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Overview
Comment: | Simplifications to vdbe.c in support of coverage testing. (CVS 6794) |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
16680f05bd169dfb1b4bf0eb082e6970 |
User & Date: | drh 2009-06-22 00:55:31.000 |
Context
2009-06-22
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05:43 | If an OOM error occurs just after obtaining a shared lock on the database file, release the lock before returning. (CVS 6795) (check-in: 971a9650f6 user: danielk1977 tags: trunk) | |
00:55 | Simplifications to vdbe.c in support of coverage testing. (CVS 6794) (check-in: 16680f05bd user: drh tags: trunk) | |
2009-06-20
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18:52 | When recovering from the error-state in pagerSharedLock(), do not search for a hot-journal in the file-system if the pager is configured to use an anonymous temp file as the journal. (CVS 6793) (check-in: 4b46805cbc user: danielk1977 tags: trunk) | |
Changes
Changes to src/vdbe.c.
︙ | ︙ | |||
39 40 41 42 43 44 45 | ** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** | | | 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | ** ** Various scripts scan this source file in order to generate HTML ** documentation, headers files, or other derived files. The formatting ** of the code in this file is, therefore, important. See other comments ** in this file for details. If in doubt, do not deviate from existing ** commenting and indentation practices when changing or adding code. ** ** $Id: vdbe.c,v 1.858 2009/06/22 00:55:31 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* ** The following global variable is incremented every time a cursor ** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes. The test |
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1103 1104 1105 1106 1107 1108 1109 1110 1111 | ** ** In case this is such a statement, close any statement transaction ** opened by this VM before returning control to the user. This is to ** ensure that statement-transactions are always nested, not overlapping. ** If the open statement-transaction is not closed here, then the user ** may step another VM that opens its own statement transaction. This ** may lead to overlapping statement transactions. */ assert( p->iStatement==0 || db->flags&SQLITE_CountRows ); | > > > | > | 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 | ** ** In case this is such a statement, close any statement transaction ** opened by this VM before returning control to the user. This is to ** ensure that statement-transactions are always nested, not overlapping. ** If the open statement-transaction is not closed here, then the user ** may step another VM that opens its own statement transaction. This ** may lead to overlapping statement transactions. ** ** The statement transaction is never a top-level transaction. Hence ** the RELEASE call below can never fail. */ assert( p->iStatement==0 || db->flags&SQLITE_CountRows ); rc = sqlite3VdbeCloseStatement(p, SAVEPOINT_RELEASE); if( NEVER(rc!=SQLITE_OK) ){ break; } /* Invalidate all ephemeral cursor row caches */ p->cacheCtr = (p->cacheCtr + 2)|1; /* Make sure the results of the current row are \000 terminated |
︙ | ︙ | |||
2048 2049 2050 2051 2052 2053 2054 | if( pC->nullRow ){ payloadSize = 0; }else if( pC->cacheStatus==p->cacheCtr ){ payloadSize = pC->payloadSize; zRec = (char*)pC->aRow; }else if( pC->isIndex ){ sqlite3BtreeKeySize(pCrsr, &payloadSize64); | > > > | < < < | 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 | if( pC->nullRow ){ payloadSize = 0; }else if( pC->cacheStatus==p->cacheCtr ){ payloadSize = pC->payloadSize; zRec = (char*)pC->aRow; }else if( pC->isIndex ){ sqlite3BtreeKeySize(pCrsr, &payloadSize64); /* sqlite3BtreeParseCellPtr() uses getVarint32() to extract the ** payload size, so it is impossible for payloadSize64 to be ** larger than 32 bits. */ assert( (payloadSize64 & SQLITE_MAX_U32)==(u64)payloadSize64 ); payloadSize = (u32)payloadSize64; }else{ sqlite3BtreeDataSize(pCrsr, &payloadSize); } nField = pC->nField; }else{ assert( pC->pseudoTable ); |
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2937 2938 2939 2940 2941 2942 2943 | } if( pOp->p5 ){ assert( p2>0 ); assert( p2<=p->nMem ); pIn2 = &p->aMem[p2]; sqlite3VdbeMemIntegerify(pIn2); p2 = (int)pIn2->u.i; | | < < < < < > | > | < | | | 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 | } if( pOp->p5 ){ assert( p2>0 ); assert( p2<=p->nMem ); pIn2 = &p->aMem[p2]; sqlite3VdbeMemIntegerify(pIn2); p2 = (int)pIn2->u.i; if( NEVER(p2<2) ) { rc = SQLITE_CORRUPT_BKPT; goto abort_due_to_error; } } assert( i>=0 ); if( pOp->p4type==P4_KEYINFO ){ pKeyInfo = pOp->p4.pKeyInfo; pKeyInfo->enc = ENC(p->db); nField = pKeyInfo->nField+1; }else if( pOp->p4type==P4_INT32 ){ nField = pOp->p4.i; } pCur = allocateCursor(p, i, nField, iDb, 1); if( pCur==0 ) goto no_mem; pCur->nullRow = 1; rc = sqlite3BtreeCursor(pX, p2, wrFlag, pKeyInfo, pCur->pCursor); pCur->pKeyInfo = pKeyInfo; switch( rc ){ case SQLITE_OK: { flags = sqlite3BtreeFlags(pCur->pCursor); /* Sanity checking. Only the lower four bits of the flags byte should ** be used. Bit 3 (mask 0x08) is unpredictable. The lower 3 bits ** (mask 0x07) should be either 5 (intkey+leafdata for tables) or ** 2 (zerodata for indices). If these conditions are not met it can ** only mean that we are dealing with a corrupt database file. ** Note: All of the above is checked already in sqlite3BtreeCursor(). */ assert( (flags & 0xf0)==0 ); assert( (flags & 0x07)==5 || (flags & 0x07)==2 ); pCur->isTable = (flags & BTREE_INTKEY)!=0 ?1:0; pCur->isIndex = (flags & BTREE_ZERODATA)!=0 ?1:0; /* If P4==0 it means we are expected to open a table. If P4!=0 then ** we expect to be opening an index. If this is not what happened, ** then the database is corrupt */ if( (pCur->isTable && pOp->p4type==P4_KEYINFO) |
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2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 | pCur->isTable = pOp->p4type!=P4_KEYINFO; pCur->isIndex = !pCur->isTable; pCur->pCursor = 0; rc = SQLITE_OK; break; } default: { goto abort_due_to_error; } } break; } /* Opcode: OpenEphemeral P1 P2 * P4 * | > | 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 | pCur->isTable = pOp->p4type!=P4_KEYINFO; pCur->isIndex = !pCur->isTable; pCur->pCursor = 0; rc = SQLITE_OK; break; } default: { assert( rc!=SQLITE_BUSY ); /* Busy conditions detected earlier */ goto abort_due_to_error; } } break; } /* Opcode: OpenEphemeral P1 P2 * P4 * |
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3213 3214 3215 3216 3217 3218 3219 | break; } /* If we reach this point, then the P3 value must be a floating ** point number. */ assert( (pIn3->flags & MEM_Real)!=0 ); if( iKey==SMALLEST_INT64 && (pIn3->r<(double)iKey || pIn3->r>0) ){ | | | 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 | break; } /* If we reach this point, then the P3 value must be a floating ** point number. */ assert( (pIn3->flags & MEM_Real)!=0 ); if( iKey==SMALLEST_INT64 && (pIn3->r<(double)iKey || pIn3->r>0) ){ /* The P3 value is too large in magnitude to be expressed as an ** integer. */ res = 1; if( pIn3->r<0 ){ if( oc==OP_SeekGt || oc==OP_SeekGe ){ rc = sqlite3BtreeFirst(pC->pCursor, &res); if( rc!=SQLITE_OK ) goto abort_due_to_error; } |
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3296 3297 3298 3299 3300 3301 3302 | res = sqlite3BtreeEof(pC->pCursor); } } assert( pOp->p2>0 ); if( res ){ pc = pOp->p2 - 1; } | | > | 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 | res = sqlite3BtreeEof(pC->pCursor); } } assert( pOp->p2>0 ); if( res ){ pc = pOp->p2 - 1; } }else{ /* This happens when attempting to open the sqlite3_master table ** for read access returns SQLITE_EMPTY. In this case always ** take the jump (since there are no records in the table). */ assert( pC->pseudoTable==0 ); pc = pOp->p2 - 1; } break; } /* Opcode: Seek P1 P2 * * * ** |
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3323 3324 3325 3326 3327 3328 3329 | int i; VdbeCursor *pC; i = pOp->p1; assert( i>=0 && i<p->nCursor ); pC = p->apCsr[i]; assert( pC!=0 ); | | | 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 | int i; VdbeCursor *pC; i = pOp->p1; assert( i>=0 && i<p->nCursor ); pC = p->apCsr[i]; assert( pC!=0 ); if( ALWAYS(pC->pCursor!=0) ){ assert( pC->isTable ); pC->nullRow = 0; pC->movetoTarget = sqlite3VdbeIntValue(pIn2); pC->rowidIsValid = 0; pC->deferredMoveto = 1; } break; |
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3366 3367 3368 3369 3370 3371 3372 | ** to P2. If an entry does existing, fall through. The cursor is left ** pointing to the entry that matches. ** ** See also: Found, NotExists, IsUnique */ case OP_NotFound: /* jump, in3 */ case OP_Found: { /* jump, in3 */ | < < | > | | | 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 | ** to P2. If an entry does existing, fall through. The cursor is left ** pointing to the entry that matches. ** ** See also: Found, NotExists, IsUnique */ case OP_NotFound: /* jump, in3 */ case OP_Found: { /* jump, in3 */ int alreadyExists; VdbeCursor *pC; int res; UnpackedRecord *pIdxKey; char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*3 + 7]; alreadyExists = 0; assert( pOp->p1>=0 && pOp->p1<p->nCursor ); pC = p->apCsr[pOp->p1]; assert( pC!=0 ); if( ALWAYS(pC->pCursor!=0) ){ assert( pC->isTable==0 ); assert( pIn3->flags & MEM_Blob ); pIdxKey = sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, aTempRec, sizeof(aTempRec)); if( pIdxKey==0 ){ goto no_mem; |
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3503 3504 3505 3506 3507 3508 3509 | ** operation assumes the key is an integer and that P1 is a table whereas ** NotFound assumes key is a blob constructed from MakeRecord and ** P1 is an index. ** ** See also: Found, NotFound, IsUnique */ case OP_NotExists: { /* jump, in3 */ | < | | > | > | > < < | | > | 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 | ** operation assumes the key is an integer and that P1 is a table whereas ** NotFound assumes key is a blob constructed from MakeRecord and ** P1 is an index. ** ** See also: Found, NotFound, IsUnique */ case OP_NotExists: { /* jump, in3 */ VdbeCursor *pC; BtCursor *pCrsr; int res; u64 iKey; assert( pIn3->flags & MEM_Int ); assert( pOp->p1>=0 && pOp->p1<p->nCursor ); pC = p->apCsr[pOp->p1]; assert( pC!=0 ); assert( pC->isTable ); pCrsr = pC->pCursor; if( pCrsr!=0 ){ res = 0; iKey = pIn3->u.i; rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res); pC->lastRowid = pIn3->u.i; pC->rowidIsValid = res==0 ?1:0; pC->nullRow = 0; pC->cacheStatus = CACHE_STALE; pC->deferredMoveto = 0; if( res!=0 ){ pc = pOp->p2 - 1; assert( pC->rowidIsValid==0 ); } pC->seekResult = res; }else{ /* This happens when an attempt to open a read cursor on the ** sqlite_master table returns SQLITE_EMPTY. */ assert( !pC->pseudoTable ); assert( pC->isTable ); pc = pOp->p2 - 1; assert( pC->rowidIsValid==0 ); pC->seekResult = 0; } break; } |
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3572 3573 3574 3575 3576 3577 3578 | ** generated record number. No new record numbers are allowed to be less ** than this value. When this value reaches its maximum, a SQLITE_FULL ** error is generated. The P3 register is updated with the generated ** record number. This P3 mechanism is used to help implement the ** AUTOINCREMENT feature. */ case OP_NewRowid: { /* out2-prerelease */ | < | | | < | < | < < | > | | | < < < < < < < < < < < < < < < < < < > < < < < < < < | 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 | ** generated record number. No new record numbers are allowed to be less ** than this value. When this value reaches its maximum, a SQLITE_FULL ** error is generated. The P3 register is updated with the generated ** record number. This P3 mechanism is used to help implement the ** AUTOINCREMENT feature. */ case OP_NewRowid: { /* out2-prerelease */ i64 v; /* The new rowid */ VdbeCursor *pC; /* Cursor of table to get the new rowid */ int res; /* Result of an sqlite3BtreeLast() */ int cnt; /* Counter to limit the number of searches */ Mem *pMem; /* Register holding largest rowid for AUTOINCREMENT */ v = 0; res = 0; assert( pOp->p1>=0 && pOp->p1<p->nCursor ); pC = p->apCsr[pOp->p1]; assert( pC!=0 ); if( NEVER(pC->pCursor==0) ){ /* The zero initialization above is all that is needed */ }else{ /* The next rowid or record number (different terms for the same ** thing) is obtained in a two-step algorithm. ** ** First we attempt to find the largest existing rowid and add one ** to that. But if the largest existing rowid is already the maximum ** positive integer, we have to fall through to the second ** probabilistic algorithm ** ** The second algorithm is to select a rowid at random and see if ** it already exists in the table. If it does not exist, we have ** succeeded. If the random rowid does exist, we select a new one ** and try again, up to 100 times. */ assert( pC->isTable ); cnt = 0; #ifdef SQLITE_32BIT_ROWID # define MAX_ROWID 0x7fffffff #else /* Some compilers complain about constants of the form 0x7fffffffffffffff. ** Others complain about 0x7ffffffffffffffffLL. The following macro seems ** to provide the constant while making all compilers happy. |
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3651 3652 3653 3654 3655 3656 3657 | if( rc!=SQLITE_OK ){ goto abort_due_to_error; } if( res ){ v = 1; }else{ sqlite3BtreeKeySize(pC->pCursor, &v); | < | 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 | if( rc!=SQLITE_OK ){ goto abort_due_to_error; } if( res ){ v = 1; }else{ sqlite3BtreeKeySize(pC->pCursor, &v); if( v==MAX_ROWID ){ pC->useRandomRowid = 1; }else{ v++; } } } |
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3681 3682 3683 3684 3685 3686 3687 | pMem->u.i = v; } #endif sqlite3BtreeSetCachedRowid(pC->pCursor, v<MAX_ROWID ? v+1 : 0); } if( pC->useRandomRowid ){ | | > < < | | | | 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 | pMem->u.i = v; } #endif sqlite3BtreeSetCachedRowid(pC->pCursor, v<MAX_ROWID ? v+1 : 0); } if( pC->useRandomRowid ){ assert( pOp->p3==0 ); /* We cannot be in random rowid mode if this is ** an AUTOINCREMENT table. */ v = db->priorNewRowid; cnt = 0; do{ if( cnt==0 && (v&0xffffff)==v ){ v++; }else{ sqlite3_randomness(sizeof(v), &v); if( cnt<5 ) v &= 0xffffff; } rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, 0, (u64)v, 0, &res); cnt++; }while( cnt<100 && rc==SQLITE_OK && res==0 ); db->priorNewRowid = v; if( rc==SQLITE_OK && res==0 ){ rc = SQLITE_FULL; goto abort_due_to_error; } } pC->rowidIsValid = 0; pC->deferredMoveto = 0; pC->cacheStatus = CACHE_STALE; |
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3761 3762 3763 3764 3765 3766 3767 | assert( pC!=0 ); assert( pC->pCursor!=0 || pC->pseudoTable ); assert( pKey->flags & MEM_Int ); assert( pC->isTable ); REGISTER_TRACE(pOp->p2, pData); REGISTER_TRACE(pOp->p3, pKey); | | | 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 | assert( pC!=0 ); assert( pC->pCursor!=0 || pC->pseudoTable ); assert( pKey->flags & MEM_Int ); assert( pC->isTable ); REGISTER_TRACE(pOp->p2, pData); REGISTER_TRACE(pOp->p3, pKey); iKey = pKey->u.i; if( pOp->p5 & OPFLAG_NCHANGE ) p->nChange++; if( pOp->p5 & OPFLAG_LASTROWID ) db->lastRowid = pKey->u.i; if( pData->flags & MEM_Null ){ pData->z = 0; pData->n = 0; }else{ assert( pData->flags & (MEM_Blob|MEM_Str) ); |
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3991 3992 3993 3994 3995 3996 3997 | assert( pC!=0 ); if( pC->nullRow ){ /* Do nothing so that reg[P2] remains NULL */ break; }else if( pC->deferredMoveto ){ v = pC->movetoTarget; }else if( pC->pseudoTable ){ | | < | 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 | assert( pC!=0 ); if( pC->nullRow ){ /* Do nothing so that reg[P2] remains NULL */ break; }else if( pC->deferredMoveto ){ v = pC->movetoTarget; }else if( pC->pseudoTable ){ v = pC->iKey; #ifndef SQLITE_OMIT_VIRTUALTABLE }else if( pC->pVtabCursor ){ pVtab = pC->pVtabCursor->pVtab; pModule = pVtab->pModule; assert( pModule->xRowid ); if( sqlite3SafetyOff(db) ) goto abort_due_to_misuse; rc = pModule->xRowid(pC->pVtabCursor, &v); sqlite3DbFree(db, p->zErrMsg); p->zErrMsg = pVtab->zErrMsg; pVtab->zErrMsg = 0; if( sqlite3SafetyOn(db) ) goto abort_due_to_misuse; #endif /* SQLITE_OMIT_VIRTUALTABLE */ }else{ rc = sqlite3VdbeCursorMoveto(pC); if( rc ) goto abort_due_to_error; if( pC->rowidIsValid ){ v = pC->lastRowid; }else{ assert( pC->pCursor!=0 ); sqlite3BtreeKeySize(pC->pCursor, &v); } } pOut->u.i = v; MemSetTypeFlag(pOut, MEM_Int); break; } |
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Changes to src/vdbeInt.h.
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11 12 13 14 15 16 17 | ************************************************************************* ** This is the header file for information that is private to the ** VDBE. This information used to all be at the top of the single ** source code file "vdbe.c". When that file became too big (over ** 6000 lines long) it was split up into several smaller files and ** this header information was factored out. ** | | < < < < < < < < | 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | ************************************************************************* ** This is the header file for information that is private to the ** VDBE. This information used to all be at the top of the single ** source code file "vdbe.c". When that file became too big (over ** 6000 lines long) it was split up into several smaller files and ** this header information was factored out. ** ** $Id: vdbeInt.h,v 1.173 2009/06/22 00:55:31 drh Exp $ */ #ifndef _VDBEINT_H_ #define _VDBEINT_H_ /* ** SQL is translated into a sequence of instructions to be ** executed by a virtual machine. Each instruction is an instance ** of the following structure. */ typedef struct VdbeOp Op; |
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Changes to src/vdbeaux.c.
︙ | ︙ | |||
10 11 12 13 14 15 16 | ** ************************************************************************* ** This file contains code used for creating, destroying, and populating ** a VDBE (or an "sqlite3_stmt" as it is known to the outside world.) Prior ** to version 2.8.7, all this code was combined into the vdbe.c source file. ** But that file was getting too big so this subroutines were split out. ** | | | 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | ** ************************************************************************* ** This file contains code used for creating, destroying, and populating ** a VDBE (or an "sqlite3_stmt" as it is known to the outside world.) Prior ** to version 2.8.7, all this code was combined into the vdbe.c source file. ** But that file was getting too big so this subroutines were split out. ** ** $Id: vdbeaux.c,v 1.462 2009/06/22 00:55:31 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* |
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2023 2024 2025 2026 2027 2028 2029 | int res, rc; #ifdef SQLITE_TEST extern int sqlite3_search_count; #endif assert( p->isTable ); rc = sqlite3BtreeMovetoUnpacked(p->pCursor, 0, p->movetoTarget, 0, &res); if( rc ) return rc; | | | 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 | int res, rc; #ifdef SQLITE_TEST extern int sqlite3_search_count; #endif assert( p->isTable ); rc = sqlite3BtreeMovetoUnpacked(p->pCursor, 0, p->movetoTarget, 0, &res); if( rc ) return rc; p->lastRowid = p->movetoTarget; p->rowidIsValid = ALWAYS(res==0) ?1:0; if( NEVER(res<0) ){ rc = sqlite3BtreeNext(p->pCursor, &res); if( rc ) return rc; } #ifdef SQLITE_TEST sqlite3_search_count++; |
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