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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/nodes/parsenodes.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/nodes/parsenodes.h,v 1.344 2007/04/02 03:49:41 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.345 2007/04/12 06:53:48 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1451,6 +1451,7 @@ typedef struct ClosePortalStmt
{
NodeTag type;
char *portalname; /* name of the portal (cursor) */
/* NULL means CLOSE ALL */
} ClosePortalStmt;
/* ----------------------
@@ -1981,6 +1982,7 @@ typedef struct DeallocateStmt
{
NodeTag type;
char *name; /* The name of the plan to remove */
/* NULL means DEALLOCATE ALL */
} DeallocateStmt;
/*