Interesting, foreign key constraints typically make sharding harder, interesting to see them add support for some type of fkey constraint (even though it's same

Interesting, foreign key constraints typically make sharding harder, interesting to see them add support for some type of fkey constraint (even though it's same-shard only) to the db. I wonder how it impacts use-cases like vreplication/online DDL - I suppose you have to be careful with the exact semantics of the fkeys.