Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1objNf-0000ru-Ix for pgsql-bugs@arkaria.postgresql.org; Fri, 23 Sep 2022 14:10:15 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1objNe-0005aV-IH for pgsql-bugs@arkaria.postgresql.org; Fri, 23 Sep 2022 14:10:14 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1objNe-0005aL-A8 for pgsql-bugs@lists.postgresql.org; Fri, 23 Sep 2022 14:10:14 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1objNc-0000Ux-4S for pgsql-bugs@lists.postgresql.org; Fri, 23 Sep 2022 14:10:13 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 28NEA9K32100291; Fri, 23 Sep 2022 10:10:09 -0400 From: Tom Lane To: Richard Guo cc: Jeff Janes , sindysenorita@gmail.com, pgsql-bugs@lists.postgresql.org Subject: Re: BUG #17618: unnecessary filter column <> text even after adding index In-reply-to: References: <17618-7a2240bfaa7e84ae@postgresql.org> <349136.1663601052@sss.pgh.pa.us> <739953.1663701274@sss.pgh.pa.us> <946195.1663718159@sss.pgh.pa.us> Comments: In-reply-to Richard Guo message dated "Fri, 23 Sep 2022 21:29:39 +0800" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <2100289.1663942209.1@sss.pgh.pa.us> Date: Fri, 23 Sep 2022 10:10:09 -0400 Message-ID: <2100290.1663942209@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Richard Guo writes: > So I think we need to run eval_const_expressions on indexquals before we > check for duplicate clauses, something like attached. [ squint... ] Surely that was done long before we ever get here? regards, tom lane