[FLINK-19094] Revise the description of watermark strategy in Flink Table document

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.0, 1.11.0
• Fix Version/s: 1.11.2, 1.12.0
• Component/s: Documentation
• Labels: pull-request-available
• Assignee: Leonard Xu
• Reporter: Leonard Xu
• Created: 31/Aug/20 02:58
• Updated: 09/Sep/20 14:12
• Resolved: 09/Sep/20 08:21

Description

The description of watermark strategy is wrong in doc[1]

• Strictly ascending timestamps: WATERMARK FOR rowtime_column AS rowtime_column.

Emits a watermark of the maximum observed timestamp so far. Rows that have a timestamp smaller to the max timestamp are not late.

• Ascending timestamps: WATERMARK FOR rowtime_column AS rowtime_column - INTERVAL '0.001' SECOND.
  Emits a watermark of the maximum observed timestamp so far minus 1. Rows that have a timestamp equal and smaller to the max timestamp are not late.

[1] https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/table/sql/create.html

Issue Links

• links to: GitHub Pull Request #13282