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DBLINK_GET_NOTIFY(3) PostgreSQL 11.22 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

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)
2023 PostgreSQL 11.22