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Some further performance tweaks for planning large inheritance trees that

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are mostly excluded by constraints: do the CE test a bit earlier to save
some adjust_appendrel_attrs() work on excluded children, and arrange to
use array indexing rather than rt_fetch() to fetch RTEs in the main body
of the planner.  The latter is something I'd wanted to do for awhile anyway,
but seeing list_nth_cell() as 35% of the runtime gets one's attention.
This commit is contained in:
Tom Lane
2007-04-21 21:01:45 +00:00
parent ac7e6c0665
commit afcf09dd90
11 changed files with 91 additions and 42 deletions
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6
src/backend/optimizer/plan/createplan.c
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@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.228 2007/04/06 22:33:42 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.229 2007/04/21 21:01:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1353,7 +1353,7 @@ create_functionscan_plan(PlannerInfo *root, Path *best_path,
/* it should be a function base rel... */
Assert(scan_relid > 0);
rte = rt_fetch(scan_relid, root->parse->rtable);
rte = planner_rt_fetch(scan_relid, root);
Assert(rte->rtekind == RTE_FUNCTION);
/* Sort clauses into best execution order */
@@ -1388,7 +1388,7 @@ create_valuesscan_plan(PlannerInfo *root, Path *best_path,
/* it should be a values base rel... */
Assert(scan_relid > 0);
rte = rt_fetch(scan_relid, root->parse->rtable);
rte = planner_rt_fetch(scan_relid, root);
Assert(rte->rtekind == RTE_VALUES);
/* Sort clauses into best execution order */