Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
Comment: | Avoid calling sqlite3VdbeCursorMoveto() from more than one point in vdbe.c. Doing so prevents it from being inlined as part of OP_Column. |
---|---|
Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | onepass-delete |
Files: | files | file ages | folders |
SHA1: |
166d5af8914c6954fb24a06e9686f194 |
User & Date: | dan 2015-09-14 09:23:47.876 |
Context
2015-09-14
| ||
11:09 | Use a single-pass approach for DELETE statements on non-virtual tables that do not require trigger or foreign key processing. (check-in: 8b93cc5937 user: dan tags: trunk) | |
09:23 | Avoid calling sqlite3VdbeCursorMoveto() from more than one point in vdbe.c. Doing so prevents it from being inlined as part of OP_Column. (Closed-Leaf check-in: 166d5af891 user: dan tags: onepass-delete) | |
2015-09-12
| ||
19:50 | Fix compiler warnings in delete.c. (check-in: 0a4d285e18 user: dan tags: onepass-delete) | |
Changes
Changes to src/vdbe.c.
︙ | ︙ | |||
3964 3965 3966 3967 3968 3969 3970 | } /* Opcode: NotExists P1 P2 P3 * * ** Synopsis: intkey=r[P3] ** ** P1 is the index of a cursor open on an SQL table btree (with integer ** keys). P3 is an integer rowid. If P1 does not contain a record with | | > | | | 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 | } /* Opcode: NotExists P1 P2 P3 * * ** Synopsis: intkey=r[P3] ** ** P1 is the index of a cursor open on an SQL table btree (with integer ** keys). P3 is an integer rowid. If P1 does not contain a record with ** rowid P3 then jump immediately to P2. Or, if P2 is 0, raise an ** SQLITE_CORRUPT error. If P1 does contain a record with rowid P3 then ** leave the cursor pointing at that record and fall through to the next ** instruction. ** ** The OP_NotFound opcode performs the same operation on index btrees ** (with arbitrary multi-value keys). ** ** This opcode leaves the cursor in a state where it cannot be advanced ** in either direction. In other words, the Next and Prev opcodes will ** not work following this opcode. |
︙ | ︙ | |||
4004 4005 4006 4007 4008 4009 4010 | rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res); pC->movetoTarget = iKey; /* Used by OP_Delete */ pC->nullRow = 0; pC->cacheStatus = CACHE_STALE; pC->deferredMoveto = 0; VdbeBranchTaken(res!=0,2); pC->seekResult = res; | | > > > | 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 | rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res); pC->movetoTarget = iKey; /* Used by OP_Delete */ pC->nullRow = 0; pC->cacheStatus = CACHE_STALE; pC->deferredMoveto = 0; VdbeBranchTaken(res!=0,2); pC->seekResult = res; if( res!=0 ){ if( pOp->p2==0 && rc==SQLITE_OK ) rc = SQLITE_CORRUPT_BKPT; goto jump_to_p2; } break; } /* Opcode: Sequence P1 P2 * * * ** Synopsis: r[P2]=cursor[P1].ctr++ ** ** Find the next available sequence number for cursor P1. |
︙ | ︙ | |||
4298 4299 4300 4301 4302 4303 4304 4305 | case OP_Delete: { VdbeCursor *pC; assert( pOp->p1>=0 && pOp->p1<p->nCursor ); pC = p->apCsr[pOp->p1]; assert( pC!=0 ); assert( pC->pCursor!=0 ); /* Only valid for real tables, no pseudotables */ | > < < < | | 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 | case OP_Delete: { VdbeCursor *pC; assert( pOp->p1>=0 && pOp->p1<p->nCursor ); pC = p->apCsr[pOp->p1]; assert( pC!=0 ); assert( pC->pCursor!=0 ); /* Only valid for real tables, no pseudotables */ assert( pC->deferredMoveto==0 ); if( pOp->p5 && db->xUpdateCallback && pOp->p4.z && pC->isTable ){ sqlite3BtreeKeySize(pC->pCursor, &pC->movetoTarget); } #ifdef SQLITE_DEBUG /* The seek operation that positioned the cursor prior to OP_Delete will ** have also set the pC->movetoTarget field to the rowid of the row that ** is being deleted */ |
︙ | ︙ |
Changes to src/wherecode.c.
︙ | ︙ | |||
1065 1066 1067 1068 1069 1070 1071 | disableTerm(pLevel, pRangeEnd); if( omitTable ){ /* pIdx is a covering index. No need to access the main table. */ }else if( HasRowid(pIdx->pTable) ){ iRowidReg = ++pParse->nMem; sqlite3VdbeAddOp2(v, OP_IdxRowid, iIdxCur, iRowidReg); sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg); | > > > | > | 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 | disableTerm(pLevel, pRangeEnd); if( omitTable ){ /* pIdx is a covering index. No need to access the main table. */ }else if( HasRowid(pIdx->pTable) ){ iRowidReg = ++pParse->nMem; sqlite3VdbeAddOp2(v, OP_IdxRowid, iIdxCur, iRowidReg); sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg); if( pWInfo->okOnePass ){ sqlite3VdbeAddOp3(v, OP_NotExists, iCur, 0, iRowidReg); }else{ sqlite3VdbeAddOp2(v, OP_Seek, iCur, iRowidReg); /* Deferred seek */ } }else if( iCur!=iIdxCur ){ Index *pPk = sqlite3PrimaryKeyIndex(pIdx->pTable); iRowidReg = sqlite3GetTempRange(pParse, pPk->nKeyCol); for(j=0; j<pPk->nKeyCol; j++){ k = sqlite3ColumnOfIndex(pIdx, pPk->aiColumn[j]); sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, k, iRowidReg+j); } |
︙ | ︙ |