X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [64.117.224.130]) by svr1.postgresql.org (Postfix) with ESMTP id 64508D1B4ED for ; Tue, 7 Oct 2003 17:13:37 +0000 (GMT) Received: from svr1.postgresql.org ([64.117.224.193]) by localhost (neptune.hub.org [64.117.224.130]) (amavisd-new, port 10024) with ESMTP id 49044-06 for ; Tue, 7 Oct 2003 14:12:52 -0300 (ADT) Received: from serwer.skawsoft.com.pl (serwer.skawsoft.com.pl [213.25.37.66]) by svr1.postgresql.org (Postfix) with ESMTP id 6C87CD1B511 for ; Tue, 7 Oct 2003 14:12:51 -0300 (ADT) Received: from klaster.net (core-1.citynet.pl [80.48.135.69]) by serwer.skawsoft.com.pl (Postfix) with ESMTP id DC8622B3CB; Tue, 7 Oct 2003 19:11:53 +0200 (CEST) Message-ID: <3F82F3C8.6090102@klaster.net> Date: Tue, 07 Oct 2003 19:11:36 +0200 From: Tomasz Myrta User-Agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; pl-PL; rv:1.5) Gecko/20030916 X-Accept-Language: pl, en-us, en MIME-Version: 1.0 To: pginfo Cc: "pgsql-sql@postgresql.org" Subject: Re: Interest query plan References: <3F82D4FE.DD4E275B@t1.unisoftbg.com> <3F82E734.8060003@klaster.net> <3F82DD93.4B3CB117@t1.unisoftbg.com> In-Reply-To: <3F82DD93.4B3CB117@t1.unisoftbg.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at postgresql.org X-Archive-Number: 200310/83 X-Sequence-Number: 15483 > I have also another good example for a slow left join work. > Can I do it better? > explain analyze select * from a_doc D join A_SKLAD S ON(D.IDS=S.IDS_DOC) join > A_MED M ON(S.IDS_MED=M.IDS) where d > .date_op >= 9600 and d.date_op <= 9700; > -> Seq Scan on a_doc d (cost=0.00..13145.43 rows=11167 > width=1344) (actual time=0.22..1316.10 rows=9432 loops=1) I wouldn't expect too much from query, which starts joining over 10k rows and returns over 60000 rows. Do you really need such a big result? Regards, Tomasz Myrta