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From: Peter Eisentraut <peter_e@gmx.net>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Subject: Re: POSIX Regular Expression question
Date: Mon, 5 Sep 2005 18:07:15 +0200
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Cc: Aldor <an@mediaroot.de>, pgsql-sql@postgresql.org
References: <431C4EB2.80401@mediaroot.de> <200509051619.29210.peter_e@gmx.net>
	<20050905151331.GA19192@surnet.cl>
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Am Montag, 5. September 2005 17:13 schrieb Alvaro Herrera:
> Note that [:alpha:] and such character classes are defined by POSIX to
> be locale independent:
>
> alvherre=# select 'á' ~ '[a-z]';
>  ?column?
> ----------
>  f
> (1 fila)
>
> alvherre=# select 'á' ~ '[[:alpha:]]';
>  ?column?
> ----------
>  t
> (1 fila)

I don't think this addresses the concern I intended to raise.  The first query 
should succeed for all letters between a and z, the second should succeed for 
all letters.  Neither is guaranteed to succeed only for all "normal" Latin 
letters a, b, c, ... z.

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/