be/src/exprs/aggregate/aggregate_function_approx_count_distinct.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
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "exprs/aggregate/aggregate_function_approx_count_distinct.h"

#include "core/data_type/data_type.h"
#include "core/data_type/define_primitive_type.h"
#include "exprs/aggregate/helpers.h"

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

AggregateFunctionPtr create_aggregate_function_approx_count_distinct(
        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_FLOAT, TYPE_DOUBLE, TYPE_DECIMALV2, TYPE_DECIMAL32, TYPE_DECIMAL64,
            TYPE_DECIMAL128I, TYPE_DECIMAL256, TYPE_VARCHAR, TYPE_DATEV2, TYPE_DATETIMEV2,
            TYPE_IPV4, TYPE_IPV6,
            TYPE_TIMESTAMPTZ>::create<AggregateFunctionApproxCountDistinct>(argument_types,
                                                                            result_is_nullable,
                                                                            attr);
}

void register_aggregate_function_approx_count_distinct(AggregateFunctionSimpleFactory& factory) {
    factory.register_function_both("approx_count_distinct",
                                   create_aggregate_function_approx_count_distinct);
    factory.register_alias("approx_count_distinct", "ndv");
}

} // namespace doris