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)
Note: The following description applies only to Postgres-XC
dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.
This section is identical to the corresponding PostgreSQL reference manual.
Note: The following description applies only to PostgreSQL
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.
Note: The following description applies only to PostgreSQL
The name of a named connection to get notifications on.
Note: The following description applies only to PostgreSQL
Returns setof (notify_name text, be_pid int, extra text), or an empty set if none.
Note: The following description applies only to PostgreSQL
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)