dblink_get_notify
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 and NOTIFY.
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)