Fokko commented on code in PR #252:
URL: https://github.com/apache/iceberg-python/pull/252#discussion_r1467065763
##########
pyiceberg/io/pyarrow.py:
##########
@@ -1152,24 +1163,31 @@ def field(self, field: NestedField, _:
Optional[pa.Array], field_array: Optional
return field_array
def list(self, list_type: ListType, list_array: Optional[pa.Array],
value_array: Optional[pa.Array]) -> Optional[pa.Array]:
- return (
- pa.ListArray.from_arrays(list_array.offsets,
self.cast_if_needed(list_type.element_field, value_array))
- if isinstance(list_array, pa.ListArray)
- else None
- )
+ if isinstance(list_array, pa.ListArray) and value_array is not None:
+ arrow_field =
pa.list_(self._construct_field(list_type.element_field, value_array.type))
+ if isinstance(value_array, pa.StructArray):
+ # Arrow does not allow reordering of fields, therefore we have
to copy the array :(
Review Comment:
I've pushed a fix, but I don't think we can solve this yet without a fix in
Arrow upstream 😢 https://github.com/apache/arrow/issues/38809
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