Gopal V created HIVE-16050:
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Summary: Regression: Union of null with non-null
Key: HIVE-16050
URL: https://issues.apache.org/jira/browse/HIVE-16050
Project: Hive
Issue Type: Bug
Components: Query Planning
Affects Versions: 2.2.0
Reporter: Gopal V
Fix For: 2.2.0
{code}
hive> select null as c1 union select 1 as c2;
FAILED: SemanticException Schema of both sides of union should match:
Column c1 is of type void on first table and type int on second table. Cannot
tell the position of null AST.
{code}
This looks related to HIVE-14251 which removed certain cases from the UNION
type coercion operations.
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