diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2001-10-18 16:11:42 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2001-10-18 16:11:42 +0000 |
| commit | 6254465d0621f724cdc9a1e99da24fa8a29f579d (patch) | |
| tree | 84bd08321ce84de9daf6ab5264c889e5b5a92e4e /src/backend/optimizer/path/pathkeys.c | |
| parent | 50450049581566ed47016cd89ba03b90be7ea1d0 (diff) | |
Extend code that deduces implied equality clauses to detect whether a
clause being added to a particular restriction-clause list is redundant
with those already in the list. This avoids useless work at runtime,
and (perhaps more importantly) keeps the selectivity estimation routines
from generating too-small estimates of numbers of output rows.
Also some minor improvements in OPTIMIZER_DEBUG displays.
Diffstat (limited to 'src/backend/optimizer/path/pathkeys.c')
| -rw-r--r-- | src/backend/optimizer/path/pathkeys.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/optimizer/path/pathkeys.c b/src/backend/optimizer/path/pathkeys.c index 4f4b6720e1e..9e964290e6d 100644 --- a/src/backend/optimizer/path/pathkeys.c +++ b/src/backend/optimizer/path/pathkeys.c @@ -11,7 +11,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/path/pathkeys.c,v 1.32 2001/03/22 06:16:14 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/path/pathkeys.c,v 1.33 2001/10/18 16:11:41 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -705,7 +705,7 @@ make_pathkeys_for_sortclauses(List *sortclauses, * This is a worthwhile savings because these routines will be invoked * many times when dealing with a many-relation query. */ -static void +void cache_mergeclause_pathkeys(Query *root, RestrictInfo *restrictinfo) { Node *key; |