twalthr opened a new pull request, #22892:
URL: https://github.com/apache/flink/pull/22892
## What is the purpose of the change
The SQL standard defines STRING family as both (VAR)CHAR and (VAR)BINARY
strings. Some function declarations don't match with the runtime
implementation. This leads to arbitrary exceptions in the code generation. Once
we update each function to support BINARY strings as well, we can reenable the
operand type strategy.
## Brief change log
Replace STRING with CHARACTER where appropriate in sync with CodeGen.
## Verifying this change
This change is already covered by existing tests, such as
`ScalaFunctionsTest`.
## 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)`: yes
- 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
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