be/src/vec/aggregate_functions/aggregate_function_count.cpp

// 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.
// This file is copied from
// https://github.com/ClickHouse/ClickHouse/blob/master/src/AggregateFunctions/AggregateFunctionCount.cpp
// and modified by Doris

#include "vec/aggregate_functions/aggregate_function_count.h"

#include <string>

#include "vec/aggregate_functions/aggregate_function_simple_factory.h"
#include "vec/aggregate_functions/factory_helpers.h"

namespace doris::vectorized {
#include "common/compile_check_begin.h"

AggregateFunctionPtr create_aggregate_function_count(const std::string& name,
                                                     const DataTypes& argument_types,
                                                     const DataTypePtr& result_type,
                                                     const bool result_is_nullable,
                                                     const AggregateFunctionAttr& attr) {
    assert_arity_range(name, argument_types, 0, 1);

    return std::make_shared<AggregateFunctionCount>(argument_types);
}

AggregateFunctionPtr create_aggregate_function_count_not_null_unary(
        const std::string& name, const DataTypes& argument_types, const DataTypePtr& result_type,
        const bool result_is_nullable, const AggregateFunctionAttr& attr) {
    assert_arity_range(name, argument_types, 0, 1);

    return std::make_shared<AggregateFunctionCountNotNullUnary>(argument_types);
}

void register_aggregate_function_count(AggregateFunctionSimpleFactory& factory) {
    factory.register_function("count", create_aggregate_function_count);
    factory.register_function("count", create_aggregate_function_count_not_null_unary, true);
}

} // namespace doris::vectorized