http://www.postgresql.org/docs/8.1/interactive/sql-createtrigger.html
SELECT does not modify any rows so you can not create SELECT triggers.
Rules and views are more appropriate in such cases.
On 4/14/06, A. Kretschmer <andreas.kretschmer@schollglas.com> wrote:
> am 13.04.2006, um 18:46:02 +0300 mailte Sergey Levchenko folgendes:
> > Hi
> >
> > If I can not do insert/update action with on select rule, how can I
> > execute some procedure or any sql statement on select event?
>
> With a TRIGGER.
>
>
> HTH, Andreas
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