beyond1920 opened a new pull request #9335: [FLINK-13503][API] Add contract in `LookupableTableSource` to specify the behavior when lookupKeys contains null. URL: https://github.com/apache/flink/pull/9335 ## What is the purpose of the change Add contract in `LookupableTableSource` to specify the behavior when lookupKeys contains null. And update existed connector to comply with this contract. ## Brief change log - Add contract in `LookupableTableSource` to specify the behavior when lookupKeys contains null. - Update HBase lookupFunction - Update JDBC lookupFunction ## Verifying this change existed IT. ## 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? no - If yes, how is the feature documented? not applicable
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