diff options
Diffstat (limited to 'src/backend/optimizer/plan/initsplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/initsplan.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/src/backend/optimizer/plan/initsplan.c b/src/backend/optimizer/plan/initsplan.c index e43c52f6dfe..529ba712f41 100644 --- a/src/backend/optimizer/plan/initsplan.c +++ b/src/backend/optimizer/plan/initsplan.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.76 2002/11/19 23:21:58 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/initsplan.c,v 1.77 2002/11/24 21:52:14 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -577,15 +577,12 @@ distribute_qual_to_rels(Query *root, Node *clause, * the relid list. Set additional RestrictInfo fields for * joining. * - * We don't bother setting the merge/hashjoin info if we're not going - * to need it. We do want to know about mergejoinable ops in any - * potential equijoin clause (see later in this routine), and we - * ignore enable_mergejoin if isouterjoin is true, because - * mergejoin is the only implementation we have for full and right - * outer joins. + * We don't bother setting the hashjoin info if we're not going + * to need it. We do want to know about mergejoinable ops in all + * cases, however, because we use mergejoinable ops for other + * purposes such as detecting redundant clauses. */ - if (enable_mergejoin || isouterjoin || can_be_equijoin) - check_mergejoinable(restrictinfo); + check_mergejoinable(restrictinfo); if (enable_hashjoin) check_hashjoinable(restrictinfo); |