[jira] [Updated] (PIG-3133) Revamp algebraic interface to actually return classes

["Daniel Dai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-3133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dai updated PIG-3133:
----------------------------
    Fix Version/s:     (was: 0.15.0)
                   0.16.0

> 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: 0.16.0
>
>
> 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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