UNLISTEN

Section: SQL Commands ()
Updated: 2008-01-03
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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 may 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(l)]


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
NOTES
EXAMPLES
COMPATIBILITY
SEE ALSO

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