On Sat, 6 Mar 1999, Vadim Mikheev wrote:
> Oleg Broytmann wrote:
> >
> > Hi!
> >
> > I am continuing playing with the query (I reduced it to):
> > SELECT sh.distr_id , d.distr_id
> > FROM central cn, shops sh, districts d
> > WHERE cn.shop_id = sh.shop_id
> >
> > and got 27963 rows. I filtered it out (with awk:) where $1 == $2 (1st
> > column is equal to second) and got 3104 rows.
> >
> > But the query
> > SELECT d.*
> > FROM central cn, shops sh, districts d
> > WHERE cn.shop_id = sh.shop_id AND sh.distr_id = d.distr_id
> >
> > returned 0 rows.
> >
> > Where is the bug?
>
> Please post me EXPLAIN VERBOSE for second query.
EXPLAIN VERBOSE SELECT d.* FROM central cn, shops sh, districts d WHERE cn.shop_id = sh.shop_id AND sh.distr_id
=d.distr_id
;
pqReadData() -- backend closed the channel unexpectedly.This probably means the backend terminated abnormally before or
whileprocessing the request.
We have lost the connection to the backend, so further processing is impossible. Terminating.
:(((
> Vadim
>
Oleg.
---- Oleg Broytmann http://members.xoom.com/phd2/ phd2@earthling.net Programmers don't die, they
justGOSUB without RETURN.
