[MADLIB-1208] Check that grouping column is optional for predict functions in all modules

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Fix Version/s: v1.14
• Component/s: All Modules
• Assignee: Unassigned
• Reporter: Frank McQuillan
• Created: 21/Feb/18 01:00
• Updated: 22/Feb/18 01:41
• Resolved: 22/Feb/18 01:41

Description

Follow on from: https://issues.apache.org/jira/browse/MADLIB-1207

Check all predict functions to ensure that the grouping column is optional. This is needed because grouping is often added in a later release and if the predict function makes it mandatory, then you can't use your models trained before you upgraded.