Github user dongjoon-hyun commented on the pull request:
https://github.com/apache/tajo/pull/439#issuecomment-89582611
I see. I agree with you on the purpose of Jira as a architectural design
discussion tools before implementation. For this trivial issue, it was not so
important. But if we move on Grouping Set issue, we need more discussion. Also,
now I understand your original recommendation to implement the execution logic
of the grouping set first. I will study the links (which you given) and read
related projects/materials and update this issue for discussion before
implementation. Thank you, @jihoonson. Always. :)
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