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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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11
src/backend/commands/portalcmds.c
View File

@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/portalcmds.c,v 1.62 2007/03/13 00:33:39 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/portalcmds.c,v 1.63 2007/04/12 06:53:46 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@ -236,11 +236,18 @@ PerformPortalClose(const char *name)
{
Portal portal;
/* NULL means CLOSE ALL */
if (name == NULL)
{
PortalHashTableDeleteAll();
return;
}
/*
* Disallow empty-string cursor name (conflicts with protocol-level
* unnamed portal).
*/
if (!name || name[0] == '\0')
if (name[0] == '\0')
ereport(ERROR,
(errcode(ERRCODE_INVALID_CURSOR_NAME),
errmsg("invalid cursor name: must not be empty")));