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When checking for the WHERE-clause push-down optimization, verify that

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all terms of the compound inner SELECT are non-aggregate, not just the
last term.  Fix for ticket [f7f8c97e97597].

FossilOrigin-Name: ec215f94ac9748c0acd82af0cc9e7a92249462f9
This commit is contained in:
drh
2016-04-25 02:20:10 +00:00
parent 1de86ca17f
commit b1ec87afdb
4 changed files with 54 additions and 14 deletions
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14
src/select.c
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@@ -3785,14 +3785,18 @@ static int pushDownWhereTerms(
){
Expr *pNew;
int nChng = 0;
Select *pX; /* For looping over compound SELECTs in pSubq */
if( pWhere==0 ) return 0;
if( (pSubq->selFlags & (SF_Aggregate|SF_Recursive))!=0 ){
testcase( pSubq->selFlags & SF_Aggregate );
testcase( pSubq->selFlags & SF_Recursive );
return 0; /* restrictions (1) and (2) */
for(pX=pSubq; pX; pX=pX->pPrior){
if( (pX->selFlags & (SF_Aggregate|SF_Recursive))!=0 ){
testcase( pX->selFlags & SF_Aggregate );
testcase( pX->selFlags & SF_Recursive );
testcase( pX!=pSubq );
return 0; /* restrictions (1) and (2) */
}
}
if( pSubq->pLimit!=0 ){
return 0; /* restriction (3) */
return 0; /* restriction (3) */
}
while( pWhere->op==TK_AND ){
nChng += pushDownWhereTerms(db, pSubq, pWhere->pRight, iCursor);