westonpace commented on code in PR #14434:
URL: https://github.com/apache/arrow/pull/14434#discussion_r1008586544
##########
cpp/src/arrow/compute/kernels/base_arithmetic_internal.h:
##########
@@ -485,6 +485,22 @@ struct NegateChecked {
}
};
+struct Exp {
+ template <typename T, typename Arg>
+ static constexpr enable_if_floating_value<Arg, T> Call(KernelContext*, Arg
exp,
+ Status*) {
+ static_assert(std::is_same<T, Arg>::value, "");
+ return std::exp(exp);
+ }
+
+ template <typename T, typename Arg>
+ static constexpr enable_if_decimal_value<Arg, T> Call(KernelContext*, Arg
exp,
+ Status*) {
+ static_assert(std::is_same<T, Arg>::value, "");
+ return exp.Exp();
Review Comment:
FWIW, we should not be allowing this kind of implicit cast and should
instead reject a plan containing a decimal exp call. If the producer wants to
allow the cast to float they can allow it.
However, this issue is beyond this PR. I've created
https://issues.apache.org/jira/browse/ARROW-18193
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