be/src/vec/aggregate_functions/aggregate_function_percentile_reservoir.cpp

// Licensed to the Apache Software Foundation (ASF) under one
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// 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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// specific language governing permissions and limitations
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#include "vec/aggregate_functions/aggregate_function_percentile_reservoir.h"

#include "runtime/define_primitive_type.h"
#include "vec/aggregate_functions/aggregate_function_simple_factory.h"
#include "vec/aggregate_functions/helpers.h"

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

AggregateFunctionPtr createAggregateFunctionPercentileReservoir(const std::string& name,
                                                                const DataTypes& argument_types,
                                                                const DataTypePtr& result_type,
                                                                const bool result_is_nullable,
                                                                const AggregateFunctionAttr& attr) {
    if (argument_types.empty()) {
        throw doris::Exception(ErrorCode::INTERNAL_ERROR,
                               "Aggregate function {} requires at least one argument", name);
    }

    const DataTypePtr& argument_type = remove_nullable(argument_types[0]);
    if (argument_types[0]->get_primitive_type() == TYPE_DOUBLE) {
        return creator_without_type::create<
                AggregateFunctionPercentileReservoir<QuantileReservoirSampler>>(
                argument_types, result_is_nullable, attr);
    }
    return nullptr;
}

void register_aggregate_function_percentile_reservoir(AggregateFunctionSimpleFactory& factory) {
    factory.register_function_both("percentile_reservoir",
                                   createAggregateFunctionPercentileReservoir);
}

#include "common/compile_check_end.h"
} // namespace doris::vectorized