Investigate changes in PM-1938: Approximate count distinct accumulator

XMLWordPrintableJSON

    • Type: Epic
    • Resolution: Won't Do
    • Priority: Major - P3
    • None
    • Component/s: None
    • None
    • None
    • None
    • None
    • None
    • None
    • $i18n.getText("admin.common.words.hide")
      Key Status/Resolution FixVersion
      CSHARP-3224 Blocked
      JAVA-3864 Blocked
      $i18n.getText("admin.common.words.show")
      #scriptField, #scriptField *{ border: 1px solid black; } #scriptField{ border-collapse: collapse; } #scriptField td { text-align: center; /* Center-align text in table cells */ } #scriptField td.key { text-align: left; /* Left-align text in the Key column */ } #scriptField a { text-decoration: none; /* Remove underlines from links */ border: none; /* Remove border from links */ } /* Add green background color to cells with FixVersion */ #scriptField td.hasFixVersion { background-color: #00FF00; /* Green color code */ } #scriptField td.willNotDo { background-color: #FF0000; /* Red color code */ } /* Center-align the first row headers */ #scriptField th { text-align: center; } Key Status/Resolution FixVersion CSHARP-3224 Blocked JAVA-3864 Blocked
    • None
    • None
    • None
    • None
    • None
    • None

      Downstream Change Summary

      Specific downstream impact TBD.

      Description of Linked Ticket

      Epic Summary

      Summary

      Add an approximate count distinct accumulator.

      Motivation

      Exact count distinct (PM-1936) is an important analytical tool but it is computationally expensive (see Appendix in here). Therefore, users often prefer to use an approximate statistic that can be applied to large volumes of data. This effort will also pave the way to support approximate count distinct in on-demand materialized views, as the exact count distinct accumulator cannot easily be incremented.

      Cast of Characters

      • Product Owner: Katya Kameniava
      • Project Lead: Pawel Terlecki
      • Program Manager: Craig Homa
      • Drivers Contact:

      Documentation

      Scope Document
      Technical Design Document
      Product Description

            Assignee:
            Unassigned
            Reporter:
            Backlog - Core Eng Program Management Team
            None
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

              Created:
              Updated:
              Resolved:
              None
              None
              None
              None
              None
              None