[FLINK-15343] Add Watermarks options for TwoInputStreamOperator

• Type: Improvement
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Component/s: API / DataStream
• Labels: auto-deprioritized-major auto-deprioritized-minor pull-request-available
• Assignee: Unassigned
• Reporter: jocean.shi
• Created: 20/Dec/19 08:11
• Updated: 17/Apr/22 22:38

Description

  Currently, The "TwoInputStreamOperator" such as "CoBroadcastWithKeyedOperator" "KeyedCoProcessOperator" and the
(Co)stream such as "ConnectedStreams" "BroadcastConnectedStream" only support compute watermark by two stream.
but user just need one stream to compute watermark in some case.
     For example: one stream is only rule data or control command, it
don't hava event time.
I think user has right to choose which stream to compute watermark.

Issue Links

• links to: GitHub Pull Request #10651