[solicode]

I like ordered UUIDs, but if you care about 100% strict and accurate ordering you need to be careful about generating them in app code vs. on the DB side. With the former + using multiple app servers, server clock drift can become an issue. Which is why I still generate my ordered UUIDs on my Postgres server. It means writing some funky PL/pgSQL (or however you decide to do it... I think you can run Python too), but it gets the job done.

I wish ordered UUIDs were built-in to more DBs natively. I remember seeing UUIDv6 being proposed, but I don't know if/when that will be standardised.

[httgp]

How does one generate ordered UUIDs right on the PostgreSQL server?

[Tostino]

Use this: https://github.com/tvondra/sequential-uuids

If you cannot install extensions, I just wrote a PL/PGSQL implementation for the time-based generator I could share.

[Sytten]

Please do I have been looking for that. Posting it in the repo would help a few people k am guessing.

[Tostino]

https://gist.github.com/Tostino/ca104bff40e704b6db70b9af4926...

Posted it to the repo as well.

[solicode]

There's probably a nicer way (or more performant at least), but I created a function that uses the built-in `uuid_generate_v1mc` and then reverse the order of the time component so that high values come first.