Github user zhichao-li commented on the pull request:
https://github.com/apache/spark/pull/8811#issuecomment-142159010
@chenghao-intel, ` UnresolvedAttribute.parseAttributeName` still lack the
ability to solve case like this: ``name``, so we cannot add the back tick to
all cases which will do if you make the changes in `Column`. Here I'm supposing
the original field name should not containing any back-tick.
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