Jonathan Coveney created PIG-3133:
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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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