dawidwys opened a new pull request #8852: [FLINK-12798][table-api][table-planner] Add a proper discover mechanism that will enable switching between Flink & Blink Planner/Executor URL: https://github.com/apache/flink/pull/8852 ## What is the purpose of the change This PR improves the lookup mechanism for `Planner` & `Executor` to enable switching between Flink & Blink planner components/ ## Brief change log - Improved type handling in `TableFactoryService` - Enabled returning multiple matching `TableFactory`s from `TableFactoryService` - Added `ExecutorFactory` & `PlannerFactory` that can be discovered based on string properties - Added `PlannerDescriptor` to enable switching between different planner components in the API. ## Verifying this change This change is already covered by existing tests. Added tests for disambiguating factories based on `optionalContext`: `org.apache.flink.table.factories.ComponentFactoryServiceTest` ## 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, 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**): should be added as a follow-up as part of major rework of docs for the updated Table API
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