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Fix caching of foreign-key-checking queries so that when a replan is needed,

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we regenerate the SQL query text not merely the plan derived from it.  This
is needed to handle contingencies such as renaming of a table or column
used in an FK.  Pre-8.3, such cases worked despite the lack of replanning
(because the cached plan needn't actually change), so this is a regression.
Per bug #4417 from Benjamin Bihler.
This commit is contained in:
Tom Lane
2008-09-15 23:37:40 +00:00
parent 448950b37b
commit 1cd935609f
5 changed files with 103 additions and 7 deletions
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3
src/include/utils/plancache.h
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.13 2008/09/09 18:58:09 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.14 2008/09/15 23:37:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -109,6 +109,7 @@ extern void DropCachedPlan(CachedPlanSource *plansource);
extern CachedPlan *RevalidateCachedPlan(CachedPlanSource *plansource,
bool useResOwner);
extern void ReleaseCachedPlan(CachedPlan *plan, bool useResOwner);
extern bool CachedPlanIsValid(CachedPlanSource *plansource);
extern TupleDesc PlanCacheComputeResultDesc(List *stmt_list);
extern void ResetPlanCache(void);