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Overview
| Comment: | Further enhancements to IN-operator processing. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL 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 |
Context
|
2014-08-04
| ||
| 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: ee5f6eae user: drh tags: IN-operator-improvements | |
| 18:50 | Further enhancements to IN-operator processing. check-in: 7fdf26da user: drh tags: IN-operator-improvements | |
| 16:39 | Refinements to the enhanced IN-operator logic. check-in: 92ba2821 user: drh tags: IN-operator-improvements | |
Changes
Changes to src/expr.c.
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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
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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( 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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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
................................................................................
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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if( okOnePass ){
if( aToOpen[iDataCur-iBaseCur] ){
assert( pPk!=0 );
sqlite3VdbeAddOp4Int(v, OP_NotFound, iDataCur, labelBreak, regKey, nKey);
VdbeCoverageNeverTaken(v);
}
labelContinue = labelBreak;
sqlite3VdbeAddOp2(v, OP_IsNull, pPk ? regKey : 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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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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