[PIG-3074] Should check that any UDF returns a Schema of only one Field

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.11, 0.12.0
• Fix Version/s: 0.12.0
• Assignee: Jonathan Coveney
• Reporter: Jonathan Coveney
• Created: 04/Dec/12 00:16
• Updated: 18/Feb/13 15:53
• Resolved: 18/Feb/13 15:53

Description

Currently, it is "valid" for a UDF's outputSchema to return a Schema of more than one field (ie an int,int,long). This causes weird error (different treatment in the case of one value instead of multiple).

I will add a check where you can only have one field (multiple fields should be contained in a Tuple).

This will potentially not be backwards compatible, but it is a bug that people do that.

Issue Links

• duplicates: PIG-3082 outputSchema of a UDF allows two usages when describing a Tuple schema