59 lines
2.3 KiB
C++
59 lines
2.3 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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// This file is copied from
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// https://github.com/ClickHouse/ClickHouse/blob/master/src/Functions/Plus.cpp
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// and modified by Doris
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#include "vec/common/arithmetic_overflow.h"
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#include "vec/functions/function_binary_arithmetic.h"
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#include "vec/functions/simple_function_factory.h"
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namespace doris::vectorized {
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template <typename A, typename B>
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struct PlusImpl {
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using ResultType = typename NumberTraits::ResultOfAdditionMultiplication<A, B>::Type;
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static const constexpr bool allow_decimal = true;
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template <typename Result = ResultType>
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static inline Result apply(A a, B b) {
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/// Next everywhere, static_cast - so that there is no wrong result in expressions of the form Int64 c = UInt32(a) * Int32(-1).
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return static_cast<Result>(a) + b;
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}
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template <typename Result = DecimalV2Value>
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static inline DecimalV2Value apply(DecimalV2Value a, DecimalV2Value b) {
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return DecimalV2Value(a.value() + b.value());
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}
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/// Apply operation and check overflow. It's used for Decimal operations. @returns true if overflowed, false otherwise.
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template <typename Result = ResultType>
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static inline bool apply(A a, B b, Result& c) {
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return common::add_overflow(static_cast<Result>(a), b, c);
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}
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};
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struct NamePlus {
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static constexpr auto name = "add";
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};
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using FunctionPlus = FunctionBinaryArithmetic<PlusImpl, NamePlus, false>;
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void register_function_plus(SimpleFunctionFactory& factory) {
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factory.register_function<FunctionPlus>();
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}
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} // namespace doris::vectorized
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