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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-13903) Modify output nullability with constraints for Join operator
Date Tue, 15 Mar 2016 09:27:33 GMT

    [ https://issues.apache.org/jira/browse/SPARK-13903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15194994#comment-15194994
] 

Apache Spark commented on SPARK-13903:
--------------------------------------

User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/11722

> Modify output nullability with constraints for Join operator
> ------------------------------------------------------------
>
>                 Key: SPARK-13903
>                 URL: https://issues.apache.org/jira/browse/SPARK-13903
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Liang-Chi Hsieh
>
> With constraints and optimization, we can make sure some outputs of a Join operator are
not nulls. We should modify output nullability accordingly. We can use this information in
later execution to avoid null checking.



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