database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-16 17:07:43 +03:00
Code Activity

Fix constant when extracting timestamp from UUIDv7.

Browse Source 
When extracting a timestamp from a UUIDv7, a conversion from
milliseconds to microseconds was using the incorrect constant
NS_PER_US instead of US_PER_MS. Although both constants have the same
value, this fix improves code clarity by using the semantically
correct constant.

Backpatch to v18, where UUIDv7 was introduced.

Author: Erik Nordström <erik@tigerdata.com>
Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/CACAa4V+i07eaP6h4MHNydZeX47kkLPwAg0sqe67R=M5tLdxNuQ@mail.gmail.com
Backpatch-through: 18
This commit is contained in:
Masahiko Sawada
2025-08-15 11:58:53 -07:00
parent 2e2e7ff7b8
commit 37265ca01f
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/backend/utils/adt/uuid.c
View File

@@ -748,7 +748,7 @@ uuid_extract_timestamp(PG_FUNCTION_ARGS)
+ (((uint64) uuid->data[0]) << 40);
/* convert ms to us, then adjust */
ts = (TimestampTz) (tms * NS_PER_US) -
ts = (TimestampTz) (tms * US_PER_MS) -
(POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY * USECS_PER_SEC;
PG_RETURN_TIMESTAMPTZ(ts);