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https://issues.apache.org/jira/browse/HIVE-15397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15736456#comment-15736456
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Sergey Shelukhin edited comment on HIVE-15397 at 12/9/16 9:59 PM:
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Updated the out files, expanded one test to run with and without metadataonly
enabled to make sure results are consistent, fixed the typo.
was (Author: sershe):
Updated the out files, expanded one test to run with and without metadataonly
enable to make sure results are consistent, fixed the typo.
> metadata-only queries may return incorrect results with empty tables
> --------------------------------------------------------------------
>
> Key: HIVE-15397
> URL: https://issues.apache.org/jira/browse/HIVE-15397
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-15397.01.patch, HIVE-15397.patch
>
>
> Queries like select 1=1 from t group by 1=1 may return rows, based on
> OneNullRowInputFormat, even if the source table is empty. For now, add some
> basic detection of empty tables and turn this off by default (since we can't
> know whether a table is empty or not based on there being some files, without
> reading them).
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