lsy3993 commented on code in PR #13466:
URL: https://github.com/apache/doris/pull/13466#discussion_r1002711370
##########
be/src/vec/functions/function_timestamp.cpp:
##########
@@ -569,6 +569,153 @@ class FunctionUnixTimestamp : public IFunction {
}
};
+template <template <typename> class Impl, typename DateType>
+class FunctionDateOrDateTimeToDate : public IFunction {
+public:
+ static constexpr auto name = Impl<DateType>::name;
+ static FunctionPtr create() {
+ return std::make_shared<FunctionDateOrDateTimeToDate<Impl,
DateType>>();
+ }
+
+ String get_name() const override { return name; }
+
+ bool use_default_implementation_for_nulls() const override { return true; }
+
+ bool use_default_implementation_for_constants() const override { return
true; }
+
+ size_t get_number_of_arguments() const override { return 1; }
+
+ bool is_variadic() const override { return true; }
+
+ // input DateTime and Date, return Date
+ // input DateTimeV2 and DateV2, return DateV2
+ DataTypePtr get_return_type_impl(const ColumnsWithTypeAndName& arguments)
const override {
+ if constexpr (std::is_same_v<DateType, DataTypeDateTime> ||
+ std::is_same_v<DateType, DataTypeDate>) {
+ return make_nullable(std::make_shared<DataTypeDate>());
+ } else {
+ return make_nullable(std::make_shared<DataTypeDateV2>());
+ }
+ }
+
+ DataTypes get_variadic_argument_types_impl() const override {
+ if constexpr (std::is_same_v<DateType, DataTypeDateTime> ||
+ std::is_same_v<DateType, DataTypeDate>) {
+ return {std::make_shared<DataTypeDate>()};
Review Comment:
The function needs to do this, input DateTime and Date, return Date; input
DateTimeV2 and DateV2, return DateV2
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