Received: from maia.hub.org (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id B90F4632DF4 for ; Sun, 31 Jan 2010 20:50:54 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.208.211]) (amavisd-maia, port 10024) with ESMTP id 91934-02 for ; Mon, 1 Feb 2010 00:50:36 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-px0-f194.google.com (mail-px0-f194.google.com [209.85.216.194]) by mail.postgresql.org (Postfix) with ESMTP id DC5E0632B35 for ; Sun, 31 Jan 2010 20:50:43 -0400 (AST) Received: by pxi32 with SMTP id 32so3333857pxi.15 for ; Sun, 31 Jan 2010 16:50:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:reply-to:received :in-reply-to:references:from:date:x-google-sender-auth:message-id :subject:to:content-type:content-transfer-encoding; bh=gJbDXTPqZCsBrexG7ZuxuFjqhDC7ykEhgnm0cfGV3ZI=; b=XPRYlRHQbI6k1g8YYzIz/hjWU5DiAVqvX3rf9R4/M89taogNSfrTHg/ydXZEMoI1aX uUb5Lod2PW0Gwuk3/uGvFj25mWVuNvnBDIXRLqTlecEsCI6SOB4lsB4lxxr9XlSOQ/aM uLQ+sFsSVvJpWkg3b0+m88mNknxz0vj2Na87s= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:reply-to:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:content-type :content-transfer-encoding; b=LmsPWPt/hEGTXRWKatzCDKmHLXMqRb8UqA/oUo1iyGXZmt5n3oyxtawrhyVoiMtiY+ 8xNB3OCjHACjBSxeoz+6lKPZa7QMj8XswOafKMTSu1K0g5pnOrxfEkCajtps8XqZXhud U+SPmX1KC6LZHYF+WFJCwsaK2cHapeiQSK6WM= MIME-Version: 1.0 Reply-To: dclements89@gmail.com Received: by 10.114.237.24 with SMTP id k24mr2675984wah.24.1264985442112; Sun, 31 Jan 2010 16:50:42 -0800 (PST) In-Reply-To: <1f30b80c1001290049ub864091r8298fca3daa0eb69@mail.gmail.com> References: <1f30b80c1001290049ub864091r8298fca3daa0eb69@mail.gmail.com> From: Dave Clements Date: Mon, 1 Feb 2010 11:50:22 +1100 X-Google-Sender-Auth: 474d5ae0fafcfe93 Message-ID: <1f30b80c1001311650q264dfda0uf9894cac3b9e0c3e@mail.gmail.com> Subject: Fwd: Help required on query performance To: pgsql-sql Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-0.554 tagged_above=-10 required=5 tests=AWL=-0.555, BAYES_50=0.001 X-Spam-Level: X-Archive-Number: 201001/56 X-Sequence-Number: 33592 Hello, I have this query in my system which takes around 2.5 seconds to run. I have diagnosed that the problem is actually a hashjoin on perm and s_ast_role tables. Is there a way I can avoid that join? I just want to change the query and no environment change. SELECT =A0ai.aid, =A0SUM(ai.score) as search_score FROM =A0sq_sch_idx ai, =A0( =A0 =A0SELECT =A0 =A0 =A0a.aid =A0 =A0FROM =A0 =A0 =A0t a =A0 =A0 =A0INNER JOIN slink l ON l.minorid =3D a.aid =A0 =A0 =A0INNER JOIN slink_tree t ON t.linkid =3D l.linkid =A0 =A0WHERE =A0 =A0 =A0(t.treeid LIKE '0005%') =A0 =A0 =A0AND a.status =A0>=3D '16' =A0 =A0 =A0AND a.type_code IN =A0 =A0 =A0( =A0 =A0 =A0 =A0SELECT type_code FROM t_typ_inhd WHERE inhd_type_code IN ('page') OR type_code IN ('file', 'page_rss_feed') =A0 =A0 =A0) =A0 =A0 =A0AND a.aid IN =A0 =A0 =A0( =A0 =A0 =A0 =A0SELECT =A0 =A0 =A0 =A0 =A0p.aid =A0 =A0 =A0 =A0FROM =A0 =A0 =A0 =A0 =A0perm p LEFT JOIN s_ast_role r ON (p.userid =3D r.roleid) =A0 =A0 =A0 =A0WHERE =A0 =A0 =A0 =A0 =A0( =A0 =A0 =A0 =A0 =A0 =A0p.userid IN ('7') OR r.userid IN ('7') =A0 =A0 =A0 =A0 =A0) AND =A0 =A0 =A0 =A0 =A0( =A0 =A0 =A0 =A0 =A0 =A0( =A0 =A0 =A0 =A0 =A0 =A0 =A0p.permission =3D '1' =A0 =A0 =A0 =A0 =A0 =A0 =A0AND =A0 =A0 =A0 =A0 =A0 =A0 =A0( =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0( =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0p.userid <> '7' OR =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0(r.userid IS NULL OR r.userid <> '7') =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0) =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0OR =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0(p.userid =3D '7' AND granted =3D '1') =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0OR =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0(r.userid =3D '7' AND granted =3D '1') =A0 =A0 =A0 =A0 =A0 =A0 =A0) =A0 =A0 =A0 =A0 =A0 =A0) =A0 =A0 =A0 =A0 =A0 =A0OR =A0 =A0 =A0 =A0 =A0 =A0(p.permission > '1' AND p.granted =3D '1') =A0 =A0 =A0 =A0 =A0) =A0 =A0 =A0 =A0 =A0AND a.aid=3Dp.aid =A0 =A0 =A0 =A0GROUP BY =A0 =A0 =A0 =A0 =A0p.aid =A0 =A0 =A0 =A0HAVING =A0 =A0 =A0 =A0 =A0MIN(p.granted) <> '0' =A0 =A0 =A0) =A0) asset_check WHERE =A0(ai.aid=3Dasset_check.aid) =A0AND (ai.value LIKE '%download%') GROUP BY =A0ai.aid ; Thanks