cooper-xiang opened a new pull request #14974:
URL: https://github.com/apache/flink/pull/14974
## What is the purpose of the change
This pull request fixes the bug that implicit conversions in equals and
notEquals filter predicates doesn't work
## Brief change log
Cast other types as string type when compare between string type and other
types in `=` and `<>` predicates
## Verifying this change
This change added tests and can be verified as follows:
JavaSqlITCase#testImplicitConvertAtEqual
JavaSqlITCase#testImplicitConvertAtNotEqual
## 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**)
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