Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/10052#issuecomment-163811108
We should probably throw an `AnalysisException` for this if they use a
column ordinal that refers to an aggregate expression. The fact that we make
it all the way to the execution is pretty confusing to a user.
Regarding the test, we can probably remove it.
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