[FLINK-14610] Add documentation for how to define time attribute in DDL

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.10.0
• Component/s: Documentation
• Assignee: Jark Wu
• Reporter: Jark Wu
• Created: 05/Nov/19 07:39
• Updated: 31/Dec/19 02:43
• Resolved: 31/Dec/19 02:11

Description

Add documentation for how to use watermark syntax and computed column in DDL to define processing time attribute and event time attribute.

Issue Links

• duplicates: FLINK-15277 Update SQL DDL document to add syntax and example of computed column
• links to: https://github.com/apache/flink/pull/10669