bkietz commented on code in PR #14659:
URL: https://github.com/apache/arrow/pull/14659#discussion_r1025425267
##########
cpp/src/arrow/compute/exec/expression_test.cc:
##########
@@ -69,6 +70,39 @@ Expression true_unless_null(Expression argument) {
return call("true_unless_null", {std::move(argument)});
}
+Expression add(Expression l, Expression r) {
+ return call("add", {std::move(l), std::move(r)});
+}
+
+namespace arrow_literals {
+
+using namespace std::chrono_literals;
+
+inline auto operator""_ts(const char* c, size_t s) {
+ return [s = StringScalar(std::string{c, s})](TimeUnit::type unit) {
+ return literal(*s.CastTo(timestamp(unit)));
+ };
+}
+
+} // namespace arrow_literals
+
+template <typename Rep, typename Period>
+Expression literal(std::chrono::duration<Rep, Period> d) {
+ int64_t int_value = d.count();
+ TimeUnit::type unit;
+ if constexpr (std::is_same_v<Period, std::nano>) {
+ unit = TimeUnit::NANO;
+ } else if constexpr (std::is_same_v<Period, std::micro>) {
+ unit = TimeUnit::MICRO;
+ } else if constexpr (std::is_same_v<Period, std::milli>) {
+ unit = TimeUnit::MILLI;
+ } else {
+ unit = TimeUnit::SECOND;
+ int_value = std::chrono::duration_cast<std::chrono::seconds>(d).count();
+ }
+ return literal(*MakeScalar(int_value)->CastTo(duration(unit)));
+}
Review Comment:
@pitrou I've removed `<chrono>`; for these constructors all we really needed
was `<ratio>` which is definitely tiny. How's that?
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