Received: from malur.postgresql.org ([2a02:16a8:dc51::56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1g1Zrq-0000Dt-7H for pgsql-admin@arkaria.postgresql.org; Sun, 16 Sep 2018 16:25:50 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1g1Zro-0003zN-HA for pgsql-admin@arkaria.postgresql.org; Sun, 16 Sep 2018 16:25:48 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1g1Zro-0003z5-6Z for pgsql-admin@lists.postgresql.org; Sun, 16 Sep 2018 16:25:48 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1g1Zrh-0001Sk-N7 for pgsql-admin@postgresql.org; Sun, 16 Sep 2018 16:25:47 +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 w8GGPHbl022689; Sun, 16 Sep 2018 12:25:17 -0400 From: Tom Lane To: Laurenz Albe cc: Debraj Manna , pgsql-admin Subject: Re: Difference between C and en_US.UTF-8 Collate & CType in Postgres 10.x In-reply-to: <2637a385ee9b301b503b728fd8b1f41cab3a7e5b.camel@cybertec.at> References: <0f5ad1359ca05bb3e77c346aa012b1df1d8f5429.camel@cybertec.at> <2637a385ee9b301b503b728fd8b1f41cab3a7e5b.camel@cybertec.at> Comments: In-reply-to Laurenz Albe message dated "Sun, 16 Sep 2018 17:59:19 +0200" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <22687.1537115117.1@sss.pgh.pa.us> Date: Sun, 16 Sep 2018 12:25:17 -0400 Message-ID: <22688.1537115117@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Laurenz Albe writes: > Debraj Manna wrote: >> Will there be any other difference like in terms of index size, etc? > The size will be the same, just the ordering will be different. Just to clarify, index sizes might not be *exactly* the same. Different ordering rules might lead to different upper-page-split choices as the index grows, resulting in different amounts of unused space in some index pages. It should average out to about the same thing though. regards, tom lane