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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
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)