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d13e903bea
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.
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* async.h
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* Asynchronous notification: NOTIFY, LISTEN, UNLISTEN
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*
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* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/commands/async.h,v 1.35 2007/04/12 06:53:48 neilc Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef ASYNC_H
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#define ASYNC_H
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extern bool Trace_notify;
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/* notify-related SQL statements */
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extern void Async_Notify(const char *relname);
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extern void Async_Listen(const char *relname);
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extern void Async_Unlisten(const char *relname);
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extern void Async_UnlistenAll(void);
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/* perform (or cancel) outbound notify processing at transaction commit */
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extern void AtCommit_Notify(void);
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extern void AtAbort_Notify(void);
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extern void AtSubStart_Notify(void);
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extern void AtSubCommit_Notify(void);
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extern void AtSubAbort_Notify(void);
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extern void AtPrepare_Notify(void);
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/* signal handler for inbound notifies (SIGUSR2) */
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extern void NotifyInterruptHandler(SIGNAL_ARGS);
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/*
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* enable/disable processing of inbound notifies directly from signal handler.
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* The enable routine first performs processing of any inbound notifies that
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* have occurred since the last disable.
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*/
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extern void EnableNotifyInterrupt(void);
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extern bool DisableNotifyInterrupt(void);
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extern void notify_twophase_postcommit(TransactionId xid, uint16 info,
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void *recdata, uint32 len);
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#endif /* ASYNC_H */
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