Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/11050#issuecomment-179528336
I guess the PR you mentioned is https://github.com/apache/spark/pull/8231
I think we should disallow users to accidentally use the internally
generated names. Thus, adding the following test case to verify if the fix
works well.
```
errorTest(
"unresolved attributes with a generated name",
testRelation2.groupBy('a)(max('b))
.where(sum('b) > 0)
.orderBy('havingCondition.asc),
"cannot resolve" :: "havingCondition" :: Nil)
```
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