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https://issues.apache.org/jira/browse/FLINK-4231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434975#comment-15434975
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ASF GitHub Bot commented on FLINK-4231:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/2272
> Switch DistinctOperator from GroupReduce to Reduce
> --------------------------------------------------
>
> Key: FLINK-4231
> URL: https://issues.apache.org/jira/browse/FLINK-4231
> Project: Flink
> Issue Type: Improvement
> Components: Java API
> Affects Versions: 1.1.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
>
> As discussed in FLINK-3279, rewriting {{DistinctOperator}} to a
> {{ReduceFunction}} rather than the current {{GroupReduceFunction}} allows the
> user to set the {{CombineHint}} and choose a hash-based, sort-based, or no
> combiner.
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