Zakelly opened a new pull request, #23855:
URL: https://github.com/apache/flink/pull/23855
## What is the purpose of the change
This PR replaces any combination of key iteration and getting the value for
iterated key from MapState with a entry iteration followed by getKey() and
getValue() of iterated entry. This could save the overhead of get() in MapState.
## Brief change log
Equivalent transformation of code in package
```org.apache.flink.table.runtime.operators.over```.
## Verifying this change
This change is a trivial rework without any new test coverage.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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