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https://issues.apache.org/jira/browse/ARROW-5931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-5931:
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Fix Version/s: (was: 0.16.0)
> [C++] Extend extension types facility to provide for serialization and
> deserialization in IPC roundtrips
> --------------------------------------------------------------------------------------------------------
>
> Key: ARROW-5931
> URL: https://issues.apache.org/jira/browse/ARROW-5931
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
>
> A use case here is when an array needs to reference some external data. For
> example, suppose that we wanted to implement an array that references a
> sequence of Python objects as {{PyObject*}}. Obviously, a {{PyObject*}} must
> be managed by the Python interpreter.
> For a vector of some {{T*}} to be sent through the IPC machinery, it must be
> embedded in some Arrow type on the wire. For example, the memory resident
> version of {{PyObject*}} might be 8-bytes per value (1 pointer per value)
> while being serialized to the binary IPC protocol, such {{PyObject*}} values
> must be serialized into an Arrow Binary type.
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