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Posted to issues@spark.apache.org by "Cheng Su (Jira)" <ji...@apache.org> on 2021/03/04 12:23:00 UTC

[jira] [Created] (SPARK-34620) Code-gen broadcast nested loop join (inner/cross)

Cheng Su created SPARK-34620:
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             Summary: Code-gen broadcast nested loop join (inner/cross)
                 Key: SPARK-34620
                 URL: https://issues.apache.org/jira/browse/SPARK-34620
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: Cheng Su


`BroadcastNestedLoopJoinExec` does not have code-gen, and we can potentially boost the CPU performance for this operator if we add code-gen for it. [https://databricks.com/blog/2017/02/16/processing-trillion-rows-per-second-single-machine-can-nested-loop-joins-fast.html] also showed the evidence in one fork.



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