Hacker News Reader

If I understand correctly, AlloyDB is a Postgres compatible re-implementation, so there's no shared code. So this is a bit like Wine compared to Windows, only with the big corp re-implementing the OSS software instead of the other way round.

View on HN

OMG no, we didn't reimplement Postgres. Definitely started from the PG kernel and made modifications from there.

I often reference Cunningham‘s Law, and I’m glad it’s in full effect :)

Thank you for the clarification!

You can't really be 100% postgres compatible without borrowing a lot of implementation

Query and storage layer are nicely separated in the Postgres codebase, you can absolutely rip out the complete backend if you really want it.

There is a Postgres interface to Spanner which probably did that.

Reply on news.ycombinator.com