69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include <boost/uuid/uuid.hpp>
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#include <boost/uuid/uuid_generators.hpp>
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#include <boost/uuid/uuid_io.hpp>
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#include "udf/udf.h"
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#include "vec/data_types/data_type_string.h"
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#include "vec/functions/simple_function_factory.h"
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namespace doris::vectorized {
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class Uuid : public IFunction {
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public:
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static constexpr auto name = "uuid";
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static constexpr size_t uuid_length = 36; //uuid fixed length
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static FunctionPtr create() { return std::make_shared<Uuid>(); }
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String get_name() const override { return name; }
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bool use_default_implementation_for_constants() const override { return false; }
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size_t get_number_of_arguments() const override { return 0; }
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bool is_variadic() const override { return false; }
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DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
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return std::make_shared<DataTypeString>();
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}
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Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
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size_t result, size_t input_rows_count) override {
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auto col_res = ColumnString::create();
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col_res->get_offsets().reserve(input_rows_count);
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col_res->get_chars().reserve(input_rows_count * uuid_length);
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boost::uuids::random_generator generator;
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for (int i = 0; i < input_rows_count; i++) {
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std::string uuid = boost::uuids::to_string(generator());
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DCHECK(uuid.length() == uuid_length);
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col_res->insert_data_without_reserve(uuid.c_str(), uuid.length());
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}
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block.replace_by_position(result, std::move(col_res));
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return Status::OK();
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}
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};
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void register_function_uuid(SimpleFunctionFactory& factory) {
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factory.register_function<Uuid>();
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}
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} // namespace doris::vectorized
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