connection management

As I am not sure how to execute this function(is there analog of DUAL table
in Oracle), I am using something like this;

SELECT pg_cancel_backend(15429) FROM pg_stat_activity;

The result is;

ERROR: function pg_cancel_backend(integer) does not exist

Aby Ideas?- Hide quoted text -

On 10/18/07, A. Kretschmer <andreas(dot)kretschmer(at)schollglas(dot)com> wrote:
>
> am Thu, dem 18.10.2007, um 11:34:29 +0200 mailte Nikolai Cheltsov
> folgendes:
> > Hi All,
> >
> > I could not find any information about this simple question.
> >
> > How can I understand who is connected to a given database? How can I
> kill all
> > connections to a database in order, for example, to remove it?
>
> You can use pg_stat_activity to find all connected backends, and you can
> use pg_cancel_backend(pid int) to kill a specific backend.
>
> Andreas
> --
> Andreas Kretschmer
> Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
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>