dylanhz created FLINK-40597:
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Summary: TypeExtractor rejects explicitly specified Types.UUID
Key: FLINK-40597
URL: https://issues.apache.org/jira/browse/FLINK-40597
Project: Flink
Issue Type: Bug
Components: API / DataStream
Reporter: dylanhz
After FLINK-40490, explicitly specifying {{Types.UUID}} for a DataStream can
cause type inference for a non-lambda {{MapFunction<UUID, String>}} or
{{KeySelector}} to fail with {{Input mismatch: Basic type expected.}}
{{TypeExtractor.validateInfo()}} validates basic types through
{{{}BasicTypeInfo.getInfoFor(){}}}. However, {{UUID.class}} is intentionally
excluded from that registry to preserve serializer compatibility, so a matching
UUID input is incorrectly rejected.
Explicit UUID input validation should work while keeping automatic UUID
extraction unchanged. Automatic extraction is tracked separately in FLINK-40546.
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