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Fix the Bloom-filter optimization so that it does not use IS NULL or

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IS NOT NULL constraints from the WHERE clause when operating on a LEFT JOIN.
[forum:/forumpost/031e262a89b6a9d2|Forum thread 031e262a89b6a9d2].

FossilOrigin-Name: 1a6328f2a5b4973094e5f85787145d652119822c86ec01a61f3f985c9d2903f2
This commit is contained in:
drh
2022-03-25 01:23:37 +00:00
parent 5705b41fb8
commit be341502db
4 changed files with 53 additions and 10 deletions
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13
src/where.c
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@@ -2596,8 +2596,17 @@ static void whereLoopOutputAdjust(
/* If there are extra terms in the WHERE clause not used by an index
** that depend only on the table being scanned, and that will tend to
** cause many rows to be omitted, then mark that table as
** "self-culling". */
pLoop->wsFlags |= WHERE_SELFCULL;
** "self-culling".
**
** 2022-03-24: Self-culling only applies if either the extra terms
** are straight comparison operators that are non-true with NULL
** operand, or if the loop is not a LEFT JOIN.
*/
if( (pTerm->eOperator & 0x3f)!=0
|| (pWC->pWInfo->pTabList->a[pLoop->iTab].fg.jointype & JT_LEFT)==0
){
pLoop->wsFlags |= WHERE_SELFCULL;
}
}
if( pTerm->truthProb<=0 ){
/* If a truth probability is specified using the likelihood() hints,