Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/18865
In that case, the current fix does not cover when selecting few column
together - https://github.com/apache/spark/pull/18865#issuecomment-326865161.
Why wouldn't we block all cases, or document this if this does not work by
design?
What I am not sure is, why this case alone should be disallowed. If
practically this case is special, I thought we could also parse all columns as
suggested initially. Sure, disallowing this alone is an option but it sounds
rather aggresive and band-aid to me.
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