[jira] [Created] (HIVE-15818) Union of complex data types and NULL

[Paras Sethia (JIRA)]

Paras Sethia created HIVE-15818:
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             Summary: Union of complex data types and NULL
                 Key: HIVE-15818
                 URL: https://issues.apache.org/jira/browse/HIVE-15818
             Project: Hive
          Issue Type: Bug
          Components: Parser, Types
            Reporter: Paras Sethia


There is a possible bug in validation of union queries involving complex data 
types. The following query reproduces it:

SELECT array(1, 2) a UNION ALL SELECT NULL;

Error: Error while compiling statement: FAILED: SemanticException Schema of 
both sides of union should match: Column a is of type array<int> on first table 
and type void on second table. Cannot tell the position of null AST. 
(state=42000,code=40000)



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