[SomeCallMeTim]

You can always handle it at the application level.

The trick is that it's better to have the extra guard rails. And all of Couchbase, Yugabase, and Citus support foreign keys even with sharding and replication, so that's not an issue when the DB supports it.

[SomeCallMeTim]

I said Couchbase above but meant CockroachDB. Brain fart, but can't edit the message now. :|