Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1gSRjD-00043g-P0 for pgsql-hackers@arkaria.postgresql.org; Thu, 29 Nov 2018 19:11:59 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1gSRjC-0004vk-Fw for pgsql-hackers@arkaria.postgresql.org; Thu, 29 Nov 2018 19:11:58 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1gSRjC-0004tD-4O for pgsql-hackers@lists.postgresql.org; Thu, 29 Nov 2018 19:11:58 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1gSRj9-0001VT-FY for pgsql-hackers@lists.postgresql.org; Thu, 29 Nov 2018 19:11:56 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id wATJBrwY012399; Thu, 29 Nov 2018 14:11:53 -0500 From: Tom Lane To: Alexander Kuzmenkov cc: pgsql-hackers@lists.postgresql.org, Mark Dilger Subject: Re: "SELECT ... FROM DUAL" is not quite as silly as it appears In-reply-to: <6d51c9bb-ccc6-92fd-b6ac-05f0d5546d70@postgrespro.ru> References: <15944.1521127664@sss.pgh.pa.us> <154342395130.2093.8013327151440360209.pgcf@coridan.postgresql.org> <154342412161.2094.14859341952034622342.pgcf@coridan.postgresql.org> <6d51c9bb-ccc6-92fd-b6ac-05f0d5546d70@postgrespro.ru> Comments: In-reply-to Alexander Kuzmenkov message dated "Thu, 29 Nov 2018 15:08:31 +0300" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <12397.1543518713.1@sss.pgh.pa.us> Date: Thu, 29 Nov 2018 14:11:53 -0500 Message-ID: <12398.1543518713@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Alexander Kuzmenkov writes: > I was also looking at this patch, here are some things I noticed: Thanks for reviewing! I incorporated your suggestions in the v4 patch I just sent. regards, tom lane