[FLINK-3622] Improve error messages for invalid joins

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.0
• Component/s: Table SQL / API
• Assignee: Fabian Hueske
• Reporter: Fabian Hueske
• Created: 16/Mar/16 17:02
• Updated: 18/Mar/16 13:54
• Resolved: 18/Mar/16 13:54

Description

Invalid Table API joins do not show descriptive error messages:

• Joins without a equality join condition
• Joins with non-matching equality join predicates