[FLINK-6837] Fix a small error message bug, And improve some message info.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.4.0
• Component/s: Table SQL / API
• Assignee: sunjincheng
• Reporter: sunjincheng
• Created: 02/Jun/17 15:44
• Updated: 04/Jun/17 13:42
• Resolved: 04/Jun/17 13:42

Description

Fix a variable reference error, and improve some error message info.

Issue Links

• links to: GitHub Pull Request #4060