[SPARK-19859] The new watermark should override the old one

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.1, 2.2.0
• Component/s: Structured Streaming
• Assignee: Shixiong Zhu
• Reporter: Shixiong Zhu
• Created: 07/Mar/17 23:49
• Updated: 09/Mar/17 02:33
• Resolved: 08/Mar/17 04:35

Description

The new watermark should override the old one. Otherwise, we just pick up the first column which has a watermark, it may be unexpected.

Issue Links

• links to: [Github] Pull Request #17199 (zsxwing)
• links to: [Github] Pull Request #17221 (uncleGen)