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  1. Hive
  2. HIVE-5775 Introduce Cost Based Optimizer to Hive
  3. HIVE-6439

Introduce CBO step in Semantic Analyzer

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    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Invalid
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
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      Description

      This patch introduces CBO step in SemanticAnalyzer. For now the CostBasedOptimizer is an empty shell.
      The contract between SemAly and CBO is:

      • CBO step is controlled by the 'hive.enable.cbo.flag'.
      • When true Hive SemAly will hand CBO a Hive Operator tree (with operators annotated with stats). If it can CBO will return a better plan in Hive AST form.

        Attachments

        1. HIVE-6439.5.patch
          15 kB
          Harish Butani
        2. HIVE-6439.4.patch
          15 kB
          Harish Butani
        3. HIVE-6439.2.patch
          15 kB
          Harish Butani
        4. HIVE-6439.1.patch
          14 kB
          Harish Butani

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            • Assignee:
              rhbutani Harish Butani
              Reporter:
              rhbutani Harish Butani
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              • Created:
                Updated:
                Resolved: