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From "Gopal V (JIRA)" <>
Subject [jira] [Created] (HIVE-16050) Regression: Union of null with non-null
Date Mon, 27 Feb 2017 19:18:45 GMT
Gopal V created HIVE-16050:

             Summary: Regression: Union of null with non-null 
                 Key: HIVE-16050
             Project: Hive
          Issue Type: Bug
          Components: Query Planning
    Affects Versions: 2.2.0
            Reporter: Gopal V
             Fix For: 2.2.0

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.

This looks related to HIVE-14251 which removed certain cases from the UNION type coercion

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