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  1. Hive
  2. HIVE-4160 Vectorized Query Execution in Hive
  3. HIVE-5757

Implement vectorized support for CASE

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Implemented
    • 0.13.0
    • 0.13.0
    • None
    • None

    Description

      Implement support for CASE in vectorized mode. The approach is to use the vectorized UDF adaptor internally. A higher-performance version that used VectorExpression subclasses was considered but not done due to complexity. Such a version potentially could be done in the future if it's important enough.

      This is high priority because CASE is a fairly popular expression.

      Attachments

        1. HIVE-5757.4.patch
          8 kB
          Eric N. Hanson
        2. HIVE-5757.3.patch
          8 kB
          Eric N. Hanson
        3. HIVE-5757.2.patch
          4 kB
          Eric N. Hanson
        4. HIVE-5757.1.patch
          6 kB
          Eric N. Hanson

        Issue Links

          contains

          Sub-task - The sub-task of the issue HIVE-5920 Implement vectorized support for CASE WHEN a THEN b [WHEN c THEN d]* [ELSE e] END

          • Major - Major loss of function.
          • Resolved
          is related to

          Sub-task - The sub-task of the issue HIVE-5920 Implement vectorized support for CASE WHEN a THEN b [WHEN c THEN d]* [ELSE e] END

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              ehans Eric N. Hanson
              ehans Eric N. Hanson
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              Dates

                Created:
                Updated:
                Resolved: