HappenLee commented on a change in pull request #7693: URL: https://github.com/apache/incubator-doris/pull/7693#discussion_r782696637
########## File path: be/src/vec/functions/function_conv.cpp ########## @@ -0,0 +1,163 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include "exprs/math_functions.h" +#include "vec/data_types/data_type_number.h" +#include "vec/data_types/data_type_string.h" +#include "vec/functions/simple_function_factory.h" +#include "vec/utils/util.hpp" + +namespace doris::vectorized { + +template <typename Impl> +class FunctionConv : public IFunction { +public: + static constexpr auto name = "conv"; + String get_name() const override { return name; } + static FunctionPtr create() { return std::make_shared<FunctionConv<Impl>>(); } + + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + return make_nullable(std::make_shared<DataTypeString>()); + } + DataTypes get_variadic_argument_types_impl() const override { + return {std::make_shared<typename Impl::DataType>(), std::make_shared<DataTypeInt8>(), + std::make_shared<DataTypeInt8>()}; + } + size_t get_number_of_arguments() const override { + return get_variadic_argument_types_impl().size(); + } + + bool use_default_implementation_for_nulls() const override { return false; } + bool use_default_implementation_for_constants() const override { return true; } + + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + size_t result, size_t input_rows_count) override { + auto result_column = ColumnString::create(); + auto result_null_map_column = ColumnUInt8::create(input_rows_count, 0); + + ColumnPtr argument_columns[3]; + + for (int i = 0; i < 3; ++i) { Review comment: should set `use_default_implementation_for_nulls()` true -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
