Re: Problem in 'ORDER BY' of a column using a created collation?

Nishant Sharma <nishant.sharma@enterprisedb.com>

From: Nishant Sharma <nishant.sharma@enterprisedb.com>
To: Daniel Verite <daniel@manitou-mail.org>
Cc: Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@postgresql.org
Date: 2025-10-03T06:14:38Z
Lists: pgsql-hackers
Thanks Daniel for the confirmation!

Looks like nothing more needed as the issue is already
reported with OCI.


Regards,
Nishant Sharma,
EDB, Pune.

On Thu, Oct 2, 2025 at 4:41 PM Daniel Verite <daniel@manitou-mail.org>
wrote:

>         Nishant Sharma wrote:
>
> > Testing sort order for '1' & 'a' using ICU library with collation =
> > 'ja-u-kr-latn-digit'
> >
> > With Method ucol_strcollUTF8():
> > SORT ORDER ASC : '1', 'a'
> >
> > With Method ucol_nextSortKeyPart() (i.e transform and memcmp):
> > SORT ORDER ASC : 'a', '1'
>
> Yes, ucol_strcoll() with kr-latn-digit has been flawed for a
> long time [1] and still is in the development branch of ICU.
>
> There's a recent ticket about this [2] with a reproducer similar
> to yours.
>
>
> [1]
>
> https://www.postgresql.org/message-id/flat/153201618542.1404.3611626898935613264%40wrigleys.postgresql.org
> [2] https://unicode-org.atlassian.net/browse/ICU-23016
>
>
> Best regards,
> --
> Daniel Vérité
> https://postgresql.verite.pro/
>