UUIDs

type

uuid

uuid

Universally Unique Identifiers (UUID).

For formal definition see RFC 4122 and ISO/IEC 9834-8:2005.

Every Object has a globally unique property id represented by a UUID value.

function

uuid_generate_v1mc()

std::uuid_generate_v1mc() -> uuid

Return a version 1 UUID.

The algorithm uses a random multicast MAC address instead of the real MAC address of the computer.

db>

select uuid_generate_v1mc();

{1893e2b6-57ce-11e8-8005-13d4be166783}

function

std::uuid_generate_v4()

std::uuid_generate_v4() -> uuid

Return a version 4 UUID.

The UUID is derived entirely from random numbers.

db>

select uuid_generate_v4();

{92673afc-9c4f-42b3-8273-afe0053f0f48}