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  1. Spark
  2. SPARK-27815

Improve SQL optimizer's predicate pushdown performance for cascading joins

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.0.0
    • Fix Version/s: 3.0.0
    • Component/s: SQL
    • Labels:
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      Description

      The current catalyst optimizer's predicate pushdown is divided into two separate rules: PushDownPredicate and PushThroughJoin. This is not efficient for optimizing cascading joins such as TPC-DS q64, where a whole default batch is re-executed just due to this. We need a more efficient approach to pushdown predicate as much as possible in a single pass.

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            • Assignee:
              manifoldQAQ Yesheng Ma
              Reporter:
              manifoldQAQ Yesheng Ma
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                Updated:
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