bkietz commented on issue #39753: URL: https://github.com/apache/arrow/issues/39753#issuecomment-1924249433
FixedShapeTensor is a canonical extension type which [also uses `fixed_size_list` in its storage type](https://github.com/apache/arrow/blob/8bff1000e3c093a4b162c17cc04ca03949bb9e4b/cpp/src/arrow/extension/fixed_shape_tensor.h#L57). It was added in #8510, and mailing list [discussion](https://lists.apache.org/thread/oxvx0z0no2yyqsffzdc6nyjh6j4o6krs) and [vote](https://lists.apache.org/thread/f303yscj8gq4oggvvcbvf5zpo972l1kk) is archived. As for numpy zero copy: we don't currently have a canonical extension type which maps to a numpy type like this one would. In order to support this, it'd be necessary to modify functions like [NumPyDtypeToArrow](https://github.com/apache/arrow/blob/8bff1000e3c093a4b162c17cc04ca03949bb9e4b/python/pyarrow/src/arrow/python/numpy_convert.cc#L133) which maps from a numpy type to an arrow DataType. That might be sufficient for `NumPyConverter::ConvertData` to [recognize zero-copy compatibility](https://github.com/apache/arrow/blob/8bff1000e3c093a4b162c17cc04ca03949bb9e4b/python/pyarrow/src/arrow/python/numpy_to_arrow.cc#L465-L470) -- 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]
