Github user hvanhovell commented on the issue:
https://github.com/apache/spark/pull/14899
@nsyca this is a good catch.
Technically the analyzer creates a correctly analyzed plan. It is the
optimizer that breaks it. However I do think we need to fix this in the
analyzer.
Your current approach is to alias every project in a subquery alias, that
happens in a lot of places. We can be a bit more subtle here, by focussing on
the subquery expression. We could just generalize the code in the
`rewriteSubQuery` to always add a project. Could you take a look at this?
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