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)

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