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Cause planner to account for evaluation costs in targetlists and

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HAVING quals.  Normally this is an insignificant effect --- but it
will not be insignificant when these clauses contain sub-selects.
The added costs cannot affect the planning of the query containing
them, but they might have an impact when the query is a sub-query
of a larger one.
This commit is contained in:
Tom Lane
2003-01-13 00:29:26 +00:00
parent d1686b42ab
commit 8ac6d952cf
3 changed files with 79 additions and 6 deletions
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4
src/backend/optimizer/plan/subselect.c
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.64 2003/01/12 04:03:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.65 2003/01/13 00:29:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -378,6 +378,8 @@ make_subplan(SubLink *slink, List *lefthand)
plan->plan_width);
matplan->startup_cost = matpath.startup_cost;
matplan->total_cost = matpath.total_cost;
matplan->plan_rows = plan->plan_rows;
matplan->plan_width = plan->plan_width;
/* parameter kluge --- see comments above */
matplan->extParam = listCopy(plan->extParam);
matplan->locParam = listCopy(plan->locParam);