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  1. Tajo (Retired)
  2. TAJO-950

Add distinct sort feature to sort operators

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Physical Operator
    • None

    Description

      Distinct sort physical operators are useful for 'SELECT DISTINCT' and some distinct aggregation statements. This feature enables the operator to eliminate the rows which have duplicated sort keys while sorting. It is very effective to reduce intermediate data, especially in the case where there are many duplicated sort keys.

      We need this feature. In terms of implementation approach, I'm expecting that distinct sort would be a flag for existing sort operators.

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            Unassigned Unassigned
            hyunsik Hyunsik Choi
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            Dates

              Created:
              Updated: