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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/03/04 12:32:00 UTC

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

    [ https://issues.apache.org/jira/browse/SPARK-34620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17295253#comment-17295253 ] 

Apache Spark commented on SPARK-34620:
--------------------------------------

User 'c21' has created a pull request for this issue:
https://github.com/apache/spark/pull/31736

> 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
>            Priority: Minor
>
> `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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