[HIVE-15818] Union of complex data types and NULL

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Parser, Types
• Assignee: Unassigned
• Reporter: Paras Sethia
• Created: 06/Feb/17 04:33
• Updated: 02/Mar/17 15:59

Description

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)