argument. ** ** This allows, for example, a counter to incremented and the original ** value retrieved, atomically, using a single statement: ** ** UPDATE counterTab SET cnt=remember(cnt,$PTR)+1 WHERE id=$ID ** ** Prepare the above statement once. Then to use it, bind the address ** of the output variable to $PTR and the id of the counter to $ID and ** run the prepared statement. ** ** One can imagine doing similar things with floating-point values and ** strings, but this demonstration extension will stick to using just ** integers. */ #include "sqlite3ext.h" SQLITE_EXTENSION_INIT1 #include <assert.h> /* ** remember(V,PTR) ** ** Return the integer value V. Also save the value of V in a ** C-language variable whose address is PTR. */ static void rememberFunc( sqlite3_context *pCtx, int argc, sqlite3_value **argv ){ sqlite3_int64 v; sqlite3_int64 ptr; assert( argc==2 ); v = sqlite3_value_int64(argv[0]); ptr = sqlite3_value_int64(argv[1]); *((sqlite3_int64*)ptr) = v; sqlite3_result_int64(pCtx, v); } #ifdef _WIN32 __declspec(dllexport) #endif int sqlite3_remember_init( sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines *pApi ){ int rc = SQLITE_OK; SQLITE_EXTENSION_INIT2(pApi); rc = sqlite3_create_function(db, "remember", 2, SQLITE_UTF8, 0, rememberFunc, 0, 0); return rc; } |
Changes to main.mk.
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331 332 333 334 335 336 337 338 339 340 341 342 343 344 | $(TOP)/ext/misc/eval.c \ $(TOP)/ext/misc/fileio.c \ $(TOP)/ext/misc/fuzzer.c \ $(TOP)/ext/misc/ieee754.c \ $(TOP)/ext/misc/nextchar.c \ $(TOP)/ext/misc/percentile.c \ $(TOP)/ext/misc/regexp.c \ $(TOP)/ext/misc/series.c \ $(TOP)/ext/misc/spellfix.c \ $(TOP)/ext/misc/totype.c \ $(TOP)/ext/misc/wholenumber.c \ $(TOP)/ext/misc/vfslog.c \ $(TOP)/ext/fts5/fts5_tcl.c \ $(TOP)/ext/fts5/fts5_test_mi.c \ | > | 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 | $(TOP)/ext/misc/eval.c \ $(TOP)/ext/misc/fileio.c \ $(TOP)/ext/misc/fuzzer.c \ $(TOP)/ext/misc/ieee754.c \ $(TOP)/ext/misc/nextchar.c \ $(TOP)/ext/misc/percentile.c \ $(TOP)/ext/misc/regexp.c \ $(TOP)/ext/misc/remember.c \ $(TOP)/ext/misc/series.c \ $(TOP)/ext/misc/spellfix.c \ $(TOP)/ext/misc/totype.c \ $(TOP)/ext/misc/wholenumber.c \ $(TOP)/ext/misc/vfslog.c \ $(TOP)/ext/fts5/fts5_tcl.c \ $(TOP)/ext/fts5/fts5_test_mi.c \ |
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Changes to src/test1.c.
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6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 | extern int sqlite3_eval_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_fileio_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_fuzzer_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_ieee_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_nextchar_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_percentile_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_regexp_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_series_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_spellfix_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_totype_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_wholenumber_init(sqlite3*,char**,const sqlite3_api_routines*); static const struct { const char *zExtName; int (*pInit)(sqlite3*,char**,const sqlite3_api_routines*); } aExtension[] = { { "amatch", sqlite3_amatch_init }, { "carray", sqlite3_carray_init }, { "closure", sqlite3_closure_init }, { "csv", sqlite3_csv_init }, { "eval", sqlite3_eval_init }, { "fileio", sqlite3_fileio_init }, { "fuzzer", sqlite3_fuzzer_init }, { "ieee754", sqlite3_ieee_init }, { "nextchar", sqlite3_nextchar_init }, { "percentile", sqlite3_percentile_init }, { "regexp", sqlite3_regexp_init }, { "series", sqlite3_series_init }, { "spellfix", sqlite3_spellfix_init }, { "totype", sqlite3_totype_init }, { "wholenumber", sqlite3_wholenumber_init }, }; sqlite3 *db; const char *zName; | > > | 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 | extern int sqlite3_eval_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_fileio_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_fuzzer_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_ieee_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_nextchar_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_percentile_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_regexp_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_remember_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_series_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_spellfix_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_totype_init(sqlite3*,char**,const sqlite3_api_routines*); extern int sqlite3_wholenumber_init(sqlite3*,char**,const sqlite3_api_routines*); static const struct { const char *zExtName; int (*pInit)(sqlite3*,char**,const sqlite3_api_routines*); } aExtension[] = { { "amatch", sqlite3_amatch_init }, { "carray", sqlite3_carray_init }, { "closure", sqlite3_closure_init }, { "csv", sqlite3_csv_init }, { "eval", sqlite3_eval_init }, { "fileio", sqlite3_fileio_init }, { "fuzzer", sqlite3_fuzzer_init }, { "ieee754", sqlite3_ieee_init }, { "nextchar", sqlite3_nextchar_init }, { "percentile", sqlite3_percentile_init }, { "regexp", sqlite3_regexp_init }, { "remember", sqlite3_remember_init }, { "series", sqlite3_series_init }, { "spellfix", sqlite3_spellfix_init }, { "totype", sqlite3_totype_init }, { "wholenumber", sqlite3_wholenumber_init }, }; sqlite3 *db; const char *zName; |
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Changes to test/tabfunc01.test.
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19 20 21 22 23 24 25 26 27 28 29 30 31 32 | ifcapable !vtab { finish_test return } load_static_extension db series load_static_extension db carray do_execsql_test tabfunc01-1.1 { SELECT *, '|' FROM generate_series WHERE start=1 AND stop=9 AND step=2; } {1 | 3 | 5 | 7 | 9 |} do_execsql_test tabfunc01-1.2 { SELECT *, '|' FROM generate_series LIMIT 5; } {0 | 1 | 2 | 3 | 4 |} | > | 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | ifcapable !vtab { finish_test return } load_static_extension db series load_static_extension db carray load_static_extension db remember do_execsql_test tabfunc01-1.1 { SELECT *, '|' FROM generate_series WHERE start=1 AND stop=9 AND step=2; } {1 | 3 | 5 | 7 | 9 |} do_execsql_test tabfunc01-1.2 { SELECT *, '|' FROM generate_series LIMIT 5; } {0 | 1 | 2 | 3 | 4 |} |
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168 169 170 171 172 173 174 175 176 177 178 179 180 181 | do_test tabfunc01-720 { set PTR [int64array_addr 5 7 13 17 23] db eval { SELECT b FROM t600, carray($PTR,5,'int64') WHERE a=value; } } {(005) (007) (013) (017) (023)} do_test tabfunc01-730 { set PTR [doublearray_addr 5.0 7.0 13.0 17.0 23.0] db eval { SELECT b FROM t600, carray($PTR,5,'double') WHERE a=value; } } {(005) (007) (013) (017) (023)} | > > > > > > > > > > > > > | 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | do_test tabfunc01-720 { set PTR [int64array_addr 5 7 13 17 23] db eval { SELECT b FROM t600, carray($PTR,5,'int64') WHERE a=value; } } {(005) (007) (013) (017) (023)} do_test tabfunc01-721 { db eval { SELECT remember(123,$PTR); SELECT value FROM carray($PTR,5,'int64'); } } {123 123 7 13 17 23} do_test tabfunc01-722 { set PTR2 [expr {$PTR+16}] db eval { SELECT remember(987,$PTR2); SELECT value FROM carray($PTR,5,'int64'); } } {987 123 7 987 17 23} do_test tabfunc01-730 { set PTR [doublearray_addr 5.0 7.0 13.0 17.0 23.0] db eval { SELECT b FROM t600, carray($PTR,5,'double') WHERE a=value; } } {(005) (007) (013) (017) (023)} |
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