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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-984) Distinct operator for POJO DataSets without KeySelector and on UnsortedGrouping
Date Mon, 01 Dec 2014 09:12:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14229568#comment-14229568
] 

ASF GitHub Bot commented on FLINK-984:
--------------------------------------

Github user rmetzger commented on the pull request:

    https://github.com/apache/incubator-flink/pull/245#issuecomment-65037108
  
    Okay, I'll merge it.


> Distinct operator for POJO DataSets without KeySelector and on UnsortedGrouping
> -------------------------------------------------------------------------------
>
>                 Key: FLINK-984
>                 URL: https://issues.apache.org/jira/browse/FLINK-984
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Ufuk Celebi
>            Assignee: Robert Metzger
>            Priority: Minor
>
> Two issues regarding the distinct operator:
> - The distinct operator does not support {{distinct()}} with POJO datasets. I think it
should be possible to implement a reflection based KeySelector which selects all public fields
as key?
> - All other grouped operators work by {{groupBy(GROUPING).operator(...)}} whereas the
distinct operator does {{distinct(GROUPING)}}. I think it would be more consistent to allow
{{groupBy(GROUPING).distinct()}}.



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