Wes McKinney created ARROW-5931:
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Summary: [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
Fix For: 1.0.0
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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