godfreyhe opened a new pull request #15138:
URL: https://github.com/apache/flink/pull/15138
## What is the purpose of the change
*FlinkRelMdUniqueKeys#getTableUniqueKeys uses the original columns to find
the index of primary keys. But after project push-down, the indexes is
incorrect based on original columns, and the new columns should be used. This
pr aims to fix it.*
## Brief change log
- *FlinkRelMdUniqueKeys gets incorrect result on TableScan after project
push-down*
- *Clean the unused code in FlinkRelMdUniqueKeys*
## Verifying this change
This change added tests and can be verified as follows:
- *Extended FlinkRelMdUniqueKeysTest to verify the change*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / no)
- If yes, how is the feature documented? (not applicable / docs / JavaDocs
/ not documented)
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