Am Montag, 7. Mai 2007 15:53 schrieb Jonas Henriksen:
> while if I add a GROUP BY data_logger the query uses a seq scan and a
>
> lot of time:
> >> explain analyze SELECT max(date_time) FROM data_values GROUP BY
> data_logger_id;
I don't think there is anything you can do about this.
--
Peter Eisentraut
http://developer.postgresql.org/~petere/