[quizotic]

Glad to hear about the FDWs ... but wouldn't foreign keys be your friend here? What else would you need, really, to layer this on an existing DB?

[RedCrowbar]

If your schema consistently uses synthetic primary keys, maybe like the ones produced by some active record ORMs, then, yes. Theoretically, we could make an adapter that would make EdgeDB "understand" Django schemas, for example.