65 lines
2.6 KiB
C++
65 lines
2.6 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/AggregateFunctions/AggregateFunctionAvg.cpp
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// and modified by Doris
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#include "vec/aggregate_functions/aggregate_function_avg.h"
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#include "common/logging.h"
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#include "vec/aggregate_functions/aggregate_function_simple_factory.h"
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#include "vec/aggregate_functions/factory_helpers.h"
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#include "vec/aggregate_functions/helpers.h"
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namespace doris::vectorized {
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template <typename T>
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struct Avg {
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using FieldType = std::conditional_t<IsDecimalNumber<T>, Decimal128, NearestFieldType<T>>;
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using Function = AggregateFunctionAvg<T, AggregateFunctionAvgData<FieldType>>;
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};
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template <typename T>
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using AggregateFuncAvg = typename Avg<T>::Function;
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AggregateFunctionPtr create_aggregate_function_avg(const std::string& name,
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const DataTypes& argument_types,
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const Array& parameters,
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const bool result_is_nullable) {
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assert_no_parameters(name, parameters);
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assert_unary(name, argument_types);
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AggregateFunctionPtr res;
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DataTypePtr data_type = argument_types[0];
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if (is_decimal(data_type))
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res.reset(
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create_with_decimal_type<AggregateFuncAvg>(*data_type, *data_type, argument_types));
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else
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res.reset(create_with_numeric_type<AggregateFuncAvg>(*data_type, argument_types));
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if (!res) {
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LOG(WARNING) << fmt::format("Illegal type {} of argument for aggregate function {}",
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argument_types[0]->get_name(), name);
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}
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return res;
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}
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void register_aggregate_function_avg(AggregateFunctionSimpleFactory& factory) {
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factory.register_function("avg", create_aggregate_function_avg);
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}
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} // namespace doris::vectorized
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