So something like a language server, but connected to a database and able to execute queries? That's an interesting idea.

While working on the compiler, I try to separate different components so things like this are possible. Currently, we are focusing on the language itself and also put some though into intermediate representation of the query (RQ - relational query). We are conservative about expanding the scope, because building database connectors and execution engines would take too much focus off the language and the compiler.

But I'd lie if I said that I don't want to dig into it.