[HIVE-508] Better error message for UDF parameter handling

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Component/s: Diagnosability, UDF
• Assignee: Unassigned
• Reporter: Zheng Shao
• Created: 22/May/09 23:14
• Updated: 26/Sep/11 20:49
• Resolved: 26/Sep/11 20:49

Description

CREATE TABLE x (a map<string,string>);
SELECT round(a) FROM x;

This will show an error message:
FAILED: Unknown exception : org.apache.hadoop.hive.serde2.typeinfo.MapTypeInfo cannot be cast to org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo

We need better error messsage like:
FAILED: Unable to pass a (type: map<string,string>) to function round.