jeyhunkarimov opened a new pull request, #23586:
URL: https://github.com/apache/flink/pull/23586
## What is the purpose of the change
This pull request fixes tests in `LookupJoinITCase`. The errors in tests
occured when changing `registerFunction` to `createTemporaryFunction `. The
main issue was that existing `UserDefinedFunctionTestUtils.TestAddWithOpen`
class's `eval` method was enforcing `NOT NULL` on types, because `Int` and
`Long` types cannot be null in `scala`. This was creating a discrepancy between
table schema and the registered function.
## Brief change log
- Add an extra method to `UserDefinedFunctionTestUtils.TestAddWithOpen`
to support `nullable` types
## Verifying this change
This change is already covered by existing tests, such as
`UserDefinedFunctionTestUtils`.
## 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
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