godfreyhe opened a new pull request #14733:
URL: https://github.com/apache/flink/pull/14733
## What is the purpose of the change
*Since all exec node do not extend from LegacyExecNodeBase, we can remove
them (LegacyExecNodeBase, LegacyBatchExecNode and LegacyStreamExecNode). And
this pr also do some code clean up, such as: rename ExecNode#getDesc to
ExecNode#getDescription, fix some typos*
## Brief change log
- *Remove legacy exec nodes*
- *Rename ExecNode#getDesc to ExecNode#getDescription*
- *Move CommonPhysicalJoin and CommonPhysicalLookupJoin to
`nodes.physical.common` package*
- *Minor code cleanup for some exec nodes*
## Verifying this change
This change is code cleanup without any 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/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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