[SPARK-40411] Refactor FlatMapGroupsWithStateExec to have a parent trait

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: Structured Streaming
• Assignee: Hyukjin Kwon
• Reporter: Hyukjin Kwon
• Created: 13/Sep/22 02:58
• Updated: 12/Dec/22 18:10
• Resolved: 13/Sep/22 06:15

Description

There are a lot of stuff to share if we implement another version of FlatMapGroupsWithStateExec. Should better factor them out. This is part of https://github.com/apache/spark/pull/37285

Issue Links

• links to: [Github] Pull Request #37859 (HyukjinKwon)