87 lines
3.0 KiB
C++
87 lines
3.0 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/FunctionMathUnary.h
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// and modified by Doris
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#pragma once
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#include "vec/columns/column_decimal.h"
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#include "vec/columns/columns_number.h"
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#include "vec/core/call_on_type_index.h"
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#include "vec/core/types.h"
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#include "vec/data_types/data_type_decimal.h"
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#include "vec/data_types/data_type_number.h"
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#include "vec/functions/function.h"
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#include "vec/functions/function_helpers.h"
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namespace doris::vectorized {
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template <typename Impl>
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class FunctionMathUnary : public IFunction {
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public:
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using IFunction::execute;
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static constexpr auto name = Impl::name;
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static FunctionPtr create() { return std::make_shared<FunctionMathUnary>(); }
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private:
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String get_name() const override { return name; }
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size_t get_number_of_arguments() const override { return 1; }
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DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
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return std::make_shared<typename Impl::Type>();
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}
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static void execute_in_iterations(const double* src_data, double* dst_data, size_t size) {
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for (size_t i = 0; i < size; i++) {
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Impl::execute(&src_data[i], &dst_data[i]);
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}
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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) const override {
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const auto* col =
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assert_cast<const ColumnFloat64*>(block.get_by_position(arguments[0]).column.get());
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const auto& src_data = col->get_data();
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const size_t size = src_data.size();
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auto dst = ColumnFloat64::create();
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auto& dst_data = dst->get_data();
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dst_data.resize(size);
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execute_in_iterations(col->get_data().data(), dst_data.data(), size);
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block.replace_by_position(result, std::move(dst));
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return Status::OK();
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}
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};
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template <typename Name, Float64(Function)(Float64)>
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struct UnaryFunctionPlain {
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using Type = DataTypeFloat64;
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static constexpr auto name = Name::name;
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template <typename T, typename U>
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static void execute(const T* src, U* dst) {
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*dst = static_cast<Float64>(Function(*src));
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}
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};
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} // namespace doris::vectorized
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