Christian Fritze [EMAIL PROTECTED] writes:
explain select * from allmain where exists (select distinct
dokids_as_int from allslwfull where dokids_as_int = idn and
wort_nouml_lower like 'gen%')
Try dropping the "distinct" on the inner select. As a moment's thought
will reveal, it's
Adding a LIMIT 1 in the subplan may also help -- as you only need a
single match to make it true so additional finds are useless -- it'll
stop sooner or will be more likely to use an index than a full table
scan.
--
Rod Taylor
There are always four sides to every story: your side, their side,
"Rod Taylor" [EMAIL PROTECTED] writes:
Adding a LIMIT 1 in the subplan may also help -- as you only need a
single match to make it true so additional finds are useless -- it'll
stop sooner or will be more likely to use an index than a full table
scan.
I believe this is not necessary; the
Adding a LIMIT 1 in the subplan may also help -- as you only need a
single match to make it true so additional finds are useless -- it'll
stop sooner or will be more likely to use an index than a full table
scan.
--
Rod Taylor
I'm not sure if I understand you correctly here: the subplan
