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Fix "constraint_exclusion = partition" logic so that it will also attempt

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constraint exclusion on an inheritance set that is the target of an UPDATE
or DELETE query.  Per gripe from Marc Cousin.  Back-patch to 8.4 where
the feature was introduced.
This commit is contained in:
Tom Lane
2010-03-30 21:58:11 +00:00
parent 2a77355ea1
commit d174a4adbb
4 changed files with 13 additions and 5 deletions
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4
src/backend/optimizer/plan/planner.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.266 2010/02/26 02:00:45 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.267 2010/03/30 21:58:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -307,6 +307,7 @@ subquery_planner(PlannerGlobal *glob, Query *parse,
root->eq_classes = NIL;
root->append_rel_list = NIL;
root->rowMarks = NIL;
root->hasInheritedTarget = false;
root->hasRecursion = hasRecursion;
if (hasRecursion)
@ -749,6 +750,7 @@ inheritance_planner(PlannerInfo *root)
adjust_appendrel_attrs((Node *) parse,
appinfo);
subroot.init_plans = NIL;
subroot.hasInheritedTarget = true;
/* We needn't modify the child's append_rel_list */
/* There shouldn't be any OJ info to translate, as yet */
Assert(subroot.join_info_list == NIL);

7
src/backend/optimizer/util/plancat.c
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.162 2010/01/05 21:53:58 rhaas Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.163 2010/03/30 21:58:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -580,7 +580,10 @@ relation_excluded_by_constraints(PlannerInfo *root,
/* Skip the test if constraint exclusion is disabled for the rel */
if (constraint_exclusion == CONSTRAINT_EXCLUSION_OFF ||
(constraint_exclusion == CONSTRAINT_EXCLUSION_PARTITION &&
rel->reloptkind != RELOPT_OTHER_MEMBER_REL))
!(rel->reloptkind == RELOPT_OTHER_MEMBER_REL ||
(root->hasInheritedTarget &&
rel->reloptkind == RELOPT_BASEREL &&
rel->relid == root->parse->resultRelation))))
return false;
/*