Feat: Stored Procedures

[sparty02]

(I saw a comment on the README along the lines of supporting Callable statements. Assuming this is where you were heading with that?)

Maybe something like:

String state = db.
        .call("{call GetStateByZip(?)}")
        .parameter(90210)
        .getAs(String.class)
        .first().toBlocking().single();
System.out.println(state);  // California

Stored procedures would support named parameters, as already supported in other queries.

[davidmoten]

Seems fair enough. Maybe some basic support first for a use case like you show then later stuff like binding OUT parameters.

[sparty02]

Sounds good! Regarding OUT parameters, you could probably leverage the getAs(Class<?>...) part of the API right?