Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/543#issuecomment-94265811
We need to have some discussion on this feature. In this case, as
@dongjoon-hyun said, the column in the order-by clause can be identified as the
column in the select clause. However, IMO, we need have a general rule to
handle this issue. Do you guys have any knowledge about the well-know rules?
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