UNLISTEN(l) SQL - Language Statements (2002-11-22) UNLISTEN(l) NAME UNLISTEN - stop listening for a notification SYNOPSIS UNLISTEN { notifyname | * } INPUTS notifyname Name of previously registered notify condition. * All current listen registrations for this backend are cleared. OUTPUTS UNLISTEN Acknowledgment that statement has executed. DESCRIPTION UNLISTEN is used to remove an existing NOTIFY registration. UNLISTEN cancels any existing registration of the current PostgreSQL session as a listener on the notify condition notifyname. The special condition wildcard * cancels all listener registrations for the current session. NOTIFY [notify(l)] contains a more extensive discussion of the use of LISTEN and NOTIFY. NOTES notifyname need not be a valid class name but can be any string valid as a name up to 64 characters long. The backend does not complain if you unlisten something you were not listening for. Each backend will automatically execute UNLISTEN * when exiting. USAGE To subscribe to an existing registration: LISTEN virtual; LISTEN NOTIFY virtual; NOTIFY Asynchronous NOTIFY 'virtual' from backend with pid '8448' received Once UNLISTEN has been executed, further NOTIFY commands will be ignored: UNLISTEN virtual; UNLISTEN Page 1 (printed 3/24/03) UNLISTEN(l) SQL - Language Statements (2002-11-22) UNLISTEN(l) NOTIFY virtual; NOTIFY -- notice no NOTIFY event is received COMPATIBILITY SQL92 There is no UNLISTEN in SQL92. Page 2 (printed 3/24/03)[top]
Vote for polarhome |