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 1pU7a9-0000C9-V9 for pgsql-hackers@arkaria.postgresql.org; Mon, 20 Feb 2023 14:55:57 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1pU7a7-0004fr-2p for pgsql-hackers@arkaria.postgresql.org; Mon, 20 Feb 2023 14:55:55 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pU7a6-0004fh-Ok for pgsql-hackers@lists.postgresql.org; Mon, 20 Feb 2023 14:55:54 +0000 Received: from wnew3-smtp.messagingengine.com ([64.147.123.17]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pU7a4-0003oU-IF for pgsql-hackers@postgresql.org; Mon, 20 Feb 2023 14:55:54 +0000 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.west.internal (Postfix) with ESMTP id 743D72B077FC; Mon, 20 Feb 2023 09:55:48 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Mon, 20 Feb 2023 09:55:49 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t=1676904948; x= 1676912148; bh=9kn9J7UqSl+EhH+K62klRuw8/T0dhjK51U1HYss9Flo=; b=F f0JYax4Fcu1b50OIhiQzhDd3msKzD6Jp+1zh6rHcIzvERIanf8CpEz1Hz7mZVIFj 3L5t9+TwZj/XMX1N5SvGAzEYGnbdhUw7hXh6wqDkdkLe/TpL+9u/4x3FDf8RfBf4 6+5Xq+OOTTaeaP9cA0wu5jrktRDLcrQjVvso0mv6ndXZ/gaRIJZPVzyqHxFlPu/9 Mrm35EucqzApbsleSRZDxDsJhBSQJhjHlm8IBPjuwG21+okym/LC43IJkizw6t9V Z/vmqfya+DWsao5LG9d1yKCVQAdb4m/qZ+RSArkUu0VlQDMoLw9db3CgvadiHK3y taBpvJiRVSG3Z+wCAYIRw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrudejhedgieegucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepkfffgggfuffvvehfhfgjtgfgsehtjeertddtfeejnecuhfhrohhmpefrvght vghrucfgihhsvghnthhrrghuthcuoehpvghtvghrrdgvihhsvghnthhrrghuthesvghnth gvrhhprhhishgvuggsrdgtohhmqeenucggtffrrghtthgvrhhnpeehleffgeegudejteei hfelteduvdeifffhffdvjedvffegjeekudeludehudeifeenucevlhhushhtvghrufhiii gvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehpvghtvghrrdgvihhsvghnthhrrghu thesvghnthgvrhhprhhishgvuggsrdgtohhm X-ME-Proxy: Feedback-ID: i131946ab:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 20 Feb 2023 09:55:46 -0500 (EST) Message-ID: <96ab0022-b629-2e99-9a4f-f1c886584cd3@enterprisedb.com> Date: Mon, 20 Feb 2023 15:55:45 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.6.1 Subject: Re: Move defaults toward ICU in 16? Content-Language: en-US To: Jeff Davis , Pavel Stehule Cc: Andres Freund , Tom Lane , Thomas Munro , Robert Haas , pgsql-hackers@postgresql.org References: <510d284759f6e943ce15096167760b2edcb2e700.camel@j-davis.com> <1590310.1675379449@sss.pgh.pa.us> <337d581bae5d6253919f70acdfc184631f0ad41b.camel@j-davis.com> <20230209022234.gihj4apas6ycaddq@awork3.anarazel.de> <5ffeafe843d43a975f31479fbd211ab88404841b.camel@j-davis.com> <20230211020042.uthdgj72kp3xlqam@awork3.anarazel.de> <20230214175957.idkb7shsqzp5nbll@awork3.anarazel.de> <2a7feb71dbdcea31478b3974b8075982ac2326d2.camel@j-davis.com> From: Peter Eisentraut In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On 17.02.23 21:43, Jeff Davis wrote: >> select row_number() over (order by nazev collate "cs-x-icu"), nazev >> from obce >> except select row_number() over (order by nazev collate "cs_CZ"), >> nazev from obce; >> >> returns a not empty set. So minimally for Czech collate, an index >> rebuild is necessary > Yes, that's true of any locale change, provider change, or even > provider version change. I'm confused. We are not going to try to change existing databases to a different collation provider during pg_upgrade, are we?