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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-12656) Rewrite Intersect phyiscal plan using semi-join
Date Thu, 07 Jan 2016 05:49:39 GMT

     [ https://issues.apache.org/jira/browse/SPARK-12656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-12656:
------------------------------------

    Assignee: Apache Spark

> 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
>            Assignee: Apache Spark
>
> 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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