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Avoid unnecessary WHERE clause term tests when coding a join where one

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of the tables contains a OR constraint.

FossilOrigin-Name: ab94603974a0ad5342e5aee27603162652e70492
This commit is contained in:
drh
2016-01-29 16:57:06 +00:00
parent 98a4d5a7fa
commit 3b83f0cd8f
3 changed files with 11 additions and 9 deletions
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4
src/wherecode.c
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@@ -1401,7 +1401,9 @@ Bitmask sqlite3WhereCodeOneLoopStart(
Expr *pExpr = pWC->a[iTerm].pExpr;
if( &pWC->a[iTerm] == pTerm ) continue;
if( ExprHasProperty(pExpr, EP_FromJoin) ) continue;
if( (pWC->a[iTerm].wtFlags & TERM_VIRTUAL)!=0 ) continue;
testcase( pWC->a[iTerm].wtFlags & TERM_VIRTUAL );
testcase( pWC->a[iTerm].wtFlags & TERM_CODED );
if( (pWC->a[iTerm].wtFlags & (TERM_VIRTUAL|TERM_CODED))!=0 ) continue;
if( (pWC->a[iTerm].eOperator & WO_ALL)==0 ) continue;
testcase( pWC->a[iTerm].wtFlags & TERM_ORINFO );
pExpr = sqlite3ExprDup(db, pExpr, 0);