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Posted to issues@spark.apache.org by "Wenchen Fan (JIRA)" <ji...@apache.org> on 2016/04/29 09:33:12 UTC

[jira] [Updated] (SPARK-12660) Rewrite except using anti-join

     [ https://issues.apache.org/jira/browse/SPARK-12660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan updated SPARK-12660:
--------------------------------
    Assignee: Xiao Li

> Rewrite except using anti-join
> ------------------------------
>
>                 Key: SPARK-12660
>                 URL: https://issues.apache.org/jira/browse/SPARK-12660
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Xiao Li
>             Fix For: 2.0.0
>
>
> Similar to SPARK-12656, we can rewrite except in the logical level using anti-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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