Functions / Uuid Functions

uuid_extract_version

Extracts the version from a UUID of one of the variants described by RFC 9562.

Reading PG 18current·documented in 4 of 27 versions, 17 to 20

7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4 9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19 20

Signatures & examples

uuid_extract_version ( uuid ) → smallint

Extracts the version from a UUID of one of the variants described by RFC 9562. For other variants, this function returns null. For example, for a UUID generated by gen_random_uuid(), this function will return 4.

uuid_extract_version('41db1265-8bc1-4ab3-992f-885799a4af1d'::uuid) → 4

uuid_extract_version('019535d9-3df7-79fb-b466-fa907fa17f9e'::uuid) → 7

Version history 2

17 → 18 changed
16 → 17 added

Definition snapshot: 2026-09-14T13:14:25.684213+00:00@99e6866c · English manual source