Github user dongjoon-hyun commented on the pull request:
https://github.com/apache/tajo/pull/543#issuecomment-94582003
Hi, @jihoonson . I found that that was a bug of `addColumn` ( TAJO-1573 ).
Please see the change of https://github.com/apache/tajo/pull/545 .
It causes `getNaturalJoinCondition`, `verifyProjectedFields`,
`verifyIfTargetsCanBeEvaluated` bugs, too. So the theme is different, we had
better handle those different issues in a different issue.
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