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https://issues.apache.org/jira/browse/SPARK-12656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086782#comment-15086782
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Xiao Li commented on SPARK-12656:
---------------------------------

Starting it. Will submit a PR tonight. Thanks!

> Rewrite Intersect phyiscal plan using semi-join
> -----------------------------------------------
>
>                 Key: SPARK-12656
>                 URL: https://issues.apache.org/jira/browse/SPARK-12656
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Reynold Xin
>
> Our current Intersect physical operator simply delegates to RDD.intersect. We 
> should remove the Intersect physical operator and simply transform a logical 
> intersect into a semi-join. This way, we can take advantage of all the 
> benefits of join implementations (e.g. managed memory, code generation, 
> broadcast joins).



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