Kevin Wilfong created HIVE-3544:
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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
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