Re: problem in select - Mailing list pgsql-general

On Fri, 13 Sep 2002, [utf-8] frank_lupo wrote:

> This selection is more fast in ingres vs postgres
> Ingres 6.4    0.04 sec
> Postgres 7.2  0.42 sec
> select titolo,id,anno from ircalend where anno=2002 and id in(select distinct(idcalend) from ircalend_3) order by
anno,titolo
> because ?

What happens if you do:

SELECT titolo,id.anno
  FROM ircalend
  WHERE
    anno = 2002
   AND
    EXISTS (SELECT 1 FROM ircalend_3 WHERE idcalend = id)
  ORDER BY anno, titolo


Try doing an EXPLAIN ANALYZE on your query as well. That will give you the
execution plan.


--
Nigel J. Andrews