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https://issues.apache.org/jira/browse/ARROW-7858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-7858.
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Fix Version/s: 0.17.0
Resolution: Fixed
Issue resolved by pull request 6633
[https://github.com/apache/arrow/pull/6633]
> [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: Improvement
> Components: C++, Python
> Reporter: Joris Van den Bossche
> Assignee: Krisztian Szucs
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.17.0
>
> Time Spent: 4h
> Remaining Estimate: 0h
>
> 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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