godfreyhe opened a new pull request #13707:
URL: https://github.com/apache/flink/pull/13707
## What is the purpose of the change
*Transformation is not serializable, while StreamOperatorFactory is. We need
to introduce another class (named TableOperatorWrapper) to store the
information of a Transformation, and introduce a utility class (named
TableOperatorWrapper) to convert the Transformation DAG to TableOperatorWrapper
DAG. This pr aims to support this.*
## Brief change log
- *introduce TableOperatorWrapper to store the information of a
Tranformation*
- *Introduce TableOperatorWrapperGenerator to translate transformation DAG
in a multiple-input node to TableOperatorWrapper DAG*
## Verifying this change
This change added tests and can be verified as follows:
*(example:)*
- *Added TableOperatorWrapperTest to test TableOperatorWrapper*
- *Added TableOperatorWrapperGeneratorTest to test
TableOperatorWrapperGenerator*
- *Extended ExplainTest to verify the logic of
BatchExecMultipleInputNode#translateToPlanInternal*
## 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/Mesos, 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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