matriv opened a new pull request, #19516:
URL: https://github.com/apache/flink/pull/19516
## What is the purpose of the change
Revert behaviour of binary to string casts and vice versa, to not use
hex enconding/decoding, but simple UTF-8 bytes transformation from a
byte[] to a string and vice versa.
Add a `isPrinting()` method to the `CastRule.Context` set to true used by
`RowDataToStringConverterImpl`
which defines a different casting behaviour for `BinaryToStringCastRule`
when printing binary columns, so
that we output columns of binary type as (for example): `x'ab03f98e'`, which
can easily be copy pasted as
a binary literal to another SQL query.
## Verifying this change
Adjusted the tests accordingly in
- `CastFunctionITCase`
- `CastRulesTest`
- `ScalarFunctionsTest`
- `CastFunctionMiscITCase`
- Added binary column to `CliTableauResultViewTest` to test the printing.
## 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? **no**
- If yes, how is the feature documented? **not applicable**
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