[FLINK-8301] Support Unicode in codegen for SQL && TableAPI

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0, 1.5.0
• Component/s: Table SQL / API
• Assignee: Ruidong Li
• Reporter: Ruidong Li
• Created: 21/Dec/17 08:04
• Updated: 26/Dec/17 11:48
• Resolved: 26/Dec/17 11:48

Description

The current code generation do not support Unicode, "\u0001" will be generated to "
u0001", function call like concat(str, "\u0001") will lead to wrong result.

This issue intend to handle char/varchar literal correctly, some examples followed as below.
literal: '\u0001abc' -> codegen: "\u0001abc"
literal: '\u0022\' -> codegen: "\"
"

Issue Links

• links to: GitHub Pull Request #5203