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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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4
src/backend/optimizer/util/pathnode.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.138 2007/02/06 02:59:12 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/pathnode.c,v 1.139 2007/04/21 21:01:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -800,7 +800,7 @@ create_unique_path(PlannerInfo *root, RelOptInfo *rel, Path *subpath)
*/
if (sub_targetlist && rel->rtekind == RTE_SUBQUERY)
{
RangeTblEntry *rte = rt_fetch(rel->relid, root->parse->rtable);
RangeTblEntry *rte = planner_rt_fetch(rel->relid, root);
List *sub_tlist_colnos;
sub_tlist_colnos = translate_sub_tlist(sub_targetlist, rel->relid);