xuyangzhong opened a new pull request, #20359:
URL: https://github.com/apache/flink/pull/20359
## What is the purpose of the change
Introduce join hint in Flink batch.
## Brief change log
- [FLINK-28678][table-planner] Support SQL hint for Filter, SetOp, Sort,
Window, Values, Correlate, etc. Mainly cherry-pick from [CALCITE-5107]
- add join hint to rules in Flink batch
- add some tests to verify this pr
## Verifying this change
Some tests are added to verify this pr.
## 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? yes
- If yes, how is the feature documented? not documented but a standalone
pr will introduce the doc
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