[ARROW-12387] [C++][Python] cannot cast float64 array to int64

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 3.0.0
• Component/s: C++, Python
• External issue URL: https://github.com/apache/arrow/issues/28182
• Assignee: Unassigned
• Reporter: Taras Kuzyo
• Created: 14/Apr/21 18:56
• Updated: 11/Jan/23 08:26
• Resolved: 12/May/21 11:07

Description

 

>>> arr = [0.992133801741256, 0.993103448275862]
>>> a = pa.scalar(arr[0], pa.float64())
>>> pc.multiply(a, 1e8).cast(pa.int64())
<pyarrow.Int64Scalar: 99213380>
>>> b = pa.array(arr, pa.float64())
>>> pc.multiply(b, 1e8).cast(pa.int64())
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "pyarrow/array.pxi", line 810, in pyarrow.lib.Array.cast
 File "/usr/local/lib/python3.6/dist-packages/pyarrow/compute.py", line 281, in cast
 return call_function("cast", [arr], options)
 File "pyarrow/_compute.pyx", line 465, in pyarrow._compute.call_function
 File "pyarrow/_compute.pyx", line 294, in pyarrow._compute.Function.call
 File "pyarrow/error.pxi", line 122, in pyarrow.lib.pyarrow_internal_check_status
 File "pyarrow/error.pxi", line 84, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Float value 9.92134e+07 was truncated converting toint64