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Code Issues Releases Wiki Activity

Avoid a little bit of unnecessary computation in canonicalize_qual.

This commit is contained in:
Tom Lane 2000-02-27 19:45:44 +00:00
parent 8b33278450
commit 84ccfdf087
1 changed files with 3 additions and 2 deletions
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5
src/backend/optimizer/prep/prepqual.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepqual.c,v 1.22 2000/01/28 03:22:36 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepqual.c,v 1.23 2000/02/27 19:45:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -139,7 +139,8 @@ canonicalize_qual(Expr *qual, bool removeAndFlag)
* and only one relation is mentioned, and DNF is no larger than
* the CNF representation. (Pretty shaky; can we improve on this?)
*/
if (dnfok && dnfnodes <= cnfnodes && or_clause((Node *) newqual) &&
if (cnfok && dnfok && dnfnodes <= cnfnodes &&
or_clause((Node *) newqual) &&
NumRelids((Node *) newqual) == 1)
cnfok = false;
/*