docete opened a new pull request #11021: [FLINK-15546][table-planner-blink] Fix obscure error message from Sca… URL: https://github.com/apache/flink/pull/11021 …larOperatorGens::generateCast ## What is the purpose of the change ScalarOperatorGens::generateCast would produce obscure error message such as `Unsupported cast from 'ROW' to 'ROW'.` if we want cast one RowType to another.Users are unlikely to figure out what goes wrong from the above error message. Something like `Unsupported cast from 'ROW<DECIMAL(2,1), CHAR(3)>' to 'ROW<DOUBLE, VARCHAR(10)>' `will be more helpful. This PR would fix this. ## Brief change log - 0396817 Use `LogicalType` instead of `LogicalTypeRoot` to produce clear error message. ## Verifying this change This change added tests to verify ## 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, 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) - If yes, how is the feature documented? (not applicable / docs / **JavaDocs** / not documented)
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