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  1. Kylin
  2. KYLIN-3453

Improve cube size estimation for TOPN, COUNT DISTINCT

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • v2.5.0
    • None
    • None

    Description

      Currently, Kylin has poor cube size estimation for TOPN, COUNT DISTINCT. We should improve it, then we can get a reasonable split num when cube building. 

      Attachments

        1. image-2018-07-24-16-29-07-359.png
          42 kB
          Chao Long
        2. image-2018-07-24-16-30-50-804.png
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          Chao Long
        3. image-2018-07-24-16-33-43-231.png
          46 kB
          Chao Long
        4. image-2018-07-24-16-37-09-199.png
          38 kB
          Chao Long
        5. image-2018-07-24-17-11-26-283.png
          66 kB
          Chao Long
        6. image-2018-07-24-17-11-27-829.png
          66 kB
          Chao Long
        7. image-2018-07-24-17-12-25-880.png
          46 kB
          Chao Long

        Issue Links

          is related to

          Improvement - An improvement or enhancement to an existing feature or task. KYLIN-3926 Should set sourceRecordCount when updating statistics

          • Major - Major loss of function.
          • Closed
          links to

          Web Link GitHub Pull Request #172

          Activity

            People

              Wayne0101 Chao Long
              Wayne0101 Chao Long
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              Dates

                Created:
                Updated:
                Resolved: