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From: Igor Korot <ikorot01@gmail.com>
To: Ron Johnson <ronljohnsonjr@gmail.com>
To: pgsql-generallists.postgresql.org <pgsql-general@lists.postgresql.org>
Subject: Re: Choosing default collation/ctype
Date: Sun, 3 May 2026 16:51:32 -0500
Message-ID: <CA+FnnTz0bXuTUR5CqXNM5xR3UM9MbTOkYdUP5rUNGSQxZaznXg@mail.gmail.com> (raw)
In-Reply-To: <CANzqJaABDxgMYHOWVKFgZC-B1-JznyyghCPHVbwUR9datT-MWg@mail.gmail.com>
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	<CANzqJaABDxgMYHOWVKFgZC-B1-JznyyghCPHVbwUR9datT-MWg@mail.gmail.com>

Hi, Ron.

On Sun, May 3, 2026 at 4:05 PM Ron Johnson <ronljohnsonjr@gmail.com> wrote:
>
> On Sun, May 3, 2026 at 4:52 PM Igor Korot <ikorot01@gmail.com> wrote:
>>
>> Hi,
>>
>> On Sun, May 3, 2026 at 3:09 PM Ron Johnson <ronljohnsonjr@gmail.com> wrote:
>> >
>> > On Sun, May 3, 2026 at 3:52 PM Igor Korot <ikorot01@gmail.com> wrote:
>> >>
>> >> Hi, ALL,
>> >> In the CREATE DATABASE statement I can use encoding/collation/ctype.
>> >>
>> >> I can retrieve the encoding list with:
>> >>
>> >> [code]
>> >> SELECT pg_encoding_to_char( conforencoding ) AS name FROM pg_conversion
>> >> [/code]
>> >>
>> >> And then I can get a list of collations/ctypes with:
>> >>
>> >> [code]
>> >> SELECT collname, collencoding, collprovider collctype FROM pg_collation
>> >> [/code]
>> >>
>> >> And then add a logic in my UI to switch collations/ctypes based on encoding.
>> >>
>> >> However, what I wonder is:
>> >>
>> >> Is there a way to select a default collation/ctype for a specific encoding?
>> >>
>> >> Or maybe I'm overthinking it and I should let the user choose and if
>> >> nothing - just keep those 2 as "Default" and let the server pick it
>> >> up. However it will be weird, especially from me as a user POV.
>> >
>> >
>> > You know your data, not us.  The first question I'd try to is "how much client text data is not compatible with bog-standard UTF8?"
>>
>> I don't.
>> Just trying to create a generic tool to use for people everywhere...
>
>
> Then choose UTF8.

Let me give you a quick run of what I'm trying to do:

In my code I have 3 combo boxes: encoding, collation and ctype.

Initially they all have a value of "Default".

Lets say a user selected "KOI8-R" as an emcoding.

What I will do is populate collation and ctype combo boxes with
values available for such encodings.
But I want to go a little further and change the values in those
to be the default collation/ctype for the "KOI8-R" encoding.

Now are you saying I should choose the one that have "UTF8"
in it?

Thank you.

>
> --
> Death to <Redacted>, and butter sauce.
> Don't boil me, I'm still alive.
> <Redacted> lobster!

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