GitHub user viirya opened a pull request:

    https://github.com/apache/spark/pull/14682

    [SPARK-17104][SQL] LogicalRelation.newInstance should follow the semantics 
of MultiInstanceRelation

    ## What changes were proposed in this pull request?
    
    Currently `LogicalRelation.newInstance()` simply creates another 
`LogicalRelation` object with the same parameters. However, the `newInstance()` 
method inherited from `MultiInstanceRelation` should return a copy of unique 
expression ids. Current `LogicalRelation.newInstance()` causes failure when 
doing self-join.
    
    ## How was this patch tested?
    
    Jenkins tests.

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

    $ git pull https://github.com/viirya/spark-1 fix-localrelation

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

    https://github.com/apache/spark/pull/14682.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 #14682
    
----
commit f9a8c763a8b45e467566a973b7894aaecb9248d4
Author: Liang-Chi Hsieh <sim...@tw.ibm.com>
Date:   2016-08-17T08:49:07Z

    Fix LogicalRelation.newInstance.

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