diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-22 20:00:40 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-22 20:00:40 +0000 |
| commit | 4f06c688c7b4726ac9f5279d4a9f32408eec5356 (patch) | |
| tree | 6bf75e7cdf88035988d4bf414e56889ea00d87b1 /src/include/utils/selfuncs.h | |
| parent | 45e07369383ff1631dea76cae6d222c2f16ad70e (diff) | |
Put back planner's ability to cache the results of mergejoinscansel(),
which I had removed in the first cut of the EquivalenceClass rewrite to
simplify that patch a little. But it's still important --- in a four-way
join problem mergejoinscansel() was eating about 40% of the planning time
according to gprof. Also, improve the EquivalenceClass code to re-use
join RestrictInfos rather than generating fresh ones for each join
considered. This saves some memory space but more importantly improves
the effectiveness of caching planning info in RestrictInfos.
Diffstat (limited to 'src/include/utils/selfuncs.h')
| -rw-r--r-- | src/include/utils/selfuncs.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/include/utils/selfuncs.h b/src/include/utils/selfuncs.h index 84549ca1d32..f0c6f20427c 100644 --- a/src/include/utils/selfuncs.h +++ b/src/include/utils/selfuncs.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.38 2007/01/05 22:19:59 momjian Exp $ + * $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.39 2007/01/22 20:00:40 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -160,7 +160,7 @@ extern Selectivity rowcomparesel(PlannerInfo *root, int varRelid, JoinType jointype); extern void mergejoinscansel(PlannerInfo *root, Node *clause, - Oid opfamily, int strategy, + Oid opfamily, int strategy, bool nulls_first, Selectivity *leftscan, Selectivity *rightscan); |