swapna267 opened a new pull request, #27600:
URL: https://github.com/apache/flink/pull/27600
## What is the purpose of the change
Usecases:
1. Extracting a Variant Field as Row MapType/ArrayType. A Map is just nested
Variant Objects. We need to be able to extract field names at Variant top level
in-order to read it as MapType. For Arrays, we need size to construct fixed
size arrays.
2. Automatic inference of Sink Table schema from Variant column type.
## Brief change log
This PR adds two new accessor methods to the Variant interface:
getArraySize() - Returns the size of an array variant
getFieldNames() - Returns the field names of an object variant (top-level
only)
## Verifying this change
Extended the existing tests to test the new methods.
## 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): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
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