reswqa opened a new pull request, #25729:
URL: https://github.com/apache/flink/pull/25729
## What is the purpose of the change
*Implements FLIP-462: Support Custom Data Distribution for Input Stream of
Lookup Join.*
## Brief change log
- *Expose taskinfo in FunctionContext*
- *Introduce SupportsLookupCustomShuffle interface*
- *Shuffle input stream of lookup join based on LOOKUP hint*
## Verifying this change
UT & 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)`: 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? later PR
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