[jira] [Created] (FLINK-4231) Switch DistinctOperator from GroupReduceFunction to ReduceFunction

[Shang Yuanchun (Jira)]

Greg Hogan created FLINK-4231:
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             Summary: Switch DistinctOperator from GroupReduceFunction to ReduceFunction
                 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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