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https://issues.apache.org/jira/browse/HIVE-124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Hammerbacher updated HIVE-124:
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Component/s: Query Processor
Adding to "Query Processor" component.
> aggregation on empty table should still return 1 row
> ----------------------------------------------------
>
> Key: HIVE-124
> URL: https://issues.apache.org/jira/browse/HIVE-124
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Zheng Shao
>
> The query "SELECT COUNT(1) FROM f_status_update fsu WHERE FALSE" should
> return a single row with value 0.
> Our code treat that query as "SELECT 1, COUNT(1) FROM f_status_update fsu
> WHERE FALSE GROUP BY 1", but these 2 queries are not equivalent because the
> second query will return empty result if the input is empty.
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