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https://issues.apache.org/jira/browse/HIVE-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480841#comment-13480841
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Shreepadma Venugopalan commented on HIVE-2794:
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SQL standard dictates that the return value should be NULL. However, HiveQL
seems to deviate and return an empty result set for other aggregate functions
as well. This needs to be fixed to achieve parity with the SQL standard.
> Aggregations without grouping should return NULL when applied to partitioning
> column of a partitionless table
> -------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-2794
> URL: https://issues.apache.org/jira/browse/HIVE-2794
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Carl Steinbach
> Assignee: Zhenxiao Luo
> Attachments: HIVE-2794.1.patch.txt
>
>
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