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From: Dave Page <[email protected]>
To: Thomas Munro <[email protected]>
Cc: Sandeep Thakkar <[email protected]>
Cc: Ertan Küçükoglu <[email protected]>
Cc: Adrian Klaver <[email protected]>
Cc: [email protected]
Subject: Re: Windows installation problem at post-install step
Date: Tue, 23 Jul 2024 09:28:11 +0100
Message-ID: <CABMzDKdp_fnuuB0WYEYPq5YMjkNqs4kz5D2Xqk8e+eqGxWY20g@mail.gmail.com> (raw)
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On Tue, Jul 23, 2024 at 1:27 AM Thomas Munro <[email protected]> wrote:

> On Mon, Jul 22, 2024 at 11:51 PM Sandeep Thakkar
> <[email protected]> wrote:
> > EDB's windows installer gets the locales on the system using the
> https://github.com/EnterpriseDB/edb-installers/blob/REL-16/server/scripts/windows/getlocales/getloca...
> and then substitute some patterns (
> https://github.com/EnterpriseDB/edb-installers/blob/REL-16/server/pgserver.xml.in#L2850)
> I'm not sure why we do that but that is the old code and probably @Dave
> Page  may know but I'm not sure if that piece of code is responsible for
> this change in encoding in this case.
>
> Ah, so it's calling EnumSystemLocales().  Interestingly, the
> documentation for that function says:
>
> "Note  For interoperability reasons, the application should prefer the
> EnumSystemLocalesEx function to EnumSystemLocales because Microsoft is
> migrating toward the use of locale names instead of locale identifiers
> for new locales. Any application that will be run only on Windows
> Vista and later should use EnumSystemLocalesEx."
>
> That seems to be talking about this exact issue, that we're supposed
> to be using "locale names".  I'm a little confused about the
> terminology for the various types of names and identifiers but if you
> follow the link to a example program[1] you can see that it's talking
> about the BCP47 "en-US" kind, that we want.  (That quote makes it
> sound like a new thing, but Vista came out ~17 years ago.)
>

Vista is when they added support for BCP47, but of course, back when that
code was written we were primarily supporting older versions of Windows
still, back to Windows 2000 iirc.


>
> So one idea would be that in v18, we not only change initdb.exe to
> pick a BCP47 locale name by default as I proposed in that other
> thread[2], but also in the v18 version of the EDB installer you
> consider switching that code over to EnumSystemLocalesEx().  Then we
> can start to kiss goodbye to the bad old names.  People would still
> propagate them into the future with pg_upgrade I guess, and it'd be up
> to users to replace them by updating their catalogs manually.  Does
> that make sense?
>

Yes, it does (spitballing: might be nice if we could automatically update
the catalogs as well).

-- 
Dave Page
VP, Chief Architect, Database Infrastructure
EDB: https://www.enterprisedb.com


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