NAME

       UNLISTEN - stop listening for a notification

SYNOPSIS

       UNLISTEN { channel | * }

DESCRIPTION

           Note
           The following description applies only to Postgres-XC

       UNLISTEN statement works only locally to the issued node.

       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)