At 17:52 06.09.01, you wrote:
>It is copying ALL of the results into the temp table. If you can (e.g.
>you know you will
>never want more than N records), add a LIMIT 0,N to the end of the SELECT
>so that when you
>have an old timestamp it will not hang the database.
as i use
select count (*) from blah where blahblah;
(actually i am just interested whether there is a row or not matching the
criterion. under normal operations there should never be more than one match)
i donīt understand how a limit 0,1 would help here. wouldnīt it just say
that no more than one count(*) result should be returned (which never the
case anyway because count(*) returns exactly one row)?
henning
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