Linux cli command UNLISTEN

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command UNLISTEN and provides detailed information about the command UNLISTEN, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the UNLISTEN.

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NAME 🖥️ UNLISTEN 🖥️

stop listening for a notification

SYNOPSIS

UNLISTEN { channel | * }

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

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

PARAMETERS

channel

Name of a notification channel (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.

A transaction that has executed UNLISTEN cannot be prepared for two-phase commit.

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 messages 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(7), NOTIFY(7)

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