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 <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1g03HR-0007uI-JR
	for pgsql-hackers@arkaria.postgresql.org; Wed, 12 Sep 2018 11:25:57 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.89)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1g03HO-0000V1-Vf
	for pgsql-hackers@arkaria.postgresql.org; Wed, 12 Sep 2018 11:25:54 +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 <cb@df7cb.de>)
	id 1g03HO-0000Uu-La
	for pgsql-hackers@lists.postgresql.org; Wed, 12 Sep 2018 11:25:54 +0000
Received: from feynman.df7cb.de ([195.49.152.168])
	by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <cb@df7cb.de>)
	id 1g03HL-0001p8-Bo
	for pgsql-hackers@postgresql.org; Wed, 12 Sep 2018 11:25:53 +0000
Received: from msg.df7cb.de (unknown
 [IPv6:2003:5b:203b:100:7627:eaff:fe52:8e03])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(Client did not present a certificate)
	by feynman.df7cb.de (Postfix) with ESMTPSA id 429KGN6yG5z3DyB;
	Wed, 12 Sep 2018 13:25:48 +0200 (CEST)
Date: Wed, 12 Sep 2018 13:25:48 +0200
From: Christoph Berg <myon@debian.org>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>,
	Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: Collation versioning
Message-ID: <20180912112548.GC24584@msg.df7cb.de>
Mail-Followup-To: Christoph Berg <myon@debian.org>,
	Peter Eisentraut <peter.eisentraut@2ndquadrant.com>,
	Thomas Munro <thomas.munro@enterprisedb.com>,
	Pg Hackers <pgsql-hackers@postgresql.org>
References: 
 <CAEepm=0hoACQLFn8ro7jCO9-wTth2mXXS3K=s09gxKqN2jy8pA@mail.gmail.com>
 <CAEepm=3a5BC7CwsXZo3V4fw6YuAMT2nJ1krwtqOatb=vDqRWEA@mail.gmail.com>
 <20180905191014.GA29241@msg.df7cb.de>
 <CAEepm=3mKYhXS9NQCsPkGhkQxKAeZwbDneZV7QYKTDDYstTxZA@mail.gmail.com>
 <b7ce31bb-dfe5-c689-06c4-3a8536f73e6a@2ndquadrant.com>
 <CAEepm=01SJne1beXkuU0XxO3UdoG+n+BaE9X_ADXjG95s0nqbQ@mail.gmail.com>
 <CAEepm=1xGTsLDx63UEdcJ8MdG63CNJ-tsDWHbH9djtvxRH5ZWw@mail.gmail.com>
 <20180912081547.GA24584@msg.df7cb.de>
 <0447ec7b-cdb6-7252-7943-88a4664e7bb7@2ndquadrant.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <0447ec7b-cdb6-7252-7943-88a4664e7bb7@2ndquadrant.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Precedence: bulk

Re: Peter Eisentraut 2018-09-12 <0447ec7b-cdb6-7252-7943-88a4664e7bb7@2ndquadrant.com>
> > Naive idea: make that catalog shared? Collations are system-wide after
> > all.
> 
> By the same argument, extensions should be shared, but they are not.

But extensions put a lot of visible stuff into a database, whereas a
collation is just a line in some table that doesn't get into the way.

Christoph