Stefan,
* Stefan Zweig <[EMAIL PROTECTED]> [070907 10:07]:
> thanks for your quick reply. i have tried your advice and rebuilded
> all my gist indexes on the table (via drop index, create index) and
> run a vacuum full afterwards. but that did not change the fact, that
> the query on the_geom is much slower than the same one on the_geom_1.
>
[...]
>
> '...WHERE the_geom && expr;' takes about 250ms,
> '...WHERE the_geom_envelope && expr;' takes about 20ms.
>
> ANALYZE says that GIST is used. As far as I know, the GIST makes use
> only of the bounding boxes of Geometry objects, which are equal for
> each object. How does it come that the query time using the_geom is more than
> *ten times slower* than the query time using the_geom_envelope?"
It would help if you post the explain analyse output.
Regards,
Frank
--
Frank Koormann | ++49-541-335 08 30 | http://www.intevation.net/
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