I wonder how EdgeDB talks to postgres. Does it speak the Postgres protocol and translate the queries, or is it more of a deeper integration in to the storage la

I wonder how EdgeDB talks to postgres. Does it speak the Postgres protocol and translate the queries, or is it more of a deeper integration in to the storage layer? Very interested in this! I've been wanting to build a generic HATEOAS server and this feels like this might be the right database!