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unlisten

NAME

UNLISTEN - stop listening for a notification

SYNOPSIS

 UNLISTEN { name | * }
 
 

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 name. The special wildcard * cancels all listener registrations for the current session.

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

PARAMETERS

name

Name of a notification (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.

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 commands 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 [listen(7)], NOTIFY [notify(7)]