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  1. Hive
  2. HIVE-14473 Druid integration II
  3. HIVE-16816

Chained Group by support for druid.

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    • Sub-task
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Druid integration
    • None

    Description

      This is more likely to be a calcite enhancement but am logging it here to track it any way.
      Currently queries like 

       select count (distinct dim) from table

      is pushed partially to druid as group by dim followed by a count executed by hive QE. This can be enhanced by using the nested (eg chained execution) group by query such as the first (inner) GB query does group by key and the second (outer) does the count.

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          Dependency

          Bug - A problem which impairs or prevents the functions of the product. CALCITE-1822 Push Aggregate that follows Aggregate down to Druid

          • Major - Major loss of function.
          • Open

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              bslim Slim Bouguerra
              bslim Slim Bouguerra
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              Dates

                Created:
                Updated: