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  1. Spark
  2. SPARK-12077

Use more robust plan for single distinct aggregation

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.6.0
    • Fix Version/s: 1.6.0
    • Component/s: SQL

      Description

      Use try to match the behavior for single distinct aggregation with Spark 1.5, but that's not scalable, we should be robust by default, have a flag to address performance regression for low cardinality aggregation.

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              • Assignee:
                davies Davies Liu
                Reporter:
                davies Davies Liu
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                • Created:
                  Updated:
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