UNLISTEN(7)

1UNLISTEN(7)              PostgreSQL 11.3 Documentation             UNLISTEN(7)
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NAME

6       UNLISTEN - stop listening for a notification
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SYNOPSIS

9       UNLISTEN { channel | * }
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DESCRIPTION

12       UNLISTEN is used to remove an existing registration for NOTIFY events.
13       UNLISTEN cancels any existing registration of the current PostgreSQL
14       session as a listener on the notification channel named channel. The
15       special wildcard * cancels all listener registrations for the current
16       session.
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18       NOTIFY(7) contains a more extensive discussion of the use of LISTEN and
19       NOTIFY.
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PARAMETERS

22       channel
23           Name of a notification channel (any identifier).
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25       *
26           All current listen registrations for this session are cleared.
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NOTES

29       You can unlisten something you were not listening for; no warning or
30       error will appear.
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32       At the end of each session, UNLISTEN * is automatically executed.
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34       A transaction that has executed UNLISTEN cannot be prepared for
35       two-phase commit.
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EXAMPLES

38       To make a registration:
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40           LISTEN virtual;
41           NOTIFY virtual;
42           Asynchronous notification "virtual" received from server process with PID 8448.
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44       Once UNLISTEN has been executed, further NOTIFY messages will be
45       ignored:
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47           UNLISTEN virtual;
48           NOTIFY virtual;
49           -- no NOTIFY event is received
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COMPATIBILITY

52       There is no UNLISTEN command in the SQL standard.
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