Re: Patch to address concerns about ICU collcollate stability in v10 (Was: CREATE COLLATION does not sanitize ICU's BCP 47 language tags. Should it?)

From: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
To: Peter Geoghegan <pg(at)bowt(dot)ie>
Cc: Andreas Karlsson <andreas(at)proxel(dot)se>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: Patch to address concerns about ICU collcollate stability in v10 (Was: CREATE COLLATION does not sanitize ICU's BCP 47 language tags. Should it?)
Date: 2017-09-25 18:42:22
Message-ID: e3fbdaa7-d45c-6c8e-191f-993798ba4d69@2ndquadrant.com
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On 9/25/17 00:24, Peter Geoghegan wrote:
> * Creates root collation as root-x-icu (collcollate "root"), not
> und-x-icu. "und" means undefined language.

I'm curious about this point. "und" is defined in BCP 47. I don't see
"root" defined anywhere. ICU converts the root collation to "und",
AFAIK, so it seems to agree with the current naming.

--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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