Joints and joins I think once you learned a joint program like with us. You have actually two options. So either you would expose like joint dimension interview and basically do the joins inside your sequel where you query. And then you need to basically solve the cosmic threat problem which is by itself like worry, worry, hardproblem to solve. Or you can incorporate your joints and views but you end up with a combinatorial explosion. That's something that becomes very unmanageable pretty quickly.