Merlin Moncure wrote:
On Mon, Apr 30, 2012 at 1:47 AM, Alexander Reichstadt <lxr@xxxxxxx> wrote:Hi, From the documentation I was able to build a trigger firing upon deletion of a record a function that delivers tablename_operation as a notification one needs to subscribe to. So in terminal I can say LISTEN persons_delete and instantly will receive Asynchronous notification "persons_delete" received from server process with PID 54790. if there was a delete. But what I don't fully understand is how to do this with PQnotifies. Following the docu I get no notifications even though I subscribe to them after successfully connecting to the server the same way I do using terminal. Googling didn't give me examples I was able to use. Please, can someone help?I'm suspecting operator error because using PQnotifies is exactly what psql does. Maybe you could post a small test program? Are you using a mixed case notification name?
Works here in a Pascal program built using Lazarus. You /must/ however, ensure that the session requesting the notification is kept active and is the one that's regularly checked, it's easy to lose track of this in a development framework which isolates you from the low-level handles etc.
-- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
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