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From ChengXiangLi <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-3474] support partial aggregate
Date Wed, 02 Mar 2016 10:54:44 GMT
Github user ChengXiangLi commented on the pull request:

    Hi, @fhueske , i've update the PR based on your comments, except object reusing in  `AggregateGroupCombineFunction`.
I found `GroupReduceOperator` would transform it into `CombineToGroupCombineWrapper` which
does not implement a rich user function. so we can not initiate the reusing object in `open()`.
I think we need add a `RichCombineToGroupCombineWrapper` which used to wrap rich combinable
GroupReduceFunction like 'AggregateGroupCombineFunction'. what do you think?

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