Re: UUID v7

x4mmm@yandex-team.ru

From: "Andrey M. Borodin" <x4mmm@yandex-team.ru>

To: Masahiko Sawada <sawada.mshk@gmail.com>

Cc: Sergey Prokhorenko <sergeyprokhorenko@yahoo.com.au>, Jelte Fennema-Nio <postgres@jeltef.nl>, Michael Paquier <michael@paquier.xyz>, Aleksander Alekseev <aleksander@timescale.com>, pgsql-hackers mailing list <pgsql-hackers@postgresql.org>, Peter Eisentraut <peter@eisentraut.org>, Przemysław Sztoch <przemyslaw@sztoch.pl>, "David G. Johnston" <david.g.johnston@gmail.com>, Mat Arye <mat@timescaledb.com>, Matthias van de Meent <boekewurm+postgres@gmail.com>, Nikolay Samokhvalov <samokhvalov@gmail.com>, Junwang Zhao <zhjwpku@gmail.com>, Stepan Neretin <sncfmgg@gmail.com>

Date: 2024-11-23T08:20:28Z

Lists: pgsql-hackers

Attachments

v37-0001-Implement-UUID-v7.patch (application/octet-stream) patch v37-0001
v37-0002-Mix-in-2-bits-of-entropy-into-timestampt-of-UUID.patch (application/octet-stream) patch v37-0002


> On 23 Nov 2024, at 10:58, Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> 
> I've attached an updated patch that squashed changes I made for v33.
> We're still discussing increasing entropy on Windows and macOS, but
> the patch seems to be in good shape.

+1, thanks!

PFA version with improved comment.

Sergey Prokhorenko just draw my attention to the new release of MariaDB [0]. They are doing very similar UUID v7 generation as we do [1].


Best regards, Andrey Borodin.


[0] https://mariadb.com/resources/blog/announcing-mariadb-community-server-11-7-rc-with-vector-search-and-11-6-ga/
[1] https://github.com/mariadb/server/blob/main/plugin/type_uuid/sql_type_uuid_v7.h#L32

Commits

Fix timestamp overflow in UUIDv7 implementation.
- a5419bc72e22 18.0 landed
Add UUID version 7 generation function.
- 78c5e141e9c1 18.0 landed
Add some UUID support functions
- 794f10f6b920 17.0 landed