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Overview
Comment: | Further enhancements to IN-operator processing. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | IN-operator-improvements |
Files: | files | file ages | folders |
SHA1: |
7fdf26da1d2f40b80f9e44ff6f5af22a |
User & Date: | drh 2014-08-04 18:50:54.734 |
Context
2014-08-04
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21:26 | Part of the change in the previous check-in was incorrect and can result in an incorrect UPDATE for WITHOUT ROWID tables. This check-in fixes the problem. (check-in: ee5f6eae57 user: drh tags: IN-operator-improvements) | |
18:50 | Further enhancements to IN-operator processing. (check-in: 7fdf26da1d user: drh tags: IN-operator-improvements) | |
16:39 | Refinements to the enhanced IN-operator logic. (check-in: 92ba282146 user: drh tags: IN-operator-improvements) | |
Changes
Changes to src/expr.c.
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1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 | if( op==TK_REGISTER ) op = p->op2; switch( op ){ case TK_INTEGER: case TK_STRING: case TK_FLOAT: case TK_BLOB: return 0; default: return 1; } } /* ** Return TRUE if the given expression is a constant which would be | > > > | 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 | if( op==TK_REGISTER ) op = p->op2; switch( op ){ case TK_INTEGER: case TK_STRING: case TK_FLOAT: case TK_BLOB: return 0; case TK_COLUMN: assert( p->pTab!=0 ); return p->iColumn>=0 && p->pTab->aCol[p->iColumn].notNull==0; default: return 1; } } /* ** Return TRUE if the given expression is a constant which would be |
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2034 2035 2036 2037 2038 2039 2040 | sqlite3VdbeResolveLabel(v, labelOk); sqlite3ReleaseTempReg(pParse, regCkNull); }else{ /* If the LHS is NULL, then the result is either false or NULL depending ** on whether the RHS is empty or not, respectively. */ | > | | | | | | | | | | > | 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 | sqlite3VdbeResolveLabel(v, labelOk); sqlite3ReleaseTempReg(pParse, regCkNull); }else{ /* If the LHS is NULL, then the result is either false or NULL depending ** on whether the RHS is empty or not, respectively. */ if( sqlite3ExprCanBeNull(pExpr->pLeft) ){ if( destIfNull==destIfFalse ){ /* Shortcut for the common case where the false and NULL outcomes are ** the same. */ sqlite3VdbeAddOp2(v, OP_IsNull, r1, destIfNull); VdbeCoverage(v); }else{ int addr1 = sqlite3VdbeAddOp1(v, OP_NotNull, r1); VdbeCoverage(v); sqlite3VdbeAddOp2(v, OP_Rewind, pExpr->iTable, destIfFalse); VdbeCoverage(v); sqlite3VdbeAddOp2(v, OP_Goto, 0, destIfNull); sqlite3VdbeJumpHere(v, addr1); } } if( eType==IN_INDEX_ROWID ){ /* In this case, the RHS is the ROWID of table b-tree */ sqlite3VdbeAddOp2(v, OP_MustBeInt, r1, destIfFalse); VdbeCoverage(v); sqlite3VdbeAddOp3(v, OP_NotExists, pExpr->iTable, destIfFalse, r1); |
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Changes to src/update.c.
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433 434 435 436 437 438 439 | if( okOnePass ){ if( aToOpen[iDataCur-iBaseCur] ){ assert( pPk!=0 ); sqlite3VdbeAddOp4Int(v, OP_NotFound, iDataCur, labelBreak, regKey, nKey); VdbeCoverageNeverTaken(v); } labelContinue = labelBreak; | | | > | 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 | if( okOnePass ){ if( aToOpen[iDataCur-iBaseCur] ){ assert( pPk!=0 ); sqlite3VdbeAddOp4Int(v, OP_NotFound, iDataCur, labelBreak, regKey, nKey); VdbeCoverageNeverTaken(v); } labelContinue = labelBreak; if( pPk==0 ){ sqlite3VdbeAddOp2(v, OP_IsNull, regOldRowid, labelBreak); VdbeCoverage(v); } }else if( pPk ){ labelContinue = sqlite3VdbeMakeLabel(v); sqlite3VdbeAddOp2(v, OP_Rewind, iEph, labelBreak); VdbeCoverage(v); addrTop = sqlite3VdbeAddOp2(v, OP_RowKey, iEph, regKey); sqlite3VdbeAddOp4Int(v, OP_NotFound, iDataCur, labelContinue, regKey, 0); VdbeCoverage(v); }else{ |
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