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  1. Apache Drill
  2. DRILL-335

Implement hash aggregation operator for grouped aggregation

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.4.0
    • Component/s: None
    • Labels:
      None

      Description

      Placeholder for doing design and implementation of hash based aggregation in Drill. Currently, it supports sort based aggregation. Hash aggregation involves building a hash table on the grouping columns and maintaining workspace for each of the aggregate functions in the query. This issue will focus on non-distinct aggregation for now (i.e aggregate function does not contain DISTINCT). A separate issue will be created to track distinct aggregation.

        Attachments

        1. Drill-335-1.patch
          196 kB
          Aman Sinha
        2. Drill-335-2.patch
          205 kB
          Aman Sinha
        3. DrillAggrs.pdf
          127 kB
          Aman Sinha

          Activity

            People

            • Assignee:
              amansinha100 Aman Sinha
              Reporter:
              amansinha100 Aman Sinha
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              Dates

              • Created:
                Updated:
                Resolved: