GitHub user cloud-fan opened a pull request:

    https://github.com/apache/spark/pull/19036

    [SPARK-21826][SQL] outer broadcast hash join should not throw NPE

    ## What changes were proposed in this pull request?
    
    This is a bug introduced by 
https://github.com/apache/spark/pull/11274/files#diff-7adb688cbfa583b5711801f196a074bbL274
 .
    
    Non-equal join condition should only be applied when the equal-join 
condition matches.
    
    ## How was this patch tested?
    
    regression test

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/cloud-fan/spark bug

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/19036.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #19036
    
----
commit 5d0548d3d3204f045b95df85f3941ce63f1b1974
Author: Wenchen Fan <wenc...@databricks.com>
Date:   2017-08-24T08:15:31Z

    outer broadcast hash join should not throw NPE

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