Kai Hessing wrote:
No one any idea? *sigh*
Kai Hessing wrote:
Hi Folks,
I have a strange Problem (to be honest there are more than one, but this
is one of it) after Upgrading to Postgres 8.1.3. The following SQL seems
to produce a deadlock while doing an endless reading of a temp table:
SELECT s.sid FROM stud s, stud_vera v WHERE s.sid = v.sid AND v.veraid =
34 AND s.sid NOT IN ( SELECT sid FROM stud_vera WHERE veraid = 2 );
I'm pretty sure it's not a deadlock. It probably takes very long for
some reason; maybe an explain of that query will give some insight. You
probably lack some indices.
Alternatively, have you tried an EXCEPT query? I think this is what you
try to query:
SELECT s.sid FROM stud s, stud_vera v WHERE s.sid = v.sid AND v.veraid = 34
EXCEPT
SELECT s.sid FROM stud s, stud_vera v WHERE s.sid = v.sid AND v.veraid = 2
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Alban Hertroys
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