lidavidm commented on a change in pull request #12124:
URL: https://github.com/apache/arrow/pull/12124#discussion_r795762911
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File path: cpp/src/arrow/compute/kernels/scalar_arithmetic.cc
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@@ -2437,14 +2462,35 @@ void RegisterScalarArithmetic(FunctionRegistry*
registry) {
std::move(exec)));
}
+ // Add subtract(date32, date32) -> duration(TimeUnit::SECOND)
+ InputType in_type_date_32(date32());
+ auto exec_date_32 = ScalarBinaryEqualTypes<Int64Type, Date32Type,
SubtractDate32>::Exec;
+ DCHECK_OK(subtract->AddKernel({in_type_date_32, in_type_date_32},
+ duration(TimeUnit::SECOND),
std::move(exec_date_32)));
+
+ // Add subtract(date64, date64) -> duration(TimeUnit::MILLI)
+ InputType in_type_date_64(date64());
+ auto exec_date_64 = ScalarBinaryEqualTypes<Int64Type, Date64Type,
Subtract>::Exec;
+ DCHECK_OK(subtract->AddKernel({in_type_date_64, in_type_date_64},
+ duration(TimeUnit::MILLI),
std::move(exec_date_64)));
+
DCHECK_OK(registry->AddFunction(std::move(subtract)));
// ----------------------------------------------------------------------
auto subtract_checked = MakeArithmeticFunctionNotNull<SubtractChecked>(
"subtract_checked", &sub_checked_doc);
AddDecimalBinaryKernels<SubtractChecked>("subtract_checked",
subtract_checked.get());
- // Add subtract(timestamp, duration) -> timestamp
+ // Add subtract_checked(timestamp, timestamp) -> duration
+ for (auto unit : TimeUnit::values()) {
+ InputType in_type(match::TimestampTypeUnit(unit));
Review comment:
Hmm, probably the first timezone, or maybe UTC; since this is a
metadata-only cast, I don't think it's a big difference.
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