lidavidm commented on a change in pull request #12124:
URL: https://github.com/apache/arrow/pull/12124#discussion_r796630304
##########
File path: cpp/src/arrow/compute/kernels/scalar_arithmetic.cc
##########
@@ -1611,6 +1636,23 @@ Result<ValueDescr>
ResolveDecimalDivisionOutput(KernelContext*,
});
}
+Result<ValueDescr> ResolveTemporalOutput(KernelContext*,
+ const std::vector<ValueDescr>& args) {
+ auto left_type = checked_cast<const TimestampType*>(args[0].type.get());
+ auto right_type = checked_cast<const TimestampType*>(args[1].type.get());
+ DCHECK_EQ(left_type->id(), right_type->id());
+
+ if ((left_type->timezone() == "" || right_type->timezone() == "") &&
+ left_type->timezone() != right_type->timezone()) {
+ RETURN_NOT_OK(
+ Status::Invalid("Subtraction of zoned and non-zoned times is
ambivalent. (",
+ left_type->timezone(), right_type->timezone(), ")."));
+ }
+
+ auto type = duration(std::max(left_type->unit(), right_type->unit()));
Review comment:
nit, but as used, the units should always match right?
##########
File path: cpp/src/arrow/compute/kernels/scalar_arithmetic.cc
##########
@@ -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:
Looks good to me, thanks.
##########
File path: cpp/src/arrow/compute/kernels/scalar_arithmetic.cc
##########
@@ -1611,6 +1636,23 @@ Result<ValueDescr>
ResolveDecimalDivisionOutput(KernelContext*,
});
}
+Result<ValueDescr> ResolveTemporalOutput(KernelContext*,
+ const std::vector<ValueDescr>& args) {
+ auto left_type = checked_cast<const TimestampType*>(args[0].type.get());
+ auto right_type = checked_cast<const TimestampType*>(args[1].type.get());
+ DCHECK_EQ(left_type->id(), right_type->id());
+
+ if ((left_type->timezone() == "" || right_type->timezone() == "") &&
+ left_type->timezone() != right_type->timezone()) {
+ RETURN_NOT_OK(
+ Status::Invalid("Subtraction of zoned and non-zoned times is
ambivalent. (",
Review comment:
nit: "ambiguous" or "undefined"?
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