Re: Inconsistent "ICU Locale" output on older server versions

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Euler Taveira" <euler(at)eulerto(dot)com>
Cc: "Christoph Berg" <myon(at)debian(dot)org>, "Peter Eisentraut" <peter(at)eisentraut(dot)org>, pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Inconsistent "ICU Locale" output on older server versions
Date: 2022-04-15 16:47:42
Message-ID: 1651295.1650041262@sss.pgh.pa.us
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"Euler Taveira" <euler(at)eulerto(dot)com> writes:
> On Fri, Apr 15, 2022, at 11:58 AM, Christoph Berg wrote:
>> When running psql 15 against PG 14, the output is this:
>> The "ICU Locale" column is now populated, that seems wrong.

> Good catch!

Indeed.

> Since dataiculocale allows NULL, my suggestion is to use NULL instead of an
> empty string. It is consistent with a cluster whose locale provider is libc.

Yeah, I agree. We should make the pre-v15 output match what you'd see
if looking at a non-ICU v15 database.

regards, tom lane

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