CurtHagenlocher opened a new pull request, #471: URL: https://github.com/apache/arrow-dotnet/pull/471
## What's Changed `GetSlicedValues` only sliced when `Values` derived from `Array`. `ExtensionArray` implements `IArrowArray` but doesn't derive from `Array`, so a list of extension values (e.g. `list<arrow.uuid>` backed by a `GuidArray`) returned `null` for non-null elements, indistinguishable from a null list entry. This slices any `IArrowArray` via `ArrowArrayFactory.Slice`, which is what `Array.Slice` already delegates to, so behavior for regular arrays is unchanged and extension values now come back as the appropriate extension array. Applied to `ListArray`, `ListViewArray`, `LargeListArray`, `LargeListViewArray` and `FixedSizeListArray` (`ListViewArray` had the same check, though the issue didn't list it). Added `ListArrayExtensionValuesTests` covering all five list types with `GuidArray` values; these fail without the fix. Closes #468. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 5.5 <[email protected]> -- 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]
