Interesting approach! I've been working on it from the other angle: having panda...

Interesting approach! I've been working on it from the other angle: having pandas code generate SQL. If you're interested in checking it out, happy to try and show how it would generate the query in your readme!

https://github.com/machow/siuba

One thing I was wondering about the gnarly ast stuff you mention, what about operator overloading? E.g. Q("Select a from" + subquery + "where a < 1")