Taras Kuzyo created ARROW-10431:
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Summary: Cast timestamp to time32/time64
Key: ARROW-10431
URL: https://issues.apache.org/jira/browse/ARROW-10431
Project: Apache Arrow
Issue Type: Wish
Components: C++, Python
Affects Versions: 2.0.0
Reporter: Taras Kuzyo
It would be great to have the ability to cast a timestamp to a time type.
I am not sure about the amount of coding involved but conceptually it looks
relatively simple.
{code:java}
>>> pc.cast(pc.strptime('13:13:30', format='%H:%M:%S', unit='s'),
>>> pa.time32('s'))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.6/dist-packages/pyarrow/compute.py", line 243, in
cast
return call_function("cast", [arr], options)
File "pyarrow/_compute.pyx", line 446, in pyarrow._compute.call_function
File "pyarrow/_compute.pyx", line 275, in pyarrow._compute.Function.call
File "pyarrow/error.pxi", line 122, in
pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 105, in pyarrow.lib.check_status
pyarrow.lib.ArrowNotImplementedError: Unsupported cast from timestamp[s] to
time32 using function cast_time32{code}
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