Jonathan Keane created ARROW-13364:
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Summary: [C++] Should NaN comparison return false or NaN/NA?
Key: ARROW-13364
URL: https://issues.apache.org/jira/browse/ARROW-13364
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Jonathan Keane
In working on ARROW-12964 we ran into some corner behaviors with {{NaN}} that
don't match our (and R's) expectations. It appears that (any?) comparison with
`NaN` results in false:
{code:r}
> Scalar$create(NaN) > 5
Scalar
false
{code}
though at least in R this would result in an NA value:
{code:r}
> NaN > 5
[1] NA
{code}
The current behavior _does_ match numpy's behavior:
{code:python}
>>> np.nan > 5
False
{code}
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