[FLINK-24842] Make outputs depends on tails for the iteration body

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: ml-2.0.0
• Labels: pull-request-available
• Assignee: Yun Gao
• Reporter: Yun Gao
• Created: 09/Nov/21 08:43
• Updated: 15/Dec/21 03:11
• Resolved: 15/Nov/21 06:38

Description

If we want to allow users to use table api with the output of the iteration, since the table api would crop the stream graph and only leave the operators that the output depends on, there might be problems since the alignment relies on the participation of all the heads / tails. To avoid this issue, we would add edges from all the tails to all the outputs. 

Issue Links

• links to: GitHub Pull Request #31