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  1. Spark
  2. SPARK-19655

select count(*) , requests 1 for each row

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Details

    • Bug
    • Status: Resolved
    • Minor
    • Resolution: Duplicate
    • 2.1.0
    • None
    • SQL
    • None

    Description

      when I want query select count( * ) by JDBC and monitor queries in database side, I see spark requests: select 1 for destination table
      it means 1 for each row and it is not optimized

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          duplicates

          Improvement - An improvement or enhancement to an existing feature or task. SPARK-12449 Pushing down arbitrary logical plans to data sources

          • Major - Major loss of function.
          • Resolved

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              Unassigned Unassigned
              hosein_ey hosein
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              Dates

                Created:
                Updated:
                Resolved: