thswlsqls opened a new pull request, #8678: URL: https://github.com/apache/paimon/pull/8678
### Purpose fix #8677 - `LanceFileFormat.LanceRowTypeVisitor.visit(MultisetType)` returned `null`, so a MULTISET column passed `validateDataFields()` but then failed opaquely at write time in `ArrowFieldTypeConversion.visit(MultisetType)` (`UnsupportedOperationException`). - Make `visit(MultisetType)` throw at validation time, mirroring the sibling `visit(MapType)` which already rejects MAP with a clear message. ### Tests - Added `LanceFileFormatTest#testValidateDataFields_UnsupportedMultisetType` asserting `validateDataFields` throws `UnsupportedOperationException` for a MULTISET column. - `mvn -pl paimon-lance -DfailIfNoTests=false clean install` — passed (checkstyle + spotless + rat). `LanceFileFormatTest`: 5 tests passed. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
