UNLISTEN(7)						  PostgreSQL 9.2.7 Documentation					       UNLISTEN(7)

NAME

       UNLISTEN - stop listening for a notification

SYNOPSIS

       UNLISTEN { channel | * }

DESCRIPTION

       UNLISTEN is used to remove an existing registration for NOTIFY events.  UNLISTEN cancels any existing registration of the current
       PostgreSQL session as a listener on the notification channel named channel. The special wildcard * cancels all listener registrations for
       the current session.

       NOTIFY(7) contains a more extensive discussion of the use of LISTEN and NOTIFY.

PARAMETERS

       channel
	   Name of a notification channel (any identifier).

       *
	   All current listen registrations for this session are cleared.

NOTES

       You can unlisten something you were not listening for; no warning or error will appear.

       At the end of each session, UNLISTEN * is automatically executed.

       A transaction that has executed UNLISTEN cannot be prepared for two-phase commit.

EXAMPLES

       To make a registration:

	   LISTEN virtual;
	   NOTIFY virtual;
	   Asynchronous notification "virtual" received from server process with PID 8448.

       Once UNLISTEN has been executed, further NOTIFY messages will be ignored:

	   UNLISTEN virtual;
	   NOTIFY virtual;
	   -- no NOTIFY event is received

COMPATIBILITY

       There is no UNLISTEN command in the SQL standard.

SEE ALSO

       LISTEN(7), NOTIFY(7)

PostgreSQL 9.2.7						    2014-02-17							       UNLISTEN(7)