dblink_get_notify (3) - Linux Manuals

dblink_get_notify: retrieve async notifications on a connection

NAME

dblink_get_notify - retrieve async notifications on a connection

SYNOPSIS

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)

DESCRIPTION

dblink_get_notify retrieves notifications on either the unnamed connection, or on a named connection if specified. To receive notifications via dblink, LISTEN must first be issued, using dblink_exec. For details see LISTEN(7) and NOTIFY(7).

ARGUMENTS

connname

The name of a named connection to get notifications on.

RETURN VALUE

Returns setof (notify_name text, be_pid int, extra text), or an empty set if none.

EXAMPLES

SELECT dblink_exec('LISTEN virtual');
 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)