Preserve PyArrow extension metadata when chaining Python scalar UDFs#1287

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kosiew wants to merge 18 commits intoapache:mainfrom

kosiew:udf-1172

Commits on Oct 22, 2025

Implement metadata-aware PySimpleScalarUDF
kosiew
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Clone pyarrow.Field objects for FFI handoff
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Updated the _function and _decorator helpers in ScalarUDF.udf to use concrete Callable[..., Any] and pa.DataType | pa.Field annotations, removing the lingering references to the deleted _R type var…
kosiew
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Updated the internal ScalarUDF.udf helper signatures so IDEs and type checkers surface support for pyarrow.Field inputs when defining UDFs
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Refactor imports in udf.rs for improved organization and clarity
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Add shared PyArrowArray alias and refine ScalarUDFs
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Add feature flag for pyarrow UUID helper detection
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Add assertions for UUID extension type in tests
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Teach _wrap_extension_value to handle empty arrays
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Refactor type alias for PyArrowArray to use Union for better clarity
kosiew
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Fix Ruff errors
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Enhance documentation for PyArrowArray type alias to clarify usage and improve type-checking
kosiew
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Commits on Oct 23, 2025

Commits on Nov 1, 2025