Tom Augspurger created ARROW-13410:
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Summary: Implement min_max kernel for array[string]
Key: ARROW-13410
URL: https://issues.apache.org/jira/browse/ARROW-13410
Project: Apache Arrow
Issue Type: New Feature
Components: C++, Python
Affects Versions: 4.0.1
Reporter: Tom Augspurger
As noted in https://github.com/pandas-dev/pandas/issues/42597,
`pyarrow.compute.min_max` on a string dtype array currently raises. Here's an
example from Python
{{
In [1]: import pyarrow, pyarrow.compute
In [2]: a = pyarrow.array(['c', 'a', 'b'])
In [4]: pyarrow.compute.min_max(a)
---------------------------------------------------------------------------
ArrowNotImplementedError Traceback (most recent call last)
<ipython-input-4-d557440fe5aa> in <module>
----> 1 pyarrow.compute.min_max(a)
~/miniconda3/envs/pandas=1.3.0/lib/python3.9/site-packages/pyarrow/compute.py
in min_max(array, options, memory_pool, **kwargs)
~/miniconda3/envs/pandas=1.3.0/lib/python3.9/site-packages/pyarrow/_compute.pyx
in pyarrow._compute.Function.call()
~/miniconda3/envs/pandas=1.3.0/lib/python3.9/site-packages/pyarrow/error.pxi in
pyarrow.lib.pyarrow_internal_check_status()
~/miniconda3/envs/pandas=1.3.0/lib/python3.9/site-packages/pyarrow/error.pxi in
pyarrow.lib.check_status()
ArrowNotImplementedError: Function min_max has no kernel matching input types
(array[string])
}}
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