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https://issues.apache.org/jira/browse/TAJO-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jihoon Son updated TAJO-1232:
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Attachment: TAJO-1232_2.patch
I have added comments on changes.
> Implicit groupby queries with LIMIT lead to wrong results.
> ----------------------------------------------------------
>
> Key: TAJO-1232
> URL: https://issues.apache.org/jira/browse/TAJO-1232
> Project: Tajo
> Issue Type: Bug
> Components: planner/optimizer
> Reporter: Hyunsik Choi
> Assignee: Jihoon Son
> Fix For: 0.10
>
> Attachments: TAJO-1232.patch, TAJO-1232_2.patch
>
>
> See the title. The following query will reproduce the problem.
> {code}
> SELECT sum(x) FROM T1 LIMIT 1;
> > 0
> {code}
> Regardless of the actual summation result, the query result always is 0.
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