Airblader opened a new pull request #16631:
URL: https://github.com/apache/flink/pull/16631
## What is the purpose of the change
This exposes `JoinedRowData` as public API. When implementing Table API
connectors, the need to join `RowData` arises naturally from having to append
metadata to the produced physical row. We should therefore make it easy for
implementors to do so without relying on internal APIs.
This PR makes the class public, updates its documentation and adds some
basic tests for it.
The PR is split into two commits: the actual change to `JoinedRowData`, and
a second commit moving it into the same package as `RowData`, `GenericRowData`,
…
## Verifying this change
This change is already covered by existing tests. However,
`JoinedRowDataTest` has also been added.
## 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)`: yes
- The serializers: no
- The runtime per-record code paths (performance sensitive): "yes", but no
actual runtime behavior has been changed
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, 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? JavaDocs
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