Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/4186#issuecomment-71402394
I believe this will work, but seems a little hacky to me. A better way
probably is create a new expression node like MultiAlias. And since only single
UDTF expression is supported the SELECT clause, we'd better also add a semantic
checking in analyzer.
What do you think?
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