Horton

Re: UUID v7

Marcos Pegoraro <marcos@f10.com.br>

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From: Marcos Pegoraro <marcos@f10.com.br>
To: "Andrey M. Borodin" <x4mmm@yandex-team.ru>
Cc: Aleksander Alekseev <aleksander@timescale.com>, pgsql-hackers mailing list <pgsql-hackers@postgresql.org>, Nikolay Samokhvalov <nik@postgres.ai>, "David G. Johnston" <david.g.johnston@gmail.com>, Przemysław Sztoch <przemyslaw@sztoch.pl>, Sergey Prokhorenko <sergeyprokhorenko@yahoo.com.au>, Jelte Fennema-Nio <postgres@jeltef.nl>, Nick Babadzhanian <pgnickb@gmail.com>, Mat Arye <mat@timescaledb.com>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Tom Lane <tgl@sss.pgh.pa.us>, Daniel Gustafsson <daniel@yesql.se>, Matthias van de Meent <boekewurm+postgres@gmail.com>, Nikolay Samokhvalov <samokhvalov@gmail.com>, "Kyzer Davis (kydavis)" <kydavis@cisco.com>, Andres Freund <andres@anarazel.de>, "brad@peabody.io" <brad@peabody.io>, Kirk Wolak <wolakk@gmail.com>
Date: 2024-01-24T17:00:52Z
Lists: pgsql-hackers 
 Is enough from 1970 ?
How about if user wants to have an UUID of his birth date ?

regards
Marcos

Em qua., 24 de jan. de 2024 às 13:54, Andrey M. Borodin <
x4mmm@yandex-team.ru> escreveu:

>
>
> > On 24 Jan 2024, at 20:46, Aleksander Alekseev <aleksander@timescale.com>
> wrote:
> >
> > Only the
> > fact that timestamp from the far past generates UUID from the future
> > bothers me.
>
> PFA implementation of guard checks, but I'm afraid that this can cause
> failures in ID generation unexpected to the user...
> See tests
>
> +-- errors in edge cases of UUID v7
> +SELECT 1 FROM uuidv7('1970-01-01 00:00:00+00'::timestamptz - interval
> '0ms');
> +SELECT uuidv7('1970-01-01 00:00:00+00'::timestamptz - interval '1ms'); --
> ERROR expected
> +SELECT 1 FROM
> uuidv7(uuid_extract_time('FFFFFFFF-FFFF-7FFF-B000-000000000000'));
> +SELECT
> uuidv7(uuid_extract_time('FFFFFFFF-FFFF-7FFF-B000-000000000000')+'1ms'); --
> ERROR expected
>
> Range is from 1970-01-01 00:00:00 to 10889-08-02 05:31:50.655. I'm not
> sure we should give this information in error message...
> Thanks!
>
>
> Best regards, Andrey Borodin.
>

Commits

  1. Fix timestamp overflow in UUIDv7 implementation.

  2. Add UUID version 7 generation function.

  3. Add some UUID support functions