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fix: type scalar UDF returns as Arrow arrays#1528

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Merged
timsaucer merged 1 commit into from
May 28, 2026
Merged

fix: type scalar UDF returns as Arrow arrays #1528

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6 changes: 3 additions & 3 deletions python/datafusion/user_defined.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -33,7 +33,7 @@
if TYPE_CHECKING:
from _typeshed import CapsuleType as _PyCapsule

_R = TypeVar("_R", bound=pa.DataType)
_R = TypeVar("_R", bound=pa.Array)
from collections.abc import Callable, Sequence


Expand DownExpand Up@@ -125,7 +125,7 @@ def __init__(
name: str,
func: Callable[..., _R],
input_fields: list[pa.Field],
return_field: _R,
return_field: pa.Field,
volatility: Volatility | str,
) -> None:
"""Instantiate a scalar user-defined function (UDF).
Expand DownExpand Up@@ -264,7 +264,7 @@ def _function(

def _decorator(
input_fields: Sequence[pa.DataType | pa.Field] | pa.DataType | pa.Field,
return_field: _R,
return_field: pa.DataType | pa.Field,
volatility: Volatility | str,
name: str | None = None,
) -> Callable:
Expand Down
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