Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cJZO8-0007Pa-BF for pgsql-general@arkaria.postgresql.org; Wed, 21 Dec 2016 05:24:28 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84_2) (envelope-from ) id 1cJZO7-0007PX-5f for pgsql-general@arkaria.postgresql.org; Wed, 21 Dec 2016 05:24:27 +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 4.84_2) (envelope-from ) id 1cJZO6-0007PD-Ci for pgsql-general@postgresql.org; Wed, 21 Dec 2016 05:24:26 +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 4.84_2) (envelope-from ) id 1cJZNz-0005nI-IF for pgsql-general@postgresql.org; Wed, 21 Dec 2016 05:24:25 +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 uBL5OHoN011658; Wed, 21 Dec 2016 00:24:17 -0500 From: Tom Lane To: James Zhou cc: pgsql-general@postgresql.org Subject: Re: How well does PostgreSQL 9.6.1 support unicode? In-reply-to: References: Comments: In-reply-to James Zhou message dated "Tue, 20 Dec 2016 16:41:51 -0800" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <11656.1482297857.1@sss.pgh.pa.us> Date: Wed, 21 Dec 2016 00:24:17 -0500 Message-ID: <11657.1482297857@sss.pgh.pa.us> X-Pg-Spam-Score: -5.0 (-----) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-general Precedence: bulk Sender: pgsql-general-owner@postgresql.org James Zhou writes: > - *But their sorting order seems to be undefined. Can anyone comment > the sorting rules?* Well, it would depend on lc_collate, which you have not told us, and it would also depend on how well your platform's strcoll() function implements that collation; but you have not told us what platform this is running on. Most of the other behaviors you mention are also partly or wholly dependent on which software you use with Postgres and whether you've correctly configured that software. So it's pretty hard to answer this usefully with only this much info. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general