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

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

View File

@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/async.h,v 1.34 2007/01/05 22:19:53 momjian Exp $
* $PostgreSQL: pgsql/src/include/commands/async.h,v 1.35 2007/04/12 06:53:48 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@@ -19,6 +19,7 @@ extern bool Trace_notify;
extern void Async_Notify(const char *relname);
extern void Async_Listen(const char *relname);
extern void Async_Unlisten(const char *relname);
extern void Async_UnlistenAll(void);
/* perform (or cancel) outbound notify processing at transaction commit */
extern void AtCommit_Notify(void);

View File

@@ -6,7 +6,7 @@
*
* Copyright (c) 2002-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.25 2007/03/13 00:33:43 tgl Exp $
* $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.26 2007/04/12 06:53:48 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@@ -59,4 +59,6 @@ extern void DropPreparedStatement(const char *stmt_name, bool showError);
extern TupleDesc FetchPreparedStatementResultDesc(PreparedStatement *stmt);
extern List *FetchPreparedStatementTargetList(PreparedStatement *stmt);
void DropAllPreparedStatements(void);
#endif /* PREPARE_H */