︙ | | |
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
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
|
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
|
/*
** Virtual-table cursor object.
**
** iSpecial:
** If this is a 'special' query (refer to function fts5SpecialMatch()),
** then this variable contains the result of the query.
**
** iFirstRowid, iLastRowid:
** These variables are only used for FTS5_PLAN_MATCH cursors. Assuming the
** cursor iterates in ascending order of rowids, iFirstRowid is the lower
** limit of rowids to return, and iLastRowid the upper. In other words, the
** WHERE clause in the user's query might have been:
**
** <tbl> MATCH <expr> AND rowid BETWEEN $iFirstRowid AND $iLastRowid
**
** If the cursor iterates in descending order of rowid, iFirstRowid
** is the upper limit (i.e. the "first" rowid visited) and iLastRowid
** the lower.
*/
struct Fts5Cursor {
sqlite3_vtab_cursor base; /* Base class used by SQLite core */
int idxNum; /* idxNum passed to xFilter() */
int ePlan; /* FTS5_PLAN_XXX value */
int bDesc; /* True for "ORDER BY rowid DESC" queries */
i64 iFirstRowid; /* Return no rowids earlier than this */
i64 iLastRowid; /* Return no rowids later than this */
sqlite3_stmt *pStmt; /* Statement used to read %_content */
Fts5Expr *pExpr; /* Expression for MATCH queries */
Fts5Sorter *pSorter; /* Sorter for "ORDER BY rank" queries */
int csrflags; /* Mask of cursor flags (see below) */
Fts5Cursor *pNext; /* Next cursor in Fts5Cursor.pCsr list */
i64 iSpecial; /* Result of special query */
|
︙ | | |
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
|
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
|
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
|
/* Variables used by auxiliary functions */
i64 iCsrId; /* Cursor id */
Fts5Auxiliary *pAux; /* Currently executing extension function */
Fts5Auxdata *pAuxdata; /* First in linked list of saved aux-data */
int *aColumnSize; /* Values for xColumnSize() */
/* Cache used by auxiliary functions xInst() and xInstCount() */
int nInstCount; /* Number of phrase instances */
int *aInst; /* 3 integers per phrase instance */
};
/*
** Bits that make up the "idxNum" parameter passed indirectly by
** xBestIndex() to xFilter().
*/
#define FTS5_BI_MATCH 0x0001 /* <tbl> MATCH ? */
#define FTS5_BI_RANK 0x0002 /* rank MATCH ? */
#define FTS5_BI_ROWID_EQ 0x0004 /* rowid == ? */
#define FTS5_BI_ROWID_LE 0x0008 /* rowid <= ? */
#define FTS5_BI_ROWID_GE 0x0010 /* rowid >= ? */
#define FTS5_BI_ORDER_RANK 0x0020
#define FTS5_BI_ORDER_ROWID 0x0040
#define FTS5_BI_ORDER_DESC 0x0080
/*
** Values for Fts5Cursor.csrflags
*/
#define FTS5CSR_REQUIRE_CONTENT 0x01
#define FTS5CSR_REQUIRE_DOCSIZE 0x02
#define FTS5CSR_EOF 0x04
#define FTS5CSR_FREE_ZRANK 0x08
#define FTS5CSR_REQUIRE_RESEEK 0x10
#define BitFlagAllTest(x,y) (((x) & (y))==(y))
#define BitFlagTest(x,y) (((x) & (y))!=0)
/*
** Constants for the largest and smallest possible 64-bit signed integers.
** These are copied from sqliteInt.h.
*/
#ifndef SQLITE_AMALGAMATION
# define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32))
# define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)
#endif
/*
** Macros to Set(), Clear() and Test() cursor flags.
*/
#define CsrFlagSet(pCsr, flag) ((pCsr)->csrflags |= (flag))
#define CsrFlagClear(pCsr, flag) ((pCsr)->csrflags &= ~(flag))
#define CsrFlagTest(pCsr, flag) ((pCsr)->csrflags & (flag))
|
︙ | | |
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
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
|
432
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
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
|
-
+
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
-
-
-
-
+
+
+
+
+
+
-
-
-
+
+
-
-
-
-
-
-
-
+
+
+
-
-
-
-
+
+
+
+
+
+
+
-
-
-
+
+
+
-
-
-
+
+
+
+
+
+
+
+
-
-
-
+
+
-
-
+
+
-
-
-
+
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
-
-
-
+
+
+
+
+
-
-
-
+
+
+
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
|
sqlite3_vtab **ppVtab, /* OUT: New sqlite3_vtab object */
char **pzErr /* OUT: sqlite3_malloc'd error message */
){
return fts5InitVtab(1, db, pAux, argc, argv, ppVtab, pzErr);
}
/*
** The three query plans xBestIndex may choose between.
** The different query plans.
*/
#define FTS5_PLAN_SCAN 1 /* No usable constraint */
#define FTS5_PLAN_MATCH 2 /* (<tbl> MATCH ?) */
#define FTS5_PLAN_SORTED_MATCH 3 /* (<tbl> MATCH ? ORDER BY rank) */
#define FTS5_PLAN_ROWID 4 /* (rowid = ?) */
#define FTS5_PLAN_SOURCE 5 /* A source cursor for SORTED_MATCH */
#define FTS5_PLAN_SPECIAL 6 /* An internal query */
#define FTS5_PLAN(idxNum) ((idxNum) & 0x7)
#define FTS5_ORDER_DESC 8 /* ORDER BY rowid DESC */
#define FTS5_ORDER_ASC 16 /* ORDER BY rowid ASC */
/*
/*
** Implementation of the xBestIndex method for FTS5 tables. Within the
** WHERE constraint, it searches for the following:
**
** 1. A MATCH constraint against the special column.
** 2. A MATCH constraint against the "rank" column.
** 3. An == constraint against the rowid column.
** 4. A < or <= constraint against the rowid column.
** 5. A > or >= constraint against the rowid column.
**
** Within the ORDER BY, either:
**
** 5. ORDER BY rank [ASC|DESC]
** 6. ORDER BY rowid [ASC|DESC]
**
** Costs are assigned as follows:
**
** Search the object passed as the first argument for a usable constraint
** on column iCol using operator eOp. If one is found, return its index in
** a) If an unusable MATCH operator is present in the WHERE clause, the
** the pInfo->aConstraint[] array. If no such constraint is found, return
** a negative value.
*/
static int fts5FindConstraint(sqlite3_index_info *pInfo, int eOp, int iCol){
** cost is unconditionally set to 1e50 (a really big number).
**
** a) If a MATCH operator is present, the cost depends on the other
** constraints also present. As follows:
**
** * No other constraints: cost=1000.0
int i;
for(i=0; i<pInfo->nConstraint; i++){
struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
** * One rowid range constraint: cost=750.0
** * Both rowid range constraints: cost=500.0
if( p->usable && p->iColumn==iCol && p->op==eOp ) return i;
}
return -1;
}
/*
** Implementation of the xBestIndex method for FTS5 tables. There
** * An == rowid constraint: cost=100.0
**
** b) Otherwise, if there is no MATCH:
** are three possible strategies, in order of preference:
**
** 1. Full-text search using a MATCH operator.
** 2. A by-rowid lookup.
** 3. A full-table scan.
** * No other constraints: cost=1000000.0
** * One rowid range constraint: cost=750000.0
** * Both rowid range constraints: cost=250000.0
** * An == rowid constraint: cost=10.0
**
** Costs are not modified by the ORDER BY clause.
*/
static int fts5BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){
Fts5Table *pTab = (Fts5Table*)pVTab;
Fts5Config *pConfig = pTab->pConfig;
int idxFlags = 0; /* Parameter passed through to xFilter() */
int iCons;
int ePlan = FTS5_PLAN_SCAN;
int iRankMatch;
int bHasMatch;
int iNext;
int i;
iCons = fts5FindConstraint(pInfo,SQLITE_INDEX_CONSTRAINT_MATCH,pConfig->nCol);
if( iCons>=0 ){
ePlan = FTS5_PLAN_MATCH;
struct Constraint {
int op; /* Mask against sqlite3_index_constraint.op */
int fts5op; /* FTS5 mask for idxFlags */
int iCol; /* 0==rowid, 1==tbl, 2==rank */
int omit; /* True to omit this if found */
int iConsIndex; /* Index in pInfo->aConstraint[] */
} aConstraint[] = {
{SQLITE_INDEX_CONSTRAINT_MATCH, FTS5_BI_MATCH, 1, 1, -1},
pInfo->estimatedCost = 1.0;
}else{
iCons = fts5FindConstraint(pInfo, SQLITE_INDEX_CONSTRAINT_EQ, -1);
{SQLITE_INDEX_CONSTRAINT_MATCH, FTS5_BI_RANK, 2, 1, -1},
{SQLITE_INDEX_CONSTRAINT_EQ, FTS5_BI_ROWID_EQ, 0, 0, -1},
if( iCons>=0 ){
ePlan = FTS5_PLAN_ROWID;
{SQLITE_INDEX_CONSTRAINT_LT|SQLITE_INDEX_CONSTRAINT_LE,
FTS5_BI_ROWID_LE, 0, 0, -1},
pInfo->estimatedCost = 2.0;
}
}
{SQLITE_INDEX_CONSTRAINT_GT|SQLITE_INDEX_CONSTRAINT_GE,
FTS5_BI_ROWID_GE, 0, 0, -1},
};
int aColMap[3];
aColMap[0] = -1;
aColMap[1] = pConfig->nCol;
aColMap[2] = pConfig->nCol+1;
/* Set idxFlags flags for all WHERE clause terms that will be used. */
if( iCons>=0 ){
pInfo->aConstraintUsage[iCons].argvIndex = 1;
pInfo->aConstraintUsage[iCons].omit = 1;
}else{
pInfo->estimatedCost = 10000000.0;
}
for(i=0; i<pInfo->nConstraint; i++){
struct sqlite3_index_constraint *p = &pInfo->aConstraint[i];
int j;
for(j=0; j<sizeof(aConstraint)/sizeof(aConstraint[0]); j++){
struct Constraint *pC = &aConstraint[j];
if( p->iColumn==aColMap[pC->iCol] && p->op & pC->op ){
if( p->usable ){
pC->iConsIndex = i;
idxFlags |= pC->fts5op;
}else if( j==0 ){
/* As there exists an unusable MATCH constraint this is an
** unusable plan. Set a prohibitively high cost. */
pInfo->estimatedCost = 1e50;
return SQLITE_OK;
}
}
}
}
/* Set idxFlags flags for the ORDER BY clause */
if( pInfo->nOrderBy==1 ){
int iSort = pInfo->aOrderBy[0].iColumn;
if( iSort<0 ){
/* ORDER BY rowid [ASC|DESC] */
if( iSort==(pConfig->nCol+1) && BitFlagTest(idxFlags, FTS5_BI_MATCH) ){
idxFlags |= FTS5_BI_ORDER_RANK;
pInfo->orderByConsumed = 1;
}else if( iSort==(pConfig->nCol+1) && ePlan==FTS5_PLAN_MATCH ){
/* ORDER BY rank [ASC|DESC] */
}else if( iSort==-1 ){
idxFlags |= FTS5_BI_ORDER_ROWID;
}
if( BitFlagTest(idxFlags, FTS5_BI_ORDER_RANK|FTS5_BI_ORDER_ROWID) ){
pInfo->orderByConsumed = 1;
if( pInfo->aOrderBy[0].desc ){
ePlan = FTS5_PLAN_SORTED_MATCH;
}
idxFlags |= FTS5_BI_ORDER_DESC;
}
}
if( pInfo->orderByConsumed ){
ePlan |= pInfo->aOrderBy[0].desc ? FTS5_ORDER_DESC : FTS5_ORDER_ASC;
}
}
iRankMatch = fts5FindConstraint(
}
/* Calculate the estimated cost based on the flags set in idxFlags. */
bHasMatch = BitFlagTest(idxFlags, FTS5_BI_MATCH);
if( BitFlagTest(idxFlags, FTS5_BI_ROWID_EQ) ){
pInfo->estimatedCost = bHasMatch ? 100.0 : 10.0;
}else if( BitFlagAllTest(idxFlags, FTS5_BI_ROWID_LE|FTS5_BI_ROWID_GE) ){
pInfo->estimatedCost = bHasMatch ? 500.0 : 250000.0;
}else if( BitFlagTest(idxFlags, FTS5_BI_ROWID_LE|FTS5_BI_ROWID_GE) ){
pInfo->estimatedCost = bHasMatch ? 750.0 : 750000.0;
}else{
pInfo->estimatedCost = bHasMatch ? 1000.0 : 1000000.0;
}
pInfo, SQLITE_INDEX_CONSTRAINT_MATCH, pConfig->nCol+1
);
if( iRankMatch>=0 ){
pInfo->aConstraintUsage[iRankMatch].argvIndex = 1 + (iCons>=0);
pInfo->aConstraintUsage[iRankMatch].omit = 1;
}
pInfo->idxNum = ePlan;
/* Assign argvIndex values to each constraint in use. */
iNext = 1;
for(i=0; i<sizeof(aConstraint)/sizeof(aConstraint[0]); i++){
struct Constraint *pC = &aConstraint[i];
if( pC->iConsIndex>=0 ){
pInfo->aConstraintUsage[pC->iConsIndex].argvIndex = iNext++;
pInfo->aConstraintUsage[pC->iConsIndex].omit = pC->omit;
}
}
pInfo->idxNum = idxFlags;
return SQLITE_OK;
}
/*
** Implementation of xOpen method.
*/
static int fts5OpenMethod(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCsr){
|
︙ | | |
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
|
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
|
-
-
-
+
+
+
|
}else{
rc = SQLITE_NOMEM;
}
*ppCsr = (sqlite3_vtab_cursor*)pCsr;
return rc;
}
static int fts5StmtType(int idxNum){
if( FTS5_PLAN(idxNum)==FTS5_PLAN_SCAN ){
return (idxNum&FTS5_ORDER_DESC) ? FTS5_STMT_SCAN_DESC : FTS5_STMT_SCAN_ASC;
static int fts5StmtType(Fts5Cursor *pCsr){
if( pCsr->ePlan==FTS5_PLAN_SCAN ){
return (pCsr->bDesc) ? FTS5_STMT_SCAN_DESC : FTS5_STMT_SCAN_ASC;
}
return FTS5_STMT_LOOKUP;
}
/*
** This function is called after the cursor passed as the only argument
** is moved to point at a different row. It clears all cached data
|
︙ | | |
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
|
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
|
-
+
-
+
|
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
Fts5Cursor **pp;
Fts5Auxdata *pData;
Fts5Auxdata *pNext;
fts5CsrNewrow(pCsr);
if( pCsr->pStmt ){
int eStmt = fts5StmtType(pCsr->idxNum);
int eStmt = fts5StmtType(pCsr);
sqlite3Fts5StorageStmtRelease(pTab->pStorage, eStmt, pCsr->pStmt);
}
if( pCsr->pSorter ){
Fts5Sorter *pSorter = pCsr->pSorter;
sqlite3_finalize(pSorter->pStmt);
sqlite3_free(pSorter);
}
if( pCsr->idxNum!=FTS5_PLAN_SOURCE ){
if( pCsr->ePlan!=FTS5_PLAN_SOURCE ){
sqlite3Fts5ExprFree(pCsr->pExpr);
}
for(pData=pCsr->pAuxdata; pData; pData=pNext){
pNext = pData->pNext;
if( pData->xDelete ) pData->xDelete(pData->pPtr);
sqlite3_free(pData);
|
︙ | | |
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
|
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
|
-
+
|
/*
** Set the FTS5CSR_REQUIRE_RESEEK flag on all FTS5_PLAN_MATCH cursors
** open on table pTab.
*/
static void fts5TripCursors(Fts5Table *pTab){
Fts5Cursor *pCsr;
for(pCsr=pTab->pGlobal->pCsr; pCsr; pCsr=pCsr->pNext){
if( FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_MATCH
if( pCsr->ePlan==FTS5_PLAN_MATCH
&& pCsr->base.pVtab==(sqlite3_vtab*)pTab
){
CsrFlagSet(pCsr, FTS5CSR_REQUIRE_RESEEK);
}
}
}
|
︙ | | |
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
|
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
|
-
+
-
+
-
-
+
-
-
-
+
-
-
-
|
** error code if an error occurred.
*/
static int fts5CursorReseek(Fts5Cursor *pCsr, int *pbSkip){
int rc = SQLITE_OK;
assert( *pbSkip==0 );
if( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_RESEEK) ){
Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);
int bDesc = ((pCsr->idxNum & FTS5_ORDER_DESC) ? 1 : 0);
int bDesc = pCsr->bDesc;
i64 iRowid = sqlite3Fts5ExprRowid(pCsr->pExpr);
rc = sqlite3Fts5ExprFirst(pCsr->pExpr, pTab->pIndex, bDesc);
rc = sqlite3Fts5ExprFirst(pCsr->pExpr, pTab->pIndex, iRowid, bDesc);
while( rc==SQLITE_OK && sqlite3Fts5ExprEof(pCsr->pExpr)==0 ){
i64 ii = sqlite3Fts5ExprRowid(pCsr->pExpr);
if( rc==SQLITE_OK && iRowid!=sqlite3Fts5ExprRowid(pCsr->pExpr) ){
if( ii==iRowid ) break;
if( (bDesc && ii<iRowid) || (bDesc==0 && ii>iRowid) ){
*pbSkip = 1;
*pbSkip = 1;
break;
}
rc = sqlite3Fts5ExprNext(pCsr->pExpr);
}
CsrFlagClear(pCsr, FTS5CSR_REQUIRE_RESEEK);
fts5CsrNewrow(pCsr);
if( sqlite3Fts5ExprEof(pCsr->pExpr) ){
CsrFlagSet(pCsr, FTS5CSR_EOF);
}
|
︙ | | |
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
|
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
|
-
+
-
+
|
**
** Return SQLITE_OK if nothing goes wrong. SQLITE_OK is returned
** even if we reach end-of-file. The fts5EofMethod() will be called
** subsequently to determine whether or not an EOF was hit.
*/
static int fts5NextMethod(sqlite3_vtab_cursor *pCursor){
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
int ePlan = FTS5_PLAN(pCsr->idxNum);
int ePlan = pCsr->ePlan;
int bSkip = 0;
int rc;
if( (rc = fts5CursorReseek(pCsr, &bSkip)) || bSkip ) return rc;
switch( ePlan ){
case FTS5_PLAN_MATCH:
case FTS5_PLAN_SOURCE:
rc = sqlite3Fts5ExprNext(pCsr->pExpr);
rc = sqlite3Fts5ExprNext(pCsr->pExpr, pCsr->iLastRowid);
if( sqlite3Fts5ExprEof(pCsr->pExpr) ){
CsrFlagSet(pCsr, FTS5CSR_EOF);
}
fts5CsrNewrow(pCsr);
break;
case FTS5_PLAN_SPECIAL: {
|
︙ | | |
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
|
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
|
+
-
-
+
+
|
}
return rc;
}
static int fts5CursorFirst(Fts5Table *pTab, Fts5Cursor *pCsr, int bDesc){
int rc;
Fts5Expr *pExpr = pCsr->pExpr;
rc = sqlite3Fts5ExprFirst(pCsr->pExpr, pTab->pIndex, bDesc);
if( sqlite3Fts5ExprEof(pCsr->pExpr) ){
rc = sqlite3Fts5ExprFirst(pExpr, pTab->pIndex, pCsr->iFirstRowid, bDesc);
if( sqlite3Fts5ExprEof(pExpr) ){
CsrFlagSet(pCsr, FTS5CSR_EOF);
}
fts5CsrNewrow(pCsr);
return rc;
}
/*
|
︙ | | |
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
|
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
|
-
+
|
const char *z = zQuery; /* Special query text */
int n; /* Number of bytes in text at z */
while( z[0]==' ' ) z++;
for(n=0; z[n] && z[n]!=' '; n++);
assert( pTab->base.zErrMsg==0 );
pCsr->idxNum = FTS5_PLAN_SPECIAL;
pCsr->ePlan = FTS5_PLAN_SPECIAL;
if( 0==sqlite3_strnicmp("reads", z, n) ){
pCsr->iSpecial = sqlite3Fts5IndexReads(pTab->pIndex);
}
else if( 0==sqlite3_strnicmp("id", z, n) ){
pCsr->iSpecial = pCsr->iCsrId;
}
|
︙ | | |
922
923
924
925
926
927
928
929
930
931
932
933
934
935
|
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
|
+
+
+
+
+
+
+
+
+
+
|
}else{
pCsr->zRank = (char*)FTS5_DEFAULT_RANK;
pCsr->zRankArgs = 0;
}
}
return rc;
}
static i64 fts5GetRowidLimit(sqlite3_value *pVal, i64 iDefault){
if( pVal ){
int eType = sqlite3_value_numeric_type(pVal);
if( eType==SQLITE_INTEGER ){
return sqlite3_value_int64(pVal);
}
}
return iDefault;
}
/*
** This is the xFilter interface for the virtual table. See
** the virtual table xFilter method documentation for additional
** information.
**
** There are three possible query strategies:
|
︙ | | |
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
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
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
|
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
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
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
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
|
-
-
+
+
+
+
+
+
+
+
+
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
+
+
-
+
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
-
-
-
-
+
+
+
-
+
|
int idxNum, /* Strategy index */
const char *idxStr, /* Unused */
int nVal, /* Number of elements in apVal */
sqlite3_value **apVal /* Arguments for the indexing scheme */
){
Fts5Table *pTab = (Fts5Table*)(pCursor->pVtab);
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
int bDesc = ((idxNum & FTS5_ORDER_DESC) ? 1 : 0);
int rc = SQLITE_OK;
int rc = SQLITE_OK; /* Error code */
int iVal = 0; /* Counter for apVal[] */
int bDesc; /* True if ORDER BY [rank|rowid] DESC */
int bOrderByRank; /* True if ORDER BY rank */
sqlite3_value *pMatch = 0; /* <tbl> MATCH ? expression (or NULL) */
sqlite3_value *pRank = 0; /* rank MATCH ? expression (or NULL) */
sqlite3_value *pRowidEq = 0; /* rowid = ? expression (or NULL) */
sqlite3_value *pRowidLe = 0; /* rowid <= ? expression (or NULL) */
sqlite3_value *pRowidGe = 0; /* rowid >= ? expression (or NULL) */
char **pzErrmsg = pTab->pConfig->pzErrmsg;
assert( pzErrmsg==0 || pzErrmsg==&pTab->base.zErrMsg );
pTab->pConfig->pzErrmsg = &pTab->base.zErrMsg;
assert( nVal<=2 );
assert( pCsr->pStmt==0 );
assert( pCsr->pExpr==0 );
assert( pCsr->csrflags==0 );
assert( pCsr->pRank==0 );
assert( pCsr->zRank==0 );
assert( pCsr->zRankArgs==0 );
assert( pzErrmsg==0 || pzErrmsg==&pTab->base.zErrMsg );
pTab->pConfig->pzErrmsg = &pTab->base.zErrMsg;
/* Decode the arguments passed through to this function.
**
** Note: The following set of if(...) statements must be in the same
** order as the corresponding entries in the struct at the top of
** fts5BestIndexMethod(). */
if( BitFlagTest(idxNum, FTS5_BI_MATCH) ) pMatch = apVal[iVal++];
if( BitFlagTest(idxNum, FTS5_BI_RANK) ) pRank = apVal[iVal++];
if( BitFlagTest(idxNum, FTS5_BI_ROWID_EQ) ) pRowidEq = apVal[iVal++];
if( BitFlagTest(idxNum, FTS5_BI_ROWID_LE) ) pRowidLe = apVal[iVal++];
if( BitFlagTest(idxNum, FTS5_BI_ROWID_GE) ) pRowidGe = apVal[iVal++];
assert( iVal==nVal );
bOrderByRank = ((idxNum & FTS5_BI_ORDER_RANK) ? 1 : 0);
pCsr->bDesc = bDesc = ((idxNum & FTS5_BI_ORDER_DESC) ? 1 : 0);
/* Set the cursor upper and lower rowid limits. Only some strategies
** actually use them. This is ok, as the xBestIndex() method leaves the
** sqlite3_index_constraint.omit flag clear for range constraints
** on the rowid field. */
if( pRowidEq ){
pRowidLe = pRowidGe = pRowidEq;
}
if( bDesc ){
pCsr->iFirstRowid = fts5GetRowidLimit(pRowidLe, LARGEST_INT64);
pCsr->iLastRowid = fts5GetRowidLimit(pRowidGe, SMALLEST_INT64);
}else{
pCsr->iLastRowid = fts5GetRowidLimit(pRowidLe, LARGEST_INT64);
pCsr->iFirstRowid = fts5GetRowidLimit(pRowidGe, SMALLEST_INT64);
}
if( pTab->pSortCsr ){
/* If pSortCsr is non-NULL, then this call is being made as part of
** processing for a "... MATCH <expr> ORDER BY rank" query (ePlan is
** set to FTS5_PLAN_SORTED_MATCH). pSortCsr is the cursor that will
** return results to the user for this query. The current cursor
** (pCursor) is used to execute the query issued by function
** fts5CursorFirstSorted() above. */
assert( pRowidEq==0 && pRowidLe==0 && pRowidGe==0 && pRank==0 );
assert( nVal==0 && pMatch==0 && bOrderByRank==0 && bDesc==0 );
assert( FTS5_PLAN(idxNum)==FTS5_PLAN_SCAN );
pCsr->idxNum = FTS5_PLAN_SOURCE;
assert( pCsr->iLastRowid==LARGEST_INT64 );
assert( pCsr->iFirstRowid==SMALLEST_INT64 );
pCsr->ePlan = FTS5_PLAN_SOURCE;
pCsr->pExpr = pTab->pSortCsr->pExpr;
rc = fts5CursorFirst(pTab, pCsr, bDesc);
}else{
}else if( pMatch ){
int ePlan = FTS5_PLAN(idxNum);
pCsr->idxNum = idxNum;
if( ePlan==FTS5_PLAN_MATCH || ePlan==FTS5_PLAN_SORTED_MATCH ){
const char *zExpr = (const char*)sqlite3_value_text(apVal[0]);
const char *zExpr = (const char*)sqlite3_value_text(apVal[0]);
rc = fts5CursorParseRank(pTab->pConfig, pCsr, (nVal==2 ? apVal[1] : 0));
if( rc==SQLITE_OK ){
if( zExpr[0]=='*' ){
/* The user has issued a query of the form "MATCH '*...'". This
** indicates that the MATCH expression is not a full text query,
** but a request for an internal parameter. */
rc = fts5SpecialMatch(pTab, pCsr, &zExpr[1]);
}else{
char **pzErr = &pTab->base.zErrMsg;
rc = sqlite3Fts5ExprNew(pTab->pConfig, zExpr, &pCsr->pExpr, pzErr);
if( rc==SQLITE_OK ){
if( ePlan==FTS5_PLAN_MATCH ){
rc = fts5CursorFirst(pTab, pCsr, bDesc);
}else{
rc = fts5CursorFirstSorted(pTab, pCsr, bDesc);
}
}
}
}
}else{
/* This is either a full-table scan (ePlan==FTS5_PLAN_SCAN) or a lookup
** by rowid (ePlan==FTS5_PLAN_ROWID). */
rc = fts5CursorParseRank(pTab->pConfig, pCsr, pRank);
if( rc==SQLITE_OK ){
if( zExpr[0]=='*' ){
/* The user has issued a query of the form "MATCH '*...'". This
** indicates that the MATCH expression is not a full text query,
** but a request for an internal parameter. */
rc = fts5SpecialMatch(pTab, pCsr, &zExpr[1]);
}else{
char **pzErr = &pTab->base.zErrMsg;
rc = sqlite3Fts5ExprNew(pTab->pConfig, zExpr, &pCsr->pExpr, pzErr);
if( rc==SQLITE_OK ){
if( bOrderByRank ){
pCsr->ePlan = FTS5_PLAN_SORTED_MATCH;
rc = fts5CursorFirstSorted(pTab, pCsr, bDesc);
}else{
pCsr->ePlan = FTS5_PLAN_MATCH;
rc = fts5CursorFirst(pTab, pCsr, bDesc);
}
}
}
}
}else{
/* This is either a full-table scan (ePlan==FTS5_PLAN_SCAN) or a lookup
** by rowid (ePlan==FTS5_PLAN_ROWID). */
int eStmt = fts5StmtType(idxNum);
rc = sqlite3Fts5StorageStmt(
pTab->pStorage, eStmt, &pCsr->pStmt, &pTab->base.zErrMsg
);
if( rc==SQLITE_OK ){
if( ePlan==FTS5_PLAN_ROWID ){
sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
}
rc = fts5NextMethod(pCursor);
pCsr->ePlan = (pRowidEq ? FTS5_PLAN_ROWID : FTS5_PLAN_SCAN);
rc = sqlite3Fts5StorageStmt(
pTab->pStorage, fts5StmtType(pCsr), &pCsr->pStmt, &pTab->base.zErrMsg
);
if( rc==SQLITE_OK ){
if( pCsr->ePlan==FTS5_PLAN_ROWID ){
sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]);
}
rc = fts5NextMethod(pCursor);
}
}
}
pTab->pConfig->pzErrmsg = pzErrmsg;
return rc;
}
/*
** This is the xEof method of the virtual table. SQLite calls this
** routine to find out if it has reached the end of a result set.
*/
static int fts5EofMethod(sqlite3_vtab_cursor *pCursor){
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
return (CsrFlagTest(pCsr, FTS5CSR_EOF) ? 1 : 0);
}
/*
** Return the rowid that the cursor currently points to.
*/
static i64 fts5CursorRowid(Fts5Cursor *pCsr){
assert( FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_MATCH
|| FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_SORTED_MATCH
|| FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_SOURCE
assert( pCsr->ePlan==FTS5_PLAN_MATCH
|| pCsr->ePlan==FTS5_PLAN_SORTED_MATCH
|| pCsr->ePlan==FTS5_PLAN_SOURCE
);
if( pCsr->pSorter ){
return pCsr->pSorter->iRowid;
}else{
return sqlite3Fts5ExprRowid(pCsr->pExpr);
}
}
/*
** This is the xRowid method. The SQLite core calls this routine to
** retrieve the rowid for the current row of the result set. fts5
** exposes %_content.docid as the rowid for the virtual table. The
** rowid should be written to *pRowid.
*/
static int fts5RowidMethod(sqlite3_vtab_cursor *pCursor, sqlite_int64 *pRowid){
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
int ePlan = FTS5_PLAN(pCsr->idxNum);
int ePlan = pCsr->ePlan;
assert( CsrFlagTest(pCsr, FTS5CSR_EOF)==0 );
switch( ePlan ){
case FTS5_PLAN_SPECIAL:
*pRowid = 0;
break;
|
︙ | | |
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
|
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
|
-
+
|
*/
static int fts5SeekCursor(Fts5Cursor *pCsr){
int rc = SQLITE_OK;
/* If the cursor does not yet have a statement handle, obtain one now. */
if( pCsr->pStmt==0 ){
Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);
int eStmt = fts5StmtType(pCsr->idxNum);
int eStmt = fts5StmtType(pCsr);
rc = sqlite3Fts5StorageStmt(
pTab->pStorage, eStmt, &pCsr->pStmt, &pTab->base.zErrMsg
);
assert( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_CONTENT) );
}
if( rc==SQLITE_OK && CsrFlagTest(pCsr, FTS5CSR_REQUIRE_CONTENT) ){
|
︙ | | |
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
|
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
|
-
+
+
+
|
Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);
int rc;
Fts5Cursor *pNew = 0;
rc = fts5OpenMethod(pCsr->base.pVtab, (sqlite3_vtab_cursor**)&pNew);
if( rc==SQLITE_OK ){
Fts5Config *pConf = pTab->pConfig;
pNew->idxNum = FTS5_PLAN_MATCH;
pNew->ePlan = FTS5_PLAN_MATCH;
pNew->iFirstRowid = SMALLEST_INT64;
pNew->iLastRowid = LARGEST_INT64;
pNew->base.pVtab = (sqlite3_vtab*)pTab;
rc = sqlite3Fts5ExprPhraseExpr(pConf, pCsr->pExpr, iPhrase, &pNew->pExpr);
}
if( rc==SQLITE_OK ){
for(rc = fts5CursorFirst(pTab, pNew, 0);
rc==SQLITE_OK && CsrFlagTest(pNew, FTS5CSR_EOF)==0;
|
︙ | | |
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
|
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
|
-
+
-
+
-
-
+
+
|
Fts5Table *pTab = (Fts5Table*)(pCursor->pVtab);
Fts5Config *pConfig = pTab->pConfig;
Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
int rc = SQLITE_OK;
assert( CsrFlagTest(pCsr, FTS5CSR_EOF)==0 );
if( pCsr->idxNum==FTS5_PLAN_SPECIAL ){
if( pCsr->ePlan==FTS5_PLAN_SPECIAL ){
if( iCol==pConfig->nCol ){
sqlite3_result_int64(pCtx, pCsr->iSpecial);
}
}else
if( iCol==pConfig->nCol ){
/* User is requesting the value of the special column with the same name
** as the table. Return the cursor integer id number. This value is only
** useful in that it may be passed as the first argument to an FTS5
** auxiliary function. */
sqlite3_result_int64(pCtx, pCsr->iCsrId);
}else if( iCol==pConfig->nCol+1 ){
/* The value of the "rank" column. */
if( FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_SOURCE ){
if( pCsr->ePlan==FTS5_PLAN_SOURCE ){
fts5PoslistBlob(pCtx, pCsr);
}else if(
FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_MATCH
|| FTS5_PLAN(pCsr->idxNum)==FTS5_PLAN_SORTED_MATCH
pCsr->ePlan==FTS5_PLAN_MATCH
|| pCsr->ePlan==FTS5_PLAN_SORTED_MATCH
){
if( pCsr->pRank || SQLITE_OK==(rc = fts5FindRankFunction(pCsr)) ){
fts5ApiInvoke(pCsr->pRank, pCsr, pCtx, pCsr->nRankArg, pCsr->apRankArg);
}
}
}else if( !fts5IsContentless(pTab) ){
rc = fts5SeekCursor(pCsr);
|
︙ | | |