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Implement dblink_get_notify().

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Adds the ability to retrieve async notifications using dblink,
via the addition of the function dblink_get_notify(). Original patch
by Marcus Kempe, suggestions by Tom Lane and Alvaro Herrera, patch
review and adjustments by Joe Conway.
This commit is contained in:
Joe Conway
2009-08-05 16:11:07 +00:00
parent 16f3cf8c0c
commit f4095b4c4b
7 changed files with 253 additions and 5 deletions
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17
contrib/dblink/sql/dblink.sql
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@ -389,3 +389,20 @@ DROP USER dblink_regression_test;
DROP USER MAPPING FOR public SERVER fdtest;
DROP SERVER fdtest;
DROP FOREIGN DATA WRAPPER postgresql;
-- test asynchronous notifications
SELECT dblink_connect('dbname=contrib_regression');
--should return listen
SELECT dblink_exec('LISTEN regression');
--should return listen
SELECT dblink_exec('LISTEN foobar');
SELECT dblink_exec('NOTIFY regression');
SELECT dblink_exec('NOTIFY foobar');
SELECT notify_name, be_pid = (select t.be_pid from dblink('select pg_backend_pid()') as t(be_pid int)) AS is_self_notify, extra from dblink_get_notify();
SELECT * from dblink_get_notify();
SELECT dblink_disconnect();