Joris Van den Bossche created ARROW-7858:
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Summary: [C++][Python] Support casting an Extension type to its
storage type
Key: ARROW-7858
URL: https://issues.apache.org/jira/browse/ARROW-7858
Project: Apache Arrow
Issue Type: Test
Components: C++, Python
Reporter: Joris Van den Bossche
Currently, casting an extension type will always fail: "No cast implemented
from extension<arrow.py_extension_type> to ...".
However, for casting, we could fall back to the storage array's casting rules?
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