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https://issues.apache.org/jira/browse/HIVE-13190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15200132#comment-15200132
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Sergey Shelukhin commented on HIVE-13190:
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Is it because it's using NullRow input format, and not OneRowNull... one?
> Vectorization: Dummy table row-limits get multiplied 100x accidentally
> ----------------------------------------------------------------------
>
> Key: HIVE-13190
> URL: https://issues.apache.org/jira/browse/HIVE-13190
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Affects Versions: 2.1.0
> Reporter: Gopal V
> Assignee: Matt McCline
>
> 100x more rows are produced from dummy tables.
> {code}
> hive> select count(1) from (select * from (Select 1 a) x order by x.a) y;
> 100
> Time taken: 0.913 seconds, Fetched: 1 row(s)
> hive>
> {code}
> simpler example.
> {code}
> hive> create temporary table dual as select 1;
> Table default.dual stats: [numFiles=1, numRows=100, totalSize=200,
> rawDataSize=100]
> OK
> Time taken: 1.482 seconds
> {code}
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