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Posted to issues@spark.apache.org by "Zhenhua Wang (JIRA)" <ji...@apache.org> on 2017/09/11 12:19:00 UTC

[jira] [Commented] (SPARK-17079) broadcast decision based on cbo

    [ https://issues.apache.org/jira/browse/SPARK-17079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16161136#comment-16161136 ] 

Zhenhua Wang commented on SPARK-17079:
--------------------------------------

This is inherently done in SparkStrategies.

> broadcast decision based on cbo
> -------------------------------
>
>                 Key: SPARK-17079
>                 URL: https://issues.apache.org/jira/browse/SPARK-17079
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Optimizer
>    Affects Versions: 2.0.0
>            Reporter: Ron Hu
>
> We decide if broadcast join should be used based on the cardinality and size of join input side rather than the initial size of the join base relation. 



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