Kevin Wilfong created HIVE-3544: ----------------------------------- Summary: union involving double column with a map join subquery will fail or give wrong results Key: HIVE-3544 URL: https://issues.apache.org/jira/browse/HIVE-3544 Project: Hive Issue Type: Bug Components: Query Processor Affects Versions: 0.10.0 Reporter: Kevin Wilfong
The following query fails: select * from (select cast(a.key as bigint) as key from src a join src b on a.key = b.key union all select cast(key as double) as key from src)a The following query gives wrong results: select * from (select cast(a.key as bigint) as key, cast(b.key as double) as value from src a join src b on a.key = b.key union all select cast(key as double) as key, cast(key as string) as value from src)a But the following query runs fine: select * from (select cast(a.key as bigint) as key from src a union all select cast(key as double) as key from src)a -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira