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  1. Hive
  2. HIVE-16358

Push TOP N to Druid queries

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Query Planning, Query Processor
    • None

    Description

      After HIVE-15708 promotes Calcite to 1.12, TOP N queries over Druid tables will be implemented by GroupBy on Druid and then (sort and) Limit on Hive. The relevant changes on Calcite side are related to CALCITE-1578 and steam from fundamental semantic differences between Druid concept of TOP (ie. top within a GBy) vs. SQL TOP/LIMIT (ie. global).

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. CALCITE-1758 Push to Druid OrderBy/Limit operation over time dimension and additional columns

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

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-16121 Add flag to allow approximate results coming from Druid

          • Major - Major loss of function.
          • Open

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              rusanu Remus Rusanu
              rusanu Remus Rusanu
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              Dates

                Created:
                Updated: