diff --git a/doc/TODO.detail/alpha b/doc/TODO.detail/alpha index e30a969ee23b3bf90a0d842892c16208a6277c5e..76c352760da89d5d434e32e0c2bf853702120fbf 100644 --- a/doc/TODO.detail/alpha +++ b/doc/TODO.detail/alpha @@ -105,3 +105,213 @@ Univ. of Cincinnati College of Medicine fax: (513) 558-8474 +From gatgul@voicenet.com Thu Jul 22 21:58:42 1999 +Received: from voicenet.com (mail12.voicenet.com [207.103.0.6]) + by candle.pha.pa.us (8.9.0/8.9.0) with SMTP id VAA20482 + for ; Thu, 22 Jul 1999 21:58:39 -0400 (EDT) +Received: (qmail 17312 invoked from network); 23 Jul 1999 01:58:33 -0000 +Received: from dialpool1745.voicenet.com (HELO voicenet.com) (209.71.57.45) + by mail12.voicenet.com with SMTP; 23 Jul 1999 01:58:33 -0000 +Sender: gat +Message-ID: <3797CB70.7554322B@voicenet.com> +Date: Thu, 22 Jul 1999 21:54:56 -0400 +From: Uncle George +Organization: Big Endian +X-Mailer: Mozilla 4.07 [en] (X11; I; Linux 2.0.36 i686) +MIME-Version: 1.0 +To: Bruce Momjian +Subject: Re: [PORTS] RedHat6.0 & Alpha +References: <199907221830.OAA06403@candle.pha.pa.us> +Content-Type: multipart/mixed; boundary="------------8DF2D5BA86BB12328C66DD16" +Status: ROr + +This is a multi-part message in MIME format. +--------------8DF2D5BA86BB12328C66DD16 +Content-Type: text/plain; charset=us-ascii +Content-Transfer-Encoding: 7bit + +Bruce Momjian wrote: + +> +> Can I now put back optimization to -O2 on alpha? Please send me your +> other diffs. +> + +--------------8DF2D5BA86BB12328C66DD16 +Content-Type: application/octet-stream; name="g.gz" +Content-Transfer-Encoding: base64 +Content-Disposition: attachment; filename="g.gz" + +H4sICMDHlzcAA2cA1D1rc9tGkp/pXzFyKjFJQyIwAElQkrWl2MpGV36kJMWX2r09FkiCFNYg +SAOgYieb++3XPTN4cgACfNiyatcBgUFPv6enZ6Zx0gn8cWdkjT/Y3qRjjcd2EHTureCe/TNd +eeOT8ZN2u01OKjQ8WfjOrHF3vyL/tXIJpYSqp4Z5Sk2iDQaDJ8fHx5XApCFo6intnXY1DqGd +/WOIUU3Ru4T9JOQ7xxu7q4lNnqZAn9w/hUfwv5XjhTp9ckTwLlzTJvyj9cgH+3MLHv8JTxq+ +Ha58jzR52xb5P3h4Bg//koMwREMZDPmryAWOM1wdb4HzKytczctxbnLCWtioFPlCWABCQJPD +kElC63YVrafFspjYU8ezyS8312+uaKPR0FTD7Jq6BJfxveU38Z8EFUIa0ALecm0Pu2/wFxqN ++zPGwqiziIk1O8sRXtablNSeDr0PIlIb9+QFUdmLAACuA+cPezFlJDHmNTpt8nLhPdh+SBid +4YJAD/bM9km7g3xHCPekzQnQyP+SJiBHjskz8oxDuCffvxDknXGqIllFHBE4CY4cBCf+dh3M +pAbvjULftvE/48V8afl2mZORNN7W0UhAZaBop2rv1KAlzqanGOq6s1mFjht0RivHDR0viG03 +0rpRiIY7ni+Fv7EUwi9GayYsLLhpAYNHabvLwDIELPA7HBZcrMFiINYgMPfDqFhzP5Wp4MYD 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+wgNeeQcgh+oU16C+0rTfp0pgKnPefzvY4k97jLgO82+N8Q4cx/6TnC79oU+YWv5mTl41fcyN +MY/Vx1yNU75zFdR2xAdHloDL6lHiQ/aKNHPMoOpRsh0hdt337gF6qYAZ+s5Kd2sFwe6QDxPl +/wOU7Ogc2/cAAA== +--------------8DF2D5BA86BB12328C66DD16-- + + + diff --git a/doc/TODO.detail/outer b/doc/TODO.detail/outer index 584801eba1b10b38791f99b8b4c2a811251224b3..99eab30d36c570179a0c37685f8edc497461d2ca 100644 --- a/doc/TODO.detail/outer +++ b/doc/TODO.detail/outer @@ -311,3 +311,82 @@ structure... - Tom +From owner-pgsql-hackers@hub.org Wed Jul 21 02:35:13 1999 +Received: from hub.org (hub.org [216.126.84.1]) + by candle.pha.pa.us (8.9.0/8.9.0) with ESMTP id CAA13837 + for ; Wed, 21 Jul 1999 02:35:12 -0400 (EDT) +Received: from hub.org (hub.org [216.126.84.1]) + by hub.org (8.9.3/8.9.3) with ESMTP id CAA88539; + Wed, 21 Jul 1999 02:27:41 -0400 (EDT) + (envelope-from owner-pgsql-hackers@hub.org) +Received: by hub.org (TLB v0.10a (1.23 tibbs 1997/01/09 00:29:32)); Wed, 21 Jul 1999 02:24:08 +0000 (EDT) +Received: (from majordom@localhost) + by hub.org (8.9.3/8.9.3) id CAA87850 + for pgsql-hackers-outgoing; Wed, 21 Jul 1999 02:23:13 -0400 (EDT) + (envelope-from owner-pgsql-hackers@postgreSQL.org) +Received: from localhost (IDENT:root@hectic-2.jpl.nasa.gov [128.149.68.204]) + by hub.org (8.9.3/8.9.3) with ESMTP id CAA87810 + for ; Wed, 21 Jul 1999 02:22:52 -0400 (EDT) + (envelope-from lockhart@alumni.caltech.edu) +Received: from alumni.caltech.edu (lockhart@localhost [127.0.0.1]) + by localhost (8.8.7/8.8.7) with ESMTP id GAA14480; + Wed, 21 Jul 1999 06:20:22 GMT +Message-ID: <379566A6.A4CDF97F@alumni.caltech.edu> +Date: Wed, 21 Jul 1999 06:20:22 +0000 +From: Thomas Lockhart +X-Mailer: Mozilla 4.6 [en] (X11; I; Linux 2.0.36 i686) +X-Accept-Language: en +MIME-Version: 1.0 +To: Tom Lane +CC: Bruce Momjian , pgsql-hackers@postgreSQL.org +Subject: Re: [HACKERS] Another reason to redesign querytree representation +References: <591.932505751@sss.pgh.pa.us> +Content-Type: text/plain; charset=us-ascii +Content-Transfer-Encoding: 7bit +Sender: owner-pgsql-hackers@postgreSQL.org +Precedence: bulk +Status: RO + +> Thomas, what do you think is needed for outer joins? + +Bruce and I have talked about it some already: + +For outer joins, tables must be combined in a particular order. For +example, a left outer join requires that any entries in the left-side +table which do not have a corresponding entry in the right-side table +be expanded with nulls during the join. The information on the outer +join can't be carried by the rte since the same table can appear twice +in an outer join expression: + + select * from t1 left join t2 using (i) + left join t1 on (i = t1.j); + +For a query like + + select * from t1 left join t2 using (i) where t2.j = 3; + +istm that the outer join must be done before the t2 qualification is +applied, and that another ordering may produce the wrong result. + +>From what I understand Bruce to say, the planner/optimizer is allowed +to try all kinds of permutations of plans, choosing the one with the +lowest cost. But if the info for the join is carried in a +qualification node, then the planner/optimizer must know that it can't +reorder the query as freely as it does now. + +I was thinking of having a new qualification node to carry this info, +and it could be transformed into a mergejoin node which has a couple +of new fields indicating left and/or right outer join behavior. + +A hashjoin method may be possible for queries which are structured as +a left outer join; other outer joins will need to use the mergejoin +method. Also, some poorly-qualified outer joins reduce to inner joins, +and perhaps the optimizer can be smart enough to realize this. + + - Thomas + +-- +Thomas Lockhart lockhart@alumni.caltech.edu +South Pasadena, California + +