CentOS 7.0 - man page for dblink_get_notify (centos section 3)

DBLINK_GET_NOTIFY(3)			    PostgreSQL 9.2.7 Documentation			 DBLINK_GET_NOTIFY(3)

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
       conname
	   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)

PostgreSQL 9.2.7				      2014-02-17				 DBLINK_GET_NOTIFY(3)