'\" t
.\"     Title: dblink_get_notify
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 2024
.\"    Manual: PostgreSQL 16.2 Documentation
.\"    Source: PostgreSQL 16.2
.\"  Language: English
.\"
.TH "DBLINK_GET_NOTIFY" "3" "2024" "PostgreSQL 16.2" "PostgreSQL 16.2 Documentation"
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.SH "NAME"
dblink_get_notify \- retrieve async notifications on a connection
.SH "SYNOPSIS"
.sp
.nf
dblink_get_notify() returns setof (notify_name text, be_pid int, extra text)
dblink_get_notify(text connname) returns setof (notify_name text, be_pid int, extra text)
.fi
.SH "DESCRIPTION"
.PP
\fBdblink_get_notify\fR
retrieves notifications on either the unnamed connection, or on a named connection if specified\&. To receive notifications via dblink,
\fBLISTEN\fR
must first be issued, using
\fBdblink_exec\fR\&. For details see
\fBLISTEN\fR(7)
and
\fBNOTIFY\fR(7)\&.
.SH "ARGUMENTS"
.PP
\fIconnname\fR
.RS 4
The name of a named connection to get notifications on\&.
.RE
.SH "RETURN VALUE"
.PP
Returns
setof (notify_name text, be_pid int, extra text), or an empty set if none\&.
.SH "EXAMPLES"
.sp
.if n \{\
.RS 4
.\}
.nf
SELECT dblink_exec(\*(AqLISTEN virtual\*(Aq);
 dblink_exec
\-\-\-\-\-\-\-\-\-\-\-\-\-
 LISTEN
(1 row)

SELECT * FROM dblink_get_notify();
 notify_name | be_pid | extra
\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-
(0 rows)

NOTIFY virtual;
NOTIFY

SELECT * FROM dblink_get_notify();
 notify_name | be_pid | extra
\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-
 virtual     |   1229 |
(1 row)
.fi
.if n \{\
.RE
.\}