I've been using this fairly heavily recently (internal to Google), to the point where I'm thinking of investing in writing an org-babel mode for it. It's a really nice way to structure queries!

Oh wow that is neat!

And yes, this kind of thing is why datalog is a lot more amenable to fast query plans & runtimes than prolog. This part is especially cool: https://github.com/EvgSkv/logica/blob/main/compiler/dialects...