Re: LISTEN / NOTIFY

From: Martijn van Oosterhout <kleptog(at)svana(dot)org>
To: Hannes Dorbath <light(at)theendofthetunnel(dot)de>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: LISTEN / NOTIFY
Date: 2006-12-08 14:48:00
Message-ID: 20061208144800.GI25912@svana.org
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

On Fri, Dec 08, 2006 at 03:38:49PM +0100, Hannes Dorbath wrote:
> Is there a way I can have notifications to be streamed to the listener,
> so I don't need to poll with LISTEN?
>
> LISTEN foo;
> LISTEN
> NOTIFY foo;
> NOTIFY
> Asynchronous notification "foo" received from server process with PID 3593.
>
> This does work for the same backend, but not for notifications issued
> from another one.

AIUI they are, it's just that the client needs to be looking for
incoming data. If you're using psql for example, I don't beleive it
checks for incoming data until you send a command.

How you actually acheive that in your code is a seperate question and
depends on the language you're using.

Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.

In response to

Browse pgsql-general by date

  From Date Subject
Next Message Edoardo Panfili 2006-12-08 15:16:03 strange (maybe) behaviour of table lock
Previous Message Angva 2006-12-08 14:47:37 Re: loading data, creating indexes, clustering, vacuum...