Re: Proposal - Support for National Characters functionality

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: "Boguk, Maksym" <maksymb(at)fast(dot)au(dot)fujitsu(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Arulappan, Arul Shaji" <arul(at)fast(dot)au(dot)fujitsu(dot)com>, Tatsuo Ishii <ishii(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Proposal - Support for National Characters functionality
Date: 2013-07-31 17:43:18
Message-ID: 20130731174318.GY14652@eldon.alvh.no-ip.org
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Boguk, Maksym escribió:

> I think I give a wrong description there... it will be not GUC but
> GUC-type value which will be initialized during CREATE DATABASE and will
> be read only after, very similar to the lc_collate.
> So I think name national_lc_collate will be better.
> Function of this value - provide information about the default collation
> for the NATIONAL CHARACTERS inside the database.
> That's not limits user ability of use an alternative collation for
> NATIONAL CHARACTERS during create table via COLLATE keyword.

This seems a bit odd. I mean, if I want the option for differing
encodings, surely I need to be able to set them for each column, not at
the database level.

Also, as far as I understand what we want to control here is the
encoding that the strings are in (the mapping of bytes to characters),
not the collation (the way a set of strings are ordered). So it doesn't
make sense to set the NATIONAL CHARACTER option using the COLLATE
keyword.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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