GNU/Linux man pages
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Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.4 |
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unlisten(7) |
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UNLISTEN − stop listening for a notification
UNLISTEN { name | * }
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.
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name |
Name of a notification (any identifier). | ||
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* |
All current listen registrations for this session are cleared. |
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.
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
There is no UNLISTEN command in the SQL standard.
LISTEN [listen(7)], NOTIFY [notify(l)]
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unlisten(7) | |