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RESET SESSION, plus related new DDL commands. Patch from Marko Kreen,

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reviewed by Neil Conway. This patch adds the following DDL command
variants: RESET SESSION, RESET TEMP, RESET PLANS, CLOSE ALL, and
DEALLOCATE ALL. RESET SESSION is intended for use by connection
pool software and the like, in order to reset a client session
to something close to its initial state.

Note that while most of these command variants can be executed
inside a transaction block (but are not transaction-aware!),
RESET SESSION cannot. While this is inconsistent, it is intended
to catch programmer mistakes: RESET SESSION in an open transaction
block is probably unintended.
This commit is contained in:
Neil Conway
2007-04-12 06:53:49 +00:00
parent e6e47f278d
commit d13e903bea
25 changed files with 479 additions and 38 deletions
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4
src/include/utils/plancache.h
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.4 2007/03/23 19:53:52 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.5 2007/04/12 06:53:48 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@@ -105,4 +105,6 @@ extern void ReleaseCachedPlan(CachedPlan *plan, bool useResOwner);
extern TupleDesc PlanCacheComputeResultDesc(List *stmt_list);
extern bool HaveCachedPlans(void);
extern void ResetPlanCache(void);
#endif /* PLANCACHE_H */