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  1. Hive
  2. HIVE-1938

Cost Based Query optimization for Joins in Hive

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Duplicate
    • None
    • None
    • Query Processor, Statistics
    • None
    • *nix,java

    • Query optimization . Query processor

    Description

      Current optimization in Hive is just rule-based and involves applying a set of rules on the Plan tree. This depends on hints given by the user (which may or may-not be correct) and might result in execution of costlier plans.So this jira aims at building a cost-model which can give a good estimate various plans before hand (using some meta-data already collected) and we can choose the best plan which incurs the least cost.

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              bharathv Bharath Vissapragada
              bharathv Bharath Vissapragada
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              Dates

                Created:
                Updated:
                Resolved: