[jira] [Created] (ARROW-5514) [C++] Printer for uint64 shows wrong values

[Joris Van den Bossche (JIRA)]

Joris Van den Bossche created ARROW-5514:
--------------------------------------------

             Summary: [C++] Printer for uint64 shows wrong values
                 Key: ARROW-5514
                 URL: https://issues.apache.org/jira/browse/ARROW-5514
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 0.13.0
            Reporter: Joris Van den Bossche


>From the example in ARROW-5430:

{code}
In [16]: pa.array([14989096668145380166, 15869664087396458664], 
type=pa.uint64())                                                               
                                                                    
Out[16]: 
<pyarrow.lib.UInt64Array object at 0x7ff7c51bdf48>
[
  -3457647405564171450,
  -2577079986313092952
]
{code}

I _think_ the actual conversion is correct, and it's only the printer that is 
going wrong, as {{to_numpy}} gives the correct values:

{code}
In [17]: pa.array([14989096668145380166, 15869664087396458664], 
type=pa.uint64()).to_numpy()                                                    
                                                                    
Out[17]: array([14989096668145380166, 15869664087396458664], dtype=uint64)
{code}



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