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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2000-02-27 19:45:44 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2000-02-27 19:45:44 +0000 |
| commit | 84ccfdf0879150e1349f6933a348976e5d423499 (patch) | |
| tree | 067bd440073febab922bfad72ce3485593c48056 /src/backend/optimizer/prep/prepqual.c | |
| parent | 8b33278450ae6aa354b0160df34bf5fb9e878889 (diff) | |
| download | postgresql-84ccfdf0879150e1349f6933a348976e5d423499.tar.gz | |
Avoid a little bit of unnecessary computation in canonicalize_qual.
Diffstat (limited to 'src/backend/optimizer/prep/prepqual.c')
| -rw-r--r-- | src/backend/optimizer/prep/prepqual.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/backend/optimizer/prep/prepqual.c b/src/backend/optimizer/prep/prepqual.c index 7538d858d9..5f92c545cc 100644 --- a/src/backend/optimizer/prep/prepqual.c +++ b/src/backend/optimizer/prep/prepqual.c @@ -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; /* |