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Avoid an unnecessary OP_Move operation for expression subqueries.

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FossilOrigin-Name: 462f42af52f146fd328ddcbbe78c8444ef7bd2c3
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drh
2014-08-29 12:29:39 +00:00
parent ae914d783a
commit 53932ce8fa
4 changed files with 10 additions and 9 deletions
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src/expr.c
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@@ -1912,6 +1912,7 @@ int sqlite3CodeSubselect(
sqlite3SelectDestInit(&dest, 0, ++pParse->nMem);
if( pExpr->op==TK_SELECT ){
dest.eDest = SRT_Mem;
dest.iSdst = dest.iSDParm;
sqlite3VdbeAddOp2(v, OP_Null, 0, dest.iSDParm);
VdbeComment((v, "Init subquery result"));
}else{