Alb3e3 opened a new pull request, #51027: URL: https://github.com/apache/arrow/pull/51027
### Rationale for this change Just as the C++ test suite gained coverage for extension-wrapped unions in #50927 (GH-50623), the cross-implementation integration tests should exercise this case so that every tested implementation handles an extension type whose storage is a union. ### What changes are included in this PR? A new archery integration datagen case, `extension_union`, with two columns: - `sparse_union_ext`: a sparse union (`int32`/`utf8`) wrapped in an extension type - `dense_union_ext`: a dense union (`int16`/`binary`) wrapped in an extension type `ExtensionField` already delegates its storage type/children/generation to the wrapped field, so no new datagen machinery is needed. ### Are these changes tested? The generator produces valid integration JSON locally (schema carries the `ARROW:extension:*` metadata on the union-typed fields, children preserved, batch sizes `[0, 7]`). The cross-implementation integration matrix in CI is the real test here — I've intentionally added the case with no per-implementation skips so the matrix can show which implementations still need a temporary `.skip_tester(...)`; I'll add those (with tracking links) based on the results. ### Are there any user-facing changes? No. This only adds integration-test data. Closes #50993. -- 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]
