cyb70289 commented on a change in pull request #9023:
URL: https://github.com/apache/arrow/pull/9023#discussion_r549188990
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File path: cpp/src/arrow/compute/api_scalar.h
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@@ -345,6 +345,18 @@ Result<Datum> IsValid(const Datum& values, ExecContext*
ctx = NULLPTR);
ARROW_EXPORT
Result<Datum> IsNull(const Datum& values, ExecContext* ctx = NULLPTR);
+/// \brief IsNan returns true for each element of `values` that is NaN,
+/// false otherwise
+///
+/// \param[in] values input to look for NaN
+/// \param[in] ctx the function execution context, optional
+/// \return the resulting datum
+///
+/// \since X.X.X
+/// \note API not yet finalized
+ARROW_EXPORT
+Result<Datum> IsNan(const Datum& values, ExecContext* ctx = NULLPTR);
+
Review comment:
Should also update document `docs/source/cpp/compute.rst`
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