| From: | "Andrey M(dot) Borodin" <x4mmm(at)yandex-team(dot)ru> |
|---|---|
| To: | Jelte Fennema-Nio <postgres(at)jeltef(dot)nl> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Aleksander Alekseev <aleksander(at)timescale(dot)com>, pgsql-hackers mailing list <pgsql-hackers(at)postgresql(dot)org>, Peter Eisentraut <peter(at)eisentraut(dot)org>, Sergey Prokhorenko <sergeyprokhorenko(at)yahoo(dot)com(dot)au>, Przemysław Sztoch <przemyslaw(at)sztoch(dot)pl>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Mat Arye <mat(at)timescaledb(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Nikolay Samokhvalov <samokhvalov(at)gmail(dot)com>, Junwang Zhao <zhjwpku(at)gmail(dot)com> |
| Subject: | Re: UUID v7 |
| Date: | 2024-07-20 11:46:23 |
| Message-ID: | B3512DC7-FDB0-4496-85F3-051711B8BF50@yandex-team.ru |
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| Lists: | pgsql-hackers |
> On 8 May 2024, at 18:37, Andrey M. Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
>
> It's RFC now.
PFA version with references to RFC instead of drafts.
In nearby thread [0] we found out that most systems have enough presicion to fill additional 12 bits of sub-millisecond information. So I switched implementation to this method.
We have a portable gettimeofday(), but unfortunately it gives only 10 bits of sub-millisecond information. So I created portable get_real_time_ns() for this purpose: it reads clock_gettime() on non-Windows platforms and GetSystemTimePreciseAsFileTime() on Windows.
Thanks!
Best regards, Andrey Borodin.
[0] https://www.postgresql.org/message-id/flat/be0339cc-1ae1-4892-9445-8e6d8995a44d%40eisentraut.org
| Attachment | Content-Type | Size |
|---|---|---|
| v25-0001-Implement-UUID-v7.patch | application/octet-stream | 14.7 KB |
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