From: Maciej Piekielniak <piechcio@isb.com.pl>
To: pgsql-sql@postgresql.org
Subject: How to optimize this query?
Date: Wed, 22 Mar 2006 18:17:15 +0100
Message-ID: <827987076.20060322181715@isb.com.pl> (raw)
Hello pgsql-sql,
I have postgresql 8.1.3 and database with about 2,7GB (90% large
objects).
When I execute this query postgresql calculate this 2min 50sec. How
can I optimize this query?
select towar.id_towar,towar.key2,towar.nazwa,0 as min,0 as
max,towar.ilosc_jed,towar.ilosc_nom,towar.ilosc_paczkowa,dostawcy.id_dostawcy,jednostka_miary.jednostka,0.0
AS ilosc_magazyn,(select sum(zlecenia_towar.ilosc*zlecenia_elementy.ilosc)
from
zlecenia_towar,zlecenia_elementy,zlecenia
where
zlecenia_towar.id_towar=towar.id_towar and zlecenia_towar.id_zlecenia_elementy=zlecenia_elementy.id_zlecenia_elementy
and zlecenia_elementy.id_zlecenia=zlecenia.id_zlecenia
and (zlecenia.id_paczka in (52,50,53))) as z_zamowien,towar.key1
from (towar LEFT JOIN dostawcy ON (towar.id_dostawcy = dostawcy.id_dostawcy) LEFT JOIN jednostka_miary ON
(towar.id_jednostka_miary = jednostka_miary.id_jednostka_miary)) where towar.policzalne=True group by
towar.id_towar,towar.key2,towar.nazwa,towar.min1,towar.max1,towar.ilosc_jed,towar.ilosc_nom,dostawcy.id_dostawcy
, jednostka_miary.jednostka,towar.ilosc_paczkowa,towar.key1 order by id_dostawcy;
--
Best regards,
Maciej mailto:piechcio@isb.com.pl
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To: pgsql-sql@postgresql.org
Cc: piechcio@isb.com.pl
Subject: Re: How to optimize this query?
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