Github user dongjoon-hyun commented on the pull request:
https://github.com/apache/spark/pull/12719#issuecomment-219782448
Ya. I was really flustrated, too. When you read the body of
`checkEvaluationWithOptimization` function above, it has the following lines.
It adds `Alias`.
```
val plan = Project(Alias(expression, s"Optimized($expression)")() :: Nil,
OneRowRelation)
val optimizedPlan = SimpleTestOptimizer.execute(plan)
```
Also, there exists other testsuite that fails. Is it possible to keep
`resolved` checking here?
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