wuchong opened a new pull request #8629: [FLINK-12088][table-runtime-blink] Introduce unbounded streaming inner/left/right/full join operator URL: https://github.com/apache/flink/pull/8629 ## What is the purpose of the change Introduce unbounded streaming inner/left/right/full join operator. We will support SEMI/ANTI in another pull request. ## Brief change log - Introduce `JoinInputSideSpec` describes input information, for example: has/not unique key. - Introduce `JoinRecordStateView` to encapsulates the join state and provides some APIs facing the input records. Because we will have different state structure depends on the input information. - Introduce `StreamingJoinOperator` to support INNER/LEFT/RIGHT/FULL together. ## Verifying this change Adds `JoinITCase` to test join end-to-end. ## 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, 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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