> 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)
Might be a bug in the union validation > SELECT CAST (NULL as array<int>); Error: Error while compiling statement: FAILED: ParseException line 1:21 cannot recognize input near 'array' '<' 'int' in primitive type specification (state=42000,code=40000)? Looks like parsing of CAST only allows primitive types at the moment May be worth filing Jiras on both of these ________________________________ From: Paras Sethia <paras.set...@gmail.com> Sent: Thursday, February 02, 2017 9:13 PM To: user@hive.apache.org Subject: Usage of complex types Hi, I am trying a few queries in Hive using complex data types: > 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) > SELECT CAST (NULL as array<int>); Error: Error while compiling statement: FAILED: ParseException line 1:21 cannot recognize input near 'array' '<' 'int' in primitive type specification (state=42000,code=40000) Queries with similar structure using simple data types give no errors. Is this a bug in Hive or an error on my part with the query? Any help to fix the errors is appreciated. Thanks, Paras PS: I am using Hive 1.2.1 on HDP 2.5.3
