gaborgsomogyi opened a new pull request, #27340:
URL: https://github.com/apache/flink/pull/27340
## What is the purpose of the change
This PR enhances SQL state API internally to infer savepoint types from
savepoint metadata which eliminates almost all `value-class` and
`key-type-factory` SQL option usages. The trick is simple, use serializers
coming from metadata. Serialized classes still needs to be on classpath.
## Brief change log
- Automatic savepoint type inference based on savepoint metadata
- In test changed `MAP<bigint, bigint>` type to `MAP<string, bigint>` to
introduce difference
- Fixed map key and value proper type inference
- Updated docs
## Verifying this change
Modified tests.
## 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, 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? not applicable
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