intractable

The [RouteGuide](http://www.grpc.io/docs/tutorials/basic/go.html) program from the GRPC tutorials is useful because it demonstrates all of the streaming modes and some async stream interactions. It'd likely help bring new `grpc-haskell` users up...

Support for the `ANY` operator?

7

Thanks for the fantastic library, I have been enjoying using it to adapt a bunch of code from handrolled SQL via `postgresql-simple`. I have a SQL query that does something...