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Posted to issues@spark.apache.org by "Yesheng Ma (JIRA)" <ji...@apache.org> on 2019/06/25 01:41:00 UTC

[jira] [Created] (SPARK-28155) Improve SQL optimizer's predicate pushdown performance for cascading joins

Yesheng Ma created SPARK-28155:
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             Summary: Improve SQL optimizer's predicate pushdown performance for cascading joins
                 Key: SPARK-28155
                 URL: https://issues.apache.org/jira/browse/SPARK-28155
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Yesheng Ma


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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