[jira] [Commented] (SPARK-13354) Push filter throughout outer join when the condition can filter out empty row

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-13354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15149923#comment-15149923 ] 

Apache Spark commented on SPARK-13354:
--------------------------------------

User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/11234

> Push filter throughout outer join when the condition can filter out empty row 
> ------------------------------------------------------------------------------
>
>                 Key: SPARK-13354
>                 URL: https://issues.apache.org/jira/browse/SPARK-13354
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>
> For a query
> {code}
> select * from a left outer join b on a.a = b.a where b.b > 10
> {code}
> The condition `b.b > 10` will filter out all the row that the b part of it is empty.
> In this case, we should use Inner join, and push down the filter into b.



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