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From "Jonathan Coveney (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-3133) Revamp algebraic interface to actually return classes
Date Wed, 23 Jan 2013 00:50:13 GMT
Jonathan Coveney created PIG-3133:
-------------------------------------

             Summary: Revamp algebraic interface to actually return classes
                 Key: PIG-3133
                 URL: https://issues.apache.org/jira/browse/PIG-3133
             Project: Pig
          Issue Type: Improvement
            Reporter: Jonathan Coveney
             Fix For: 0.12


The current algebraic interface is a bit weird to work with. It would make a lot more sense
to let people return Class<? extends EvalFunc<Tuple>> or what have you, or even
a FuncSpec, but the current string based approach circumvents the whole point of using Java
and is annoying. I think we should have an abstract EFInitial, EFIntermediate, EFFinal which
implemented the exec function for the user, but in terms of a simpler, clearer interface.
This way if people really want the old way they can, but we can present them something less
ugly.

This would also be a good time to clarify the contracts of Algebraics and simplify them (the
initial function's "a tuple which contains a bag which contains 1 tuple" is super whack).

If anyone wants to work on this let me know because this is the sort of thing I will probably
bang out when procrastinating something else.

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