[ARROW-4101] [C++] Binary identity cast not implemented

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/20694
• Assignee: Francois Saint-Jacques
• Reporter: Wes McKinney
• Created: 21/Dec/18 16:43
• Updated: 11/Jan/23 07:31
• Resolved: 22/Dec/18 23:43

Description

Surfaced by test case in https://github.com/apache/arrow/pull/3239

```
In [1]: import pyarrow as pa

In [2]: pa.array([b'foo'])
Out[2]:
<pyarrow.lib.BinaryArray object at 0x7f6ed510b9a8>
[
666F6F
]

In [3]: arr = pa.array([b'foo'])

In [4]: arr.cast(pa.binary())
---------------------------------------------------------------------------
ArrowNotImplementedError Traceback (most recent call last)
<ipython-input-4-d6c6f1159d55> in <module>()
----> 1 arr.cast(pa.binary())

~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pyarrow/array.pxi in pyarrow.lib.Array.cast()

~/miniconda/envs/arrow-dev/lib/python3.6/site-packages/pyarrow/error.pxi in pyarrow.lib.check_status()

ArrowNotImplementedError: No cast implemented from binary to binary
```

Issue Links

• links to: GitHub Pull Request #3245