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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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5
src/backend/commands/async.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.135 2007/01/05 22:19:25 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.136 2007/04/12 06:53:46 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@ -127,7 +127,6 @@ static bool unlistenExitRegistered = false;
bool Trace_notify = false;
static void Async_UnlistenAll(void);
static void Async_UnlistenOnExit(int code, Datum arg);
static void ProcessIncomingNotify(void);
static void NotifyMyFrontEnd(char *relname, int32 listenerPID);
@ -335,7 +334,7 @@ Async_Unlisten(const char *relname)
*
*--------------------------------------------------------------
*/
static void
void
Async_UnlistenAll(void)
{
Relation lRel;