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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
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)
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.
The name of a named connection to get notifications on.
Returns setof (notify_name text, be_pid int, extra text), or an empty set if none.
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)