HappenLee commented on code in PR #33005: URL: https://github.com/apache/doris/pull/33005#discussion_r1544204394
########## be/src/vec/functions/function_uuid.cpp: ########## @@ -0,0 +1,214 @@ +// 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 <cctype> +#include <cstddef> +#include <cstring> +#include <memory> +#include <string_view> +#include <utility> + +#include "common/status.h" +#include "vec/aggregate_functions/aggregate_function.h" +#include "vec/columns/column.h" +#include "vec/columns/column_nullable.h" +#include "vec/columns/column_string.h" +#include "vec/columns/column_vector.h" +#include "vec/columns/columns_number.h" +#include "vec/common/assert_cast.h" +#include "vec/core/block.h" +#include "vec/core/column_numbers.h" +#include "vec/core/column_with_type_and_name.h" +#include "vec/core/types.h" +#include "vec/data_types/data_type.h" +#include "vec/data_types/data_type_nullable.h" +#include "vec/data_types/data_type_number.h" +#include "vec/data_types/data_type_string.h" +#include "vec/functions/function.h" +#include "vec/functions/simple_function_factory.h" + +namespace doris { +class FunctionContext; +} // namespace doris + +namespace doris::vectorized { +constexpr static int split_pos[4] = {8, 13, 18, 23}; // 8-4-4-4-12 +constexpr static char spliter = '-'; + +class FunctionUuidtoInt : public IFunction { +public: + static constexpr auto name = "uuid_to_int"; + + static FunctionPtr create() { return std::make_shared<FunctionUuidtoInt>(); } + + String get_name() const override { return name; } + + size_t get_number_of_arguments() const override { return 1; } + + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + return make_nullable(std::make_shared<DataTypeInt128>()); + } + + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + size_t result, size_t input_rows_count) const override { + const auto& arg_column = + assert_cast<const ColumnString&>(*block.get_by_position(arguments[0]).column); + + auto result_column = ColumnInt128::create(input_rows_count); + auto& result_data = result_column->get_data(); + auto null_column = ColumnUInt8::create(input_rows_count); + auto& null_map = null_column->get_data(); + + for (int row = 0; row < input_rows_count; row++) { + auto str = arg_column.get_data_at(row); + const auto* data = str.data; + Int128* result_cell = &result_data[row]; + *result_cell = 0; + null_map[row] = false; + + if (str.size == 36) { + if (data[split_pos[0]] != spliter || data[split_pos[1]] != spliter || + data[split_pos[2]] != spliter || data[split_pos[3]] != spliter) { + null_map[row] = true; + continue; + } + char new_data[32]; + memset(new_data, 0, sizeof(new_data)); + // ignore '-' + memcpy(new_data, data, 8); + memcpy(new_data + 8, data + split_pos[0] + 1, 4); + memcpy(new_data + 12, data + split_pos[1] + 1, 4); + memcpy(new_data + 16, data + split_pos[2] + 1, 4); + memcpy(new_data + 20, data + split_pos[3] + 1, 12); + + if (!serialize(new_data, (char*)result_cell, 32).ok()) { + null_map[row] = true; + continue; + } + } else if (str.size == 32) { + if (!serialize(data, (char*)result_cell, 32).ok()) { + null_map[row] = true; + continue; + } + } else { + null_map[row] = true; + continue; + } + } + + block.replace_by_position( + result, ColumnNullable::create(std::move(result_column), std::move(null_column))); + return Status::OK(); + } + + // use char* to write dst is the only legal way by 'restrict aliasing rule' + static Status serialize(const char* __restrict src, char* __restrict dst, size_t length) { + char target; // 8bit, contains 2 char input + auto translate = [&target](const char ch) { + if (isdigit(ch)) { + target += ch - '0'; + } else if (ch >= 'a' && ch <= 'f') { + target += ch - 'a' + 10; + } else if (ch >= 'A' && ch <= 'F') { + target += ch - 'A' + 10; + } else { + return Status::InvalidArgument(""); + } + return Status::OK(); + }; + for (size_t i = 0; i < length; i += 2, src++, dst++) { + target = 0; + RETURN_IF_ERROR(translate(*src)); + + src++; + target <<= 4; + RETURN_IF_ERROR(translate(*src)); + *dst = target; + } + + return Status::OK(); + } +}; + +class FunctionInttoUuid : public IFunction { +public: + static constexpr auto name = "int_to_uuid"; + + static FunctionPtr create() { return std::make_shared<FunctionInttoUuid>(); } + + String get_name() const override { return name; } + + size_t get_number_of_arguments() const override { return 1; } + + 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, + size_t result, size_t input_rows_count) const override { + const auto& arg_column = + assert_cast<const ColumnInt128&>(*block.get_by_position(arguments[0]).column); + auto result_column = ColumnString::create(); + + for (int row = 0; row < input_rows_count; row++) { + const Int128* arg = &arg_column.get_data()[row]; + unsigned char result[32]; + deserialize((char*)arg, result, 16); // 16 chars, 32 data + + // insert delimiter + char format_result[36]; + memcpy(format_result, result, 8); + memcpy(format_result + split_pos[0] + 1, result + 8, 4); + memcpy(format_result + split_pos[1] + 1, result + 12, 4); + memcpy(format_result + split_pos[2] + 1, result + 16, 4); + memcpy(format_result + split_pos[3] + 1, result + 20, 12); + for (auto pos : split_pos) { + format_result[pos] = spliter; + } + + result_column->insert_data(format_result, 36); + } + block.replace_by_position(result, std::move(result_column)); + return Status::OK(); + } + + // use char* to read src is the only legal way by 'restrict aliasing rule' + static void deserialize(const char* __restrict src, unsigned char* __restrict dst, + size_t length) { + auto transform = [](char ch) -> unsigned char { + LOG(WARNING) << (unsigned int)ch; + if (ch < 10) { + return ch + '0'; + } else { + return ch - 10 + 'a'; + } + }; + for (size_t i = 0; i < length; i++, src++) { Review Comment: check the code simd？ -- This is an automated message from the Apache Git Service. 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