beyond1920 opened a new pull request #16025:
URL: https://github.com/apache/flink/pull/16025
## What is the purpose of the change
In theory, `StreamPhysicalWindowTableFunction` should works as a window
assigner and emits at ends of window. However,
`StreamPhysicalWindowTableFunction` could be simplified to a simple window
assigner, and emits per record if it's successor node is one of
`WindowRank`/`WindowJoin`/`WindowAggregate` with
`WindowAttachedWindowingStrategy`, because those nodes would assign input
records to windows have been assigned in input nodes, and trigger emit at ends
of window.
Besides, we should add a limit that window is based on rowtime, because it
has syntax problem if window is assigned based on the proc-time of previous
operator.
The pr introduce a rule to simplify window-tvf.
## Brief change log
- Introduce `SimplifyWindowTableFunctionRule`
- Add a flag in `StreamPhysicalWindowTableFunction` to specify whether it
is a simplify window tvf.
## Verifying this change
- existed UT in `WindowRankTest` and `WindowJoinTest`
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
