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https://issues.apache.org/jira/browse/TAJO-572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14518823#comment-14518823
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Atri Sharma commented on TAJO-572:
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Thanks a ton!
> In an aggregation query, all expressions must appear in the GROUP BY clause
> or be used in an aggregate function
> ---------------------------------------------------------------------------------------------------------------
>
> Key: TAJO-572
> URL: https://issues.apache.org/jira/browse/TAJO-572
> Project: Tajo
> Issue Type: Sub-task
> Components: planner/optimizer
> Reporter: Hyunsik Choi
> Assignee: Atri Sharma
>
> The validation check rule is as follows:
> Condition:
> * All query blocks which have an aggregation regardless of implicit or
> explicit group-by
> Rule:
> * All expressions must appear in the GROUP BY clause or be used in an
> aggregate function.
> * But, constant value is allowed.
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