[SPARK-22136] Implement stream-stream outer joins in append mode

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: Structured Streaming
• Assignee: Jose Torres
• Reporter: Jose Torres
• Created: 27/Sep/17 00:36
• Updated: 11/Feb/19 12:09
• Resolved: 04/Oct/17 04:43

Description

Followup to inner join subtask. We can implement outer joins by generating null rows when old state gets cleaned up, given that the join has watermarks allowing that cleanup to happen.

Issue Links

• links to: [Github] Pull Request #19327 (joseph-torres)
• links to: [Github] Pull Request #19452 (joseph-torres)
• links to: GitHub Pull Request #19327