[PR] [api] Recurse into element type in MultisetType field-id comparison [paimon]

["thswlsqls (via GitHub)" <gi...@apache.org>]

thswlsqls opened a new pull request, #8519:
URL: https://github.com/apache/paimon/pull/8519

   ### Purpose
   
   fix #8516
   
   - `MultisetType` did not override `equalsIgnoreFieldId(DataType)` or `isPrunedFrom(Object)`, so it inherited the `DataType` base methods that just `return equals(o)` and compare element field ids.
   - For `MULTISET<ROW<...>>` this made ignore-field-id comparison and pruning wrongly return false, corrupting schema-evolution comparison up the chain (`DataField.equalsIgnoreFieldId` / `RowType.equalsIgnoreFieldId`).
   - Add both overrides recursing into `elementType`, matching sibling `ArrayType`/`MapType`/`RowType`/`VectorType`.
   
   ### Tests
   
   - Added `MultisetTypeTest` covering positive (differing field ids equal, pruned element) and negative (different name/type) cases for both methods.
   - `mvn -pl paimon-api test` — MultisetTypeTest 4 tests passed; module `clean install` green (no profiles).
   


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Re: [PR] [api] Recurse into element type in MultisetType field-id comparison [paimon]

["JingsongLi (via GitHub)" <gi...@apache.org>]

JingsongLi merged PR #8519:
URL: https://github.com/apache/paimon/pull/8519


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