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Refinements to the enhanced IN-operator logic.

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FossilOrigin-Name: 92ba2821468ecbfac2469161d81c873de67b2243
This commit is contained in:
drh
2014-08-04 16:39:39 +00:00
parent bb53ecb1db
commit a976979b6e
3 changed files with 10 additions and 14 deletions
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7
src/expr.c
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@@ -2006,14 +2006,13 @@ static void sqlite3ExprCodeIN(
int regCkNull = 0;
int ii;
assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
sqlite3VdbeAddOp2(v, OP_IsNull, r1, destIfNull); VdbeCoverage(v);
if( destIfNull!=destIfFalse ){
regCkNull = sqlite3GetTempReg(pParse);
sqlite3VdbeAddOp2(v, OP_Integer, 0, regCkNull);
sqlite3VdbeAddOp3(v, OP_BitAnd, r1, r1, regCkNull);
}
for(ii=0; ii<pList->nExpr; ii++){
r2 = sqlite3ExprCodeTemp(pParse, pList->a[ii].pExpr, &regToFree);
if( regCkNull ){
if( regCkNull && sqlite3ExprCanBeNull(pList->a[ii].pExpr) ){
sqlite3VdbeAddOp3(v, OP_BitAnd, regCkNull, r2, regCkNull);
}
if( ii<pList->nExpr-1 || destIfNull!=destIfFalse ){
@@ -2722,7 +2721,7 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
addr = sqlite3VdbeAddOp1(v, op, r1);
VdbeCoverageIf(v, op==TK_ISNULL);
VdbeCoverageIf(v, op==TK_NOTNULL);
sqlite3VdbeAddOp2(v, OP_AddImm, target, -1);
sqlite3VdbeAddOp2(v, OP_Integer, 0, target);
sqlite3VdbeJumpHere(v, addr);
break;
}