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https://issues.apache.org/jira/browse/TAJO-805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984158#comment-13984158
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Hyoungjun Kim commented on TAJO-805:
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Fixed that Constant Node doesn't use existing reference.
Please review this patch.
> Multiple constant in selection emits some columns.
> --------------------------------------------------
>
> Key: TAJO-805
> URL: https://issues.apache.org/jira/browse/TAJO-805
> Project: Tajo
> Issue Type: Bug
> Reporter: Hyoungjun Kim
> Assignee: Hyoungjun Kim
> Priority: Trivial
> Attachments: TAJO-805.patch
>
>
> The following query that has 3 constants prints out only 2 columns.
> {noformat}
> default> select '##' as a1, '##' as a2, '##' as a3 from nation;
> a1, a2
> -------------------------------
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> ##, ##
> {noformat}
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