Generate Random UUIDs Without An Extension

In other posts I've covered how to generate v4 random UUIDs in PostgreSQL using the uuid-ossp extension as well as the more up-to-date method of using the pgcrypto extension.

As of PostgreSQL v13, you no longer need to add an extension for v4 UUID generation. It comes built-in as the gen_random_uuid() function.

> select gen_random_uuid();
           gen_random_uuid
--------------------------------------
 0aa72fe6-ede7-4ccf-b328-348becc58066
(1 row)

If you need other non-v4 UUID functions, you'll have to stick with uuid-ossp.