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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-12602) Join Reordering: Pushing Inner Join Through Outer Join
Date Sat, 02 Jan 2016 04:21:39 GMT

    [ https://issues.apache.org/jira/browse/SPARK-12602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15076435#comment-15076435
] 

Apache Spark commented on SPARK-12602:
--------------------------------------

User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/10551

> Join Reordering: Pushing Inner Join Through Outer Join
> ------------------------------------------------------
>
>                 Key: SPARK-12602
>                 URL: https://issues.apache.org/jira/browse/SPARK-12602
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.6.0
>            Reporter: Xiao Li
>            Priority: Critical
>
> If applicable, we can push Inner Join through Outer Join. This can reduce the number
of rows since the Inner Join always can generate less rows than Outer Join. 
> This can improve the performance.



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