From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
cc: Alvaro Herrera <alvherre@2ndquadrant.com>,
        =?UTF-8?Q?Juan_Jos=c3=a9_Santamar=c3=ada_Flecha?=
 <juanjo.santamaria@gmail.com>,
        Arthur Zakirov <zaartur@gmail.com>,
        Tomas Vondra <tomas.vondra@2ndquadrant.com>,
        PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Allow to_date() and to_timestamp() to accept localized names
In-reply-to: <2f83150e-a2c0-6318-3125-d9b86e421aa2@2ndquadrant.com>
References: <20200124161814.GA8989@alvherre.pgsql>
 <32487.1579882979@sss.pgh.pa.us>
 <2f83150e-a2c0-6318-3125-d9b86e421aa2@2ndquadrant.com>
Comments: In-reply-to Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
	message dated "Fri, 24 Jan 2020 17:42:31 +0100"
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Date: Fri, 24 Jan 2020 11:46:48 -0500
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Peter Eisentraut <peter.eisentraut@2ndquadrant.com> writes:
> Looking through the patch quickly, if you want to get Unicode-fancy, 
> doing a case-insensitive comparison by running lower-case on both 
> strings is also wrong in corner cases.  All the Greek month names end in 
> sigma, so I suspect that this patch might not work correctly in such cases.

Hm.  That's basically what citext does, and I don't recall hearing
complaints about that.  What other definition of "case insensitive"
would you suggest?

			regards, tom lane