lsy3993 commented on code in PR #13466:
URL: https://github.com/apache/doris/pull/13466#discussion_r1000096388
##########
be/src/vec/functions/function_timestamp.cpp:
##########
@@ -569,6 +569,151 @@ class FunctionUnixTimestamp : public IFunction {
}
};
+template <typename Impl, typename DateType>
+class FunctionDateOrDateTimeToDate : public IFunction {
+public:
+ static constexpr auto name = Impl::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>) {
+ return {std::make_shared<DataTypeDate>()};
+ } else if constexpr (std::is_same_v<DateType, DataTypeDateV2>) {
+ return {std::make_shared<DataTypeDateV2>()};
+ } else {
+ return {std::make_shared<DataTypeDateTimeV2>()};
+ }
+ }
+
+ Status execute_impl(FunctionContext* context, Block& block, const
ColumnNumbers& arguments,
+ size_t result, size_t input_rows_count) override {
+ return Impl::execute_impl(context, block, arguments, result,
input_rows_count);
+ }
+};
+
+template <typename DateType>
+struct LastDayImpl {
+ static constexpr auto name = "last_day";
+
+ static Status execute_impl(FunctionContext* context, Block& block,
+ const ColumnNumbers& arguments, size_t result,
+ size_t input_rows_count) {
+ auto null_map = ColumnUInt8::create(input_rows_count, 0);
+ ColumnPtr res_column;
+ ColumnPtr argument_column =
+
block.get_by_position(arguments[0]).column->convert_to_full_column_if_const();
+ if constexpr (std::is_same_v<DateType, DataTypeDateTime>) {
Review Comment:
Use DataTypeDateTime there can solve both date and datetime, why we should
add DataTypeDate?
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