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Fix the plan-invalidation mechanism to treat regclass constants that refer to

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a relation as a reason to invalidate a plan when the relation changes.  This
handles scenarios such as dropping/recreating a sequence that is referenced by
nextval('seq') in a cached plan.  Rather than teach plancache.c all about
digging through plan trees to find regclass Consts, we charge the planner's
setrefs.c with making a list of the relation OIDs on which each plan depends.
That way the list can be built cheaply during a plan tree traversal that has
to happen anyway.  Per bug #3662 and subsequent discussion.
This commit is contained in:
Tom Lane
2007-10-11 18:05:27 +00:00
parent 68b08b2512
commit 82d8ab6fc4
10 changed files with 223 additions and 101 deletions
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5
src/include/optimizer/planmain.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/planmain.h,v 1.102 2007/10/04 20:44:47 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/planmain.h,v 1.103 2007/10/11 18:05:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -96,7 +96,8 @@ extern RestrictInfo *build_implied_join_equality(Oid opno,
extern Plan *set_plan_references(PlannerGlobal *glob,
Plan *plan,
List *rtable);
extern List *set_returning_clause_references(List *rlist,
extern List *set_returning_clause_references(PlannerGlobal *glob,
List *rlist,
Plan *topplan,
Index resultRelation);
extern void fix_opfuncids(Node *node);