holdenk created SPARK-21436:

             Summary: Take advantage of known partioner for distinct on RDDs
                 Key: SPARK-21436
                 URL: https://issues.apache.org/jira/browse/SPARK-21436
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.3.0
            Reporter: holdenk
            Priority: Minor

If we have a known partitioner we should be able to avoid the shuffle.

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