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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1622) Add GroupReducePartial Operator
Date Tue, 10 Mar 2015 15:20:38 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14355040#comment-14355040
] 

ASF GitHub Bot commented on FLINK-1622:
---------------------------------------

Github user mxm commented on the pull request:

    https://github.com/apache/flink/pull/466#issuecomment-78076027
  
    @aljoscha Thanks for the comments. I agree, the tests are a bit shady because they test
the operator by first performing a partial, then a full reduce. Using a custom partitioner
would make more sense.
    
    @hsaputra Yes, we absolutely have to add docs apart from the Java/Scala docs.
    
    What do you think about the name? @fhueske suggested to expose the operator as `combine`
because it is essentially a user-accessible combiner..


> Add GroupReducePartial Operator
> -------------------------------
>
>                 Key: FLINK-1622
>                 URL: https://issues.apache.org/jira/browse/FLINK-1622
>             Project: Flink
>          Issue Type: Sub-task
>    Affects Versions: 0.9
>            Reporter: Aljoscha Krettek
>
> This does what a Reduce or GroupReduce Operator does, except it is only performed on
a local partition.
> This is also similar to an explicit combine that can output a type that is different
from the input.



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