be/src/vec/aggregate_functions/aggregate_function_uniq.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/AggregateFunctionUniq.cpp
// and modified by Doris

#include "vec/aggregate_functions/aggregate_function_uniq.h"

#include <string>

#include "runtime/define_primitive_type.h"
#include "vec/aggregate_functions/aggregate_function_simple_factory.h"
#include "vec/aggregate_functions/helpers.h"
#include "vec/common/hash_table/hash.h" // IWYU pragma: keep
#include "vec/data_types/data_type.h"

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

template <template <PrimitiveType> class Data>
AggregateFunctionPtr create_aggregate_function_uniq(const std::string& name,
                                                    const DataTypes& argument_types,
                                                    const DataTypePtr& result_type,
                                                    const bool result_is_nullable,
                                                    const AggregateFunctionAttr& attr) {
    return creator_with_type_list<
            TYPE_BOOLEAN, TYPE_TINYINT, TYPE_SMALLINT, TYPE_INT, TYPE_BIGINT, TYPE_LARGEINT,
            TYPE_DECIMAL32, TYPE_DECIMAL64, TYPE_DECIMAL128I, TYPE_DECIMAL256, TYPE_VARCHAR,
            TYPE_ARRAY, TYPE_FLOAT, TYPE_DOUBLE, TYPE_DATEV2, TYPE_DATETIMEV2, TYPE_TIMESTAMPTZ,
            TYPE_VARBINARY>::create<AggregateFunctionUniq, Data>(argument_types, result_is_nullable,
                                                                 attr);
}

void register_aggregate_function_uniq(AggregateFunctionSimpleFactory& factory) {
    AggregateFunctionCreator creator =
            create_aggregate_function_uniq<AggregateFunctionUniqExactData>;
    factory.register_function_both("multi_distinct_count", creator);
}

} // namespace doris::vectorized