wenlong88 opened a new pull request #15233:
URL: https://github.com/apache/flink/pull/15233
## What is the purpose of the change
Support json ser/de for StreamExecUnion
## Brief change log
Support json ser/de for StreamExecUnion
## Verifying this change
This change added tests and can be verified as follows:
*(example:)*
- *Added UnionJsonPlanITCase and UnionJsonPlanTest to validate the json
ser/de for StreamExecUnion*
## 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)
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