UNLISTEN(7) - phpMan

UNLISTEN(7) PostgreSQL 9.2.24 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.