[ https://issues.apache.org/jira/browse/HIVE-15397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sergey Shelukhin updated HIVE-15397: ------------------------------------ Summary: metadata-only queries may return incorrect results with empty tables (was: metadata-only queries may return incorrect results with empty tables - I) > 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.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). -- This message was sent by Atlassian JIRA (v6.3.4#6332)