mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-21 04:43:23 +02:00
5a61590e48
Update UNLISTEN to not require double-quotes around the wildcard argument. Clean up markup.
152 lines
2.7 KiB
Plaintext
152 lines
2.7 KiB
Plaintext
<REFENTRY ID="SQL-UNLISTEN">
|
|
<REFMETA>
|
|
<REFENTRYTITLE>
|
|
UNLISTEN
|
|
</REFENTRYTITLE>
|
|
<REFMISCINFO>SQL - Language Statements</REFMISCINFO>
|
|
</REFMETA>
|
|
<REFNAMEDIV>
|
|
<REFNAME>
|
|
UNLISTEN
|
|
</REFNAME>
|
|
<REFPURPOSE>
|
|
Stop listening for notification on a notify condition
|
|
</REFPURPOSE>
|
|
|
|
<REFSYNOPSISDIV>
|
|
<REFSYNOPSISDIVINFO>
|
|
<DATE>1998-10-07</DATE>
|
|
</REFSYNOPSISDIVINFO>
|
|
<SYNOPSIS>
|
|
UNLISTEN { <REPLACEABLE CLASS="PARAMETER">notifyname</REPLACEABLE> | * }
|
|
</SYNOPSIS>
|
|
|
|
<REFSECT2 ID="R2-SQL-UNLISTEN-1">
|
|
<REFSECT2INFO>
|
|
<DATE>1998-10-07</DATE>
|
|
</REFSECT2INFO>
|
|
<TITLE>
|
|
Inputs
|
|
</TITLE>
|
|
<PARA>
|
|
</PARA>
|
|
<VARIABLELIST>
|
|
<VARLISTENTRY>
|
|
<TERM>
|
|
<REPLACEABLE CLASS="PARAMETER">notifyname</REPLACEABLE>
|
|
</TERM>
|
|
<LISTITEM>
|
|
<PARA>
|
|
Name of notify condition to stop listening to.
|
|
|
|
<VARLISTENTRY>
|
|
<TERM>
|
|
<literal>*</literal>
|
|
</TERM>
|
|
<LISTITEM>
|
|
<PARA>
|
|
All current listen registrations for this backend are cleared.
|
|
|
|
</VARIABLELIST>
|
|
|
|
</REFSECT2>
|
|
|
|
<REFSECT2 ID="R2-SQL-UNLISTEN-2">
|
|
<REFSECT2INFO>
|
|
<DATE>1998-10-07</DATE>
|
|
</REFSECT2INFO>
|
|
<TITLE>
|
|
Outputs
|
|
</TITLE>
|
|
<PARA>
|
|
|
|
<VARIABLELIST>
|
|
<VARLISTENTRY>
|
|
<TERM>
|
|
<replaceable>status</replaceable>
|
|
</TERM>
|
|
<LISTITEM>
|
|
<PARA>
|
|
<VARIABLELIST>
|
|
<VARLISTENTRY>
|
|
<TERM>
|
|
<returnvalue>UNLISTEN</returnvalue>
|
|
</TERM>
|
|
<LISTITEM>
|
|
<PARA>
|
|
Acknowledgement that statement has executed.
|
|
</PARA>
|
|
</LISTITEM>
|
|
</VARLISTENTRY>
|
|
</variablelist>
|
|
</LISTITEM>
|
|
</VARLISTENTRY>
|
|
</VARIABLELIST>
|
|
</REFSECT2>
|
|
</REFSYNOPSISDIV>
|
|
|
|
<REFSECT1 ID="R1-SQL-UNLISTEN-1">
|
|
<REFSECT1INFO>
|
|
<DATE>1998-10-07</DATE>
|
|
</REFSECT1INFO>
|
|
<TITLE>
|
|
Description
|
|
</TITLE>
|
|
<PARA>
|
|
UNLISTEN cancels any existing registration of the current
|
|
<productname>Postgres</productname> backend as a listener on the notify
|
|
condition <REPLACEABLE CLASS="PARAMETER">notifyname</REPLACEABLE>.
|
|
The special condition name "*" means to cancel all listener registrations
|
|
for the current backend.
|
|
|
|
<para>
|
|
The backend does not complain if you UNLISTEN something you were not
|
|
listening for.
|
|
|
|
<para>
|
|
Each backend will automatically execute <command>UNLISTEN "*"</command> when
|
|
exiting.
|
|
|
|
<para>
|
|
The reference page for <command>NOTIFY</command> contains a more extensive
|
|
discussion of the use of <command>LISTEN</command> and
|
|
<command>NOTIFY</command>.
|
|
|
|
<REFSECT1 ID="R1-SQL-UNLISTEN-2">
|
|
<TITLE>
|
|
Usage
|
|
</TITLE>
|
|
<PARA>
|
|
<ProgramListing>
|
|
postgres=> listen virtual;
|
|
LISTEN
|
|
postgres=> notify virtual;
|
|
NOTIFY
|
|
ASYNC NOTIFY of 'virtual' from backend pid '12317' received
|
|
postgres=> unlisten virtual;
|
|
UNLISTEN
|
|
postgres=> notify virtual;
|
|
NOTIFY
|
|
-- notice no NOTIFY event is received
|
|
postgres=>
|
|
</ProgramListing>
|
|
|
|
</REFSECT1>
|
|
|
|
<REFSECT1 ID="R1-SQL-UNLISTEN-3">
|
|
<TITLE>
|
|
Compatibility
|
|
</TITLE>
|
|
<PARA>
|
|
|
|
<REFSECT2 ID="R2-SQL-UNLISTEN-4">
|
|
<REFSECT2INFO>
|
|
<DATE>1998-10-07</DATE>
|
|
</REFSECT2INFO>
|
|
<TITLE>
|
|
SQL92
|
|
</TITLE>
|
|
<PARA>
|
|
There is no <command>UNLISTEN</command> in <acronym>SQL92</acronym>.
|
|
</REFENTRY>
|