twalthr opened a new pull request #10368: [FLINK-14983][table-common] Add interfaces for input type inference URL: https://github.com/apache/flink/pull/10368 ## What is the purpose of the change This adds a similar class as Calcite's `SqlOperandTypeInference` to Flink's type inference. For FLIP-65, we will need to implement those interfaces as the planner needs infer the `DataType`s out of logical types that come from the logical query. This is also beneficial to support the NULL literal in the future. ## Brief change log - Introduction of `InputTypeStrategy` - Update of the `TypeInferenceUtil` - Integration into `ResolveCallByArgumentsRule` (not used yet) - Implementation of built-in `InputTypeStrategies` ## Verifying this change This change added tests and can be verified as follows: `InputTypeStrategiesTest` ## 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, Yarn/Mesos, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? yes - If yes, how is the feature documented? JavaDocs
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