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Do not attempt to use terms from the WHERE clause to drive indexes on the

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right table of a LEFT JOIN.  Fix for ticket [4ba5abf65c5b0f9a96a7a40cd18b]

FossilOrigin-Name: aeb694e3f787f1f8b55650c17f90c197eee3f7f9b890a88f458c33e43009a082
This commit is contained in:
drh
2018-04-24 17:34:03 +00:00
parent cd90ca7ded
commit c447595df5
5 changed files with 23 additions and 14 deletions
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2
src/select.c
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@@ -5543,7 +5543,7 @@ int sqlite3Select(
** a view or the co-routine to implement a view. The first instance
** is sufficient, though the subroutine to manifest the view does need
** to be invoked again. */
if( pItem->addrFillSub ){
if( NEVER(pItem->addrFillSub) ){
if( pItem->fg.viaCoroutine==0 ){
/* The subroutine that manifests the view might be a one-time routine,
** or it might need to be rerun on each iteration because it

5
src/where.c
View File

@@ -2420,15 +2420,12 @@ static int whereLoopAddBtreeIndex(
** to mix with a lower range bound from some other source */
if( pTerm->wtFlags & TERM_LIKEOPT && pTerm->eOperator==WO_LT ) continue;
/* Do not allow IS constraints from the WHERE clause to be used by the
/* Do not allow constraints from the WHERE clause to be used by the
** right table of a LEFT JOIN. Only constraints in the ON clause are
** allowed */
if( (pSrc->fg.jointype & JT_LEFT)!=0
&& !ExprHasProperty(pTerm->pExpr, EP_FromJoin)
&& (eOp & (WO_IS|WO_ISNULL))!=0
){
testcase( eOp & WO_IS );
testcase( eOp & WO_ISNULL );
continue;
}