David Li created ARROW-12961:
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             Summary: [C++] MSVC issues warning building PyArrow on Windows
                 Key: ARROW-12961
                 URL: https://issues.apache.org/jira/browse/ARROW-12961
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: David Li
            Assignee: David Li


[https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/builds/39448469/job/96ja5h1b984ln09d]

While it doesn't block anything, there's a warning (looks like because a 
parameter was misdeclared in the pxd file):
{noformat}
[33/36] Building CXX object CMakeFiles\_compute.dir\_compute.cpp.obj
_compute.cpp(18101): warning C4244: 'argument': conversion from 'int64_t' to 
'uint32_t', possible loss of data
{noformat}



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