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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 21:58:18 +00:00
parent 3c6dc48ce4
commit 9b69647824
4 changed files with 16 additions and 5 deletions
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3
src/backend/nodes/outfuncs.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.360.2.1 2009/10/06 00:55:34 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.360.2.2 2010/03/30 21:58:18 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -1498,6 +1498,7 @@ _outPlannerInfo(StringInfo str, PlannerInfo *node)
WRITE_NODE_FIELD(sort_pathkeys);
WRITE_FLOAT_FIELD(total_table_pages, "%.0f");
WRITE_FLOAT_FIELD(tuple_fraction, "%.4f");
WRITE_BOOL_FIELD(hasInheritedTarget);
WRITE_BOOL_FIELD(hasJoinRTEs);
WRITE_BOOL_FIELD(hasHavingQual);
WRITE_BOOL_FIELD(hasPseudoConstantQuals);

4
src/backend/optimizer/plan/planner.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.256 2009/06/11 14:48:59 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.256.2.1 2010/03/30 21:58:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -287,6 +287,7 @@ subquery_planner(PlannerGlobal *glob, Query *parse,
root->cte_plan_ids = NIL;
root->eq_classes = NIL;
root->append_rel_list = NIL;
root->hasInheritedTarget = false;
root->hasRecursion = hasRecursion;
if (hasRecursion)
@ -663,6 +664,7 @@ inheritance_planner(PlannerInfo *root)
appinfo);
subroot.returningLists = NIL;
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 1.158 2009/06/11 14:48:59 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.158.2.1 2010/03/30 21:58:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -576,7 +576,10 @@ 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;
/*

7
src/include/nodes/relation.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.173 2009/06/11 14:49:11 momjian Exp $
* $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.173.2.1 2010/03/30 21:58:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -192,6 +192,11 @@ typedef struct PlannerInfo
/* These fields are used only when hasRecursion is true: */
int wt_param_id; /* PARAM_EXEC ID for the work table */
struct Plan *non_recursive_plan; /* plan for non-recursive term */
/* Added at end to minimize ABI breakage in 8.4 branch: */
bool hasInheritedTarget; /* true if parse->resultRelation is an
* inheritance child rel */
} PlannerInfo;