Mryange commented on code in PR #47102: URL: https://github.com/apache/doris/pull/47102#discussion_r2250612830
########## be/src/vec/functions/function_format.cpp: ########## @@ -0,0 +1,245 @@ +// 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 <glog/logging.h> + +#include <cstdio> +#include <regex> +#include <vector> + +#include "common/status.h" +#include "vec/columns/column.h" +#include "vec/columns/column_vector.h" +#include "vec/common/assert_cast.h" +#include "vec/core/types.h" +#include "vec/data_types/data_type_number.h" +#include "vec/functions/cast_type_to_either.h" +#include "vec/functions/simple_function_factory.h" + +namespace doris::vectorized { + +class FunctionFormatNumber : public IFunction { +public: + static constexpr auto name = "format_number"; + + static constexpr const char* UNITS[6] = {"", "K", "M", "B", "T", "Q"}; + + static FunctionPtr create() { return std::make_shared<FunctionFormatNumber>(); } + + String get_name() const override { return name; } + + size_t get_number_of_arguments() const override { return 1; } + + bool is_variadic() const override { return false; } + + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + return std::make_shared<DataTypeString>(); + } + + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + uint32_t result, size_t input_rows_count) const override { + auto column = block.get_by_position(arguments[0]).column; + const auto& column_data = + assert_cast<const ColumnVector<Float64>*>(column.get())->get_data(); + auto col_res = ColumnString::create(); + fmt::memory_buffer buffer; + + for (auto i = 0; i < input_rows_count; ++i) { + auto res_data = format_number(buffer, column_data[i]); + col_res->insert_data(res_data.data(), res_data.length()); + } + block.replace_by_position(result, std::move(col_res)); + return Status::OK(); + } + + std::string format_number(fmt::memory_buffer& buffer, double number) const { + buffer.clear(); + double abs_number = std::abs(number); + int unit_index = 0; + while (abs_number >= 1000 && unit_index < 5) { + abs_number /= 1000; + ++unit_index; + } + if (number < 0) { + fmt::format_to(buffer, "-"); + } + if (abs_number == 1) { + //eg: 1000 ---> 1K + fmt::format_to(buffer, "{}", abs_number); + } else if (abs_number < 10) { + //eg: 1239 ---> 1.24K only want to show 2 decimal + fmt::format_to(buffer, "{:.2f}", abs_number); + } else if (abs_number < 100) { + //eg: 12399999 ---> 12.4M only want to show 1 decimal + fmt::format_to(buffer, "{:.1f}", abs_number); + } else { + // eg: 999999999999999 ---> 1000T only want to show 0 decimal + fmt::format_to(buffer, "{:.0f}", abs_number); + } + fmt::format_to(buffer, UNITS[unit_index]); + return fmt::to_string(buffer); + } +}; + +class FunctionFormat : public IFunction { +public: + static constexpr auto name = "format"; + + static FunctionPtr create() { return std::make_shared<FunctionFormat>(); } + + String get_name() const override { return name; } + + size_t get_number_of_arguments() const override { return 0; } + + bool is_variadic() const override { return true; } + + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + return std::make_shared<DataTypeString>(); + } + + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + uint32_t result, size_t input_rows_count) const override { + DCHECK_GE(arguments.size(), 2); + bool valid = + cast_type(block.get_by_position(arguments[1]).type.get(), [&](const auto& type) { + using DataType = std::decay_t<decltype(type)>; + using T = typename DataType::FieldType; + using ColVecData = + std::conditional_t<IsNumber<T>, ColumnVector<T>, ColumnString>; + if (auto col = check_and_get_column<ColVecData>( + block.get_by_position(arguments[1]).column.get()) || + is_column_const(*block.get_by_position(arguments[1]).column)) { + execute_inner<ColVecData, T>(block, arguments, result, input_rows_count); + return true; + } + return false; + }); + if (!valid) { + return Status::RuntimeError( + "{}'s argument does not match the expected data type, type: {}, column: {}", + get_name(), block.get_by_position(arguments[1]).type->get_name(), + block.get_by_position(arguments[1]).column->dump_structure()); + } + return Status::OK(); + } + + template <typename F> + static bool cast_type(const IDataType* type, F&& f) { + return cast_type_to_either<DataTypeInt8, DataTypeInt16, DataTypeInt32, DataTypeInt64, + DataTypeInt128, DataTypeFloat32, DataTypeFloat64, + DataTypeString>(type, std::forward<F>(f)); + } + + template <typename ColVecData, typename T> + void execute_inner(Block& block, const ColumnNumbers& arguments, uint32_t result, + size_t input_rows_count) const { + size_t argument_size = arguments.size(); + std::vector<ColumnPtr> argument_columns(argument_size); + auto result_column = ColumnString::create(); + + // maybe most user is format(const, column), so only handle this case const column + if (argument_size == 2) { + std::vector<uint8_t> is_consts(argument_size); + std::tie(argument_columns[0], is_consts[0]) = + unpack_if_const(block.get_by_position(arguments[0]).column); + std::tie(argument_columns[1], is_consts[1]) = + unpack_if_const(block.get_by_position(arguments[1]).column); + execute_for_two_argument<ColVecData, T>(argument_columns, is_consts, + assert_cast<ColumnString*>(result_column.get()), + input_rows_count); + } else { + for (size_t i = 0; i < argument_size; ++i) { + argument_columns[i] = block.get_by_position(arguments[i]) + .column->convert_to_full_column_if_const(); + } + execute_for_others_arg<ColVecData, T>(argument_columns, + assert_cast<ColumnString*>(result_column.get()), + argument_size, input_rows_count); + } + + block.replace_by_position(result, std::move(result_column)); + } + + template <typename ColVecData, typename T> + void execute_for_two_argument(std::vector<ColumnPtr>& argument_columns, + std::vector<uint8_t>& is_consts, ColumnString* result_data_column, + size_t input_rows_count) const { + const auto& format_column = assert_cast<const ColumnString&>(*argument_columns[0].get()); + const auto& value_column = assert_cast<const ColVecData&>(*argument_columns[1].get()); + for (int i = 0; i < input_rows_count; ++i) { + auto format = + format_column.get_data_at(index_check_const(i, is_consts[0])).to_string_view(); + std::string res; + try { + if constexpr (std::is_same_v<ColVecData, ColumnString>) { + auto value = value_column.get_data_at(index_check_const(i, is_consts[1])); + res = fmt::format(format, value); + } else { + auto value = value_column.get_data()[i]; Review Comment: 这里应该也要用index_check_const(i, is_consts[1]) 判断一下？ -- This is an automated message from the Apache Git Service. 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