Alas, we have to wait until CockroachDB becomes a bit more capable SQL-wise. I gave a more elaborate answer in https://github.com/edgedb/edgedb/discussions/3403.
> That said, EdgeDB, the implementation, and EdgeQL, the language and the model, are different, and we encourage research into alternative EdgeQL implementations. We'll be releasing the formal EdgeQL spec and the graph-relational model whitepaper to make this easier.
Has the mentioned spec and model whitepaper been released?