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  1. Hive
  2. HIVE-4244 Make string dictionaries adaptive in ORC
  3. HIVE-4324

ORC Turn off dictionary encoding when number of distinct keys is greater than threshold

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Details

    • Sub-task
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.11.0
    • 0.12.0
    • File Formats
    • None

    Description

      Add a configurable threshold so that if the number of distinct values in a string column is greater than that fraction of non-null values, dictionary encoding is turned off.

      Attachments

        1. HIVE-4324.D12045.3.patch
          39 kB
          Phabricator
        2. HIVE-4324.D12045.2.patch
          39 kB
          Phabricator
        3. HIVE-4324.D12045.2.patch
          39 kB
          Owen O'Malley
        4. HIVE-4324.D12045.1.patch
          38 kB
          Phabricator
        5. HIVE-4324.1.patch.txt
          73 kB
          Kevin Wilfong

        Activity

          People

            kevinwilfong Kevin Wilfong
            kevinwilfong Kevin Wilfong
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            Dates

              Created:
              Updated:
              Resolved: