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  1. Spark
  2. SPARK-2436

Apply size-based optimization to planning BroadcastNestedLoopJoin

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Details

    • New Feature
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 1.1.0
    • SQL
    • None

    Description

      We should estimate the sizes of both the left side & right side, and make the smaller one the broadcast relation.

      As part of this task, BroadcastNestedLoopJoin needs to be slightly refactored to take a BuildSide into account.

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          depends upon

          New Feature - A new feature of the product, which has yet to be developed. SPARK-2393 Simple cost estimation and auto selection of broadcast join

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved
          incorporates

          Improvement - An improvement or enhancement to an existing feature or task. SPARK-2531 Make BroadcastNestedLoopJoin take into account a BuildSide

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          links to

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              ConcreteVitamin Zongheng Yang
              ConcreteVitamin Zongheng Yang
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              Dates

                Created:
                Updated:
                Resolved: