SteveStevenpoor opened a new pull request, #26702: URL: https://github.com/apache/flink/pull/26702
## What is the purpose of the change We should have the optimizer check if it's possible to use a StreamingMultiJoinOperator according the [common key restrictions](https://cwiki.apache.org/confluence/display/FLINK/FLIP-516%3A+Multi-Way+Join+Operator). ## Brief change log - Modify canCombine method to check whether two nodes have common join keys ## Verifying this change This change is already covered by existing tests, such as MultiJoinTest introduced in [this pr](https://github.com/apache/flink/pull/26687). I added two more cases which cover no common join key behavior. ## 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 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
