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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: UDAF documentation
Date Fri, 11 Mar 2011 02:18:09 GMT
On Thu, Mar 10, 2011 at 8:27 PM, Christopher, Pat
<patrick.christopher@hp.com> wrote:
> Hi Guys,
>
> I’m writing a UDAF to run against hive 0.5 or hive 0.7.  The documentation I
> can find says to implement UDAFEvaluator and ensure that you implement
> init() , aggregate() and evaluate().  However, all of the examples I can
> find implement init(), iterate(), merge(), terminatePartial() and
> terminate().
>
>
>
> What’s the difference and where I can find the documentation on how to write
> a UDAF?
>
>
>
> Thanks,
>
> Pat

At time the documentation may lag behind the code. I would checkout
the hive source code for the version you are working with and base
your work on other already existing UDAF's that are similar.

Edward

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