45dfbeb8b3
This function requires one arguments just as ARRAY_AGG(col) and col means the column whose values you want to aggregate. This function Aggregates the values including NULL in a column into an array and returns a value of the ARRAY data type.
116 lines
5.6 KiB
C++
116 lines
5.6 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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#include "vec/aggregate_functions/aggregate_function_collect.h"
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#include <fmt/format.h>
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#include <boost/iterator/iterator_facade.hpp>
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#include <type_traits>
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#include "vec/aggregate_functions/aggregate_function_simple_factory.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, typename HasLimit, typename ShowNull>
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AggregateFunctionPtr do_create_agg_function_collect(bool distinct, const DataTypes& argument_types,
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const bool result_is_nullable) {
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if (argument_types[0]->is_nullable()) {
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if constexpr (ShowNull::value) {
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return creator_without_type::create_ignore_nullable<AggregateFunctionCollect<
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AggregateFunctionArrayAggData<T>, std::false_type, std::true_type>>(
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argument_types, result_is_nullable);
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}
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}
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if (distinct) {
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return creator_without_type::create<AggregateFunctionCollect<
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AggregateFunctionCollectSetData<T, HasLimit>, HasLimit, std::false_type>>(
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argument_types, result_is_nullable);
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} else {
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return creator_without_type::create<AggregateFunctionCollect<
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AggregateFunctionCollectListData<T, HasLimit>, HasLimit, std::false_type>>(
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argument_types, result_is_nullable);
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}
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}
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template <typename HasLimit, typename ShowNull>
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AggregateFunctionPtr create_aggregate_function_collect_impl(const std::string& name,
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const DataTypes& argument_types,
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const bool result_is_nullable) {
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bool distinct = false;
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if (name == "collect_set") {
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distinct = true;
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}
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WhichDataType which(remove_nullable(argument_types[0]));
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#define DISPATCH(TYPE) \
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if (which.idx == TypeIndex::TYPE) \
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return do_create_agg_function_collect<TYPE, HasLimit, ShowNull>(distinct, argument_types, \
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result_is_nullable);
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FOR_NUMERIC_TYPES(DISPATCH)
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FOR_DECIMAL_TYPES(DISPATCH)
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#undef DISPATCH
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if (which.is_date_or_datetime()) {
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return do_create_agg_function_collect<Int64, HasLimit, ShowNull>(distinct, argument_types,
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result_is_nullable);
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} else if (which.is_date_v2()) {
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return do_create_agg_function_collect<UInt32, HasLimit, ShowNull>(distinct, argument_types,
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result_is_nullable);
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} else if (which.is_date_time_v2()) {
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return do_create_agg_function_collect<UInt64, HasLimit, ShowNull>(distinct, argument_types,
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result_is_nullable);
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} else if (which.is_string()) {
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return do_create_agg_function_collect<StringRef, HasLimit, ShowNull>(
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distinct, argument_types, result_is_nullable);
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}
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LOG(WARNING) << fmt::format("unsupported input type {} for aggregate function {}",
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argument_types[0]->get_name(), name);
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return nullptr;
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}
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AggregateFunctionPtr create_aggregate_function_collect(const std::string& name,
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const DataTypes& argument_types,
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const bool result_is_nullable) {
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if (argument_types.size() == 1) {
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if (name == "array_agg") {
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return create_aggregate_function_collect_impl<std::false_type, std::true_type>(
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name, argument_types, result_is_nullable);
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} else {
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return create_aggregate_function_collect_impl<std::false_type, std::false_type>(
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name, argument_types, result_is_nullable);
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}
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}
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if (argument_types.size() == 2) {
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return create_aggregate_function_collect_impl<std::true_type, std::false_type>(
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name, argument_types, result_is_nullable);
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}
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LOG(WARNING) << fmt::format("number of parameters for aggregate function {}, should be 1 or 2",
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name);
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return nullptr;
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}
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void register_aggregate_function_collect_list(AggregateFunctionSimpleFactory& factory) {
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factory.register_function_both("collect_list", create_aggregate_function_collect);
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factory.register_function_both("collect_set", create_aggregate_function_collect);
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factory.register_function_both("array_agg", create_aggregate_function_collect);
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factory.register_alias("collect_list", "group_array");
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factory.register_alias("collect_set", "group_uniq_array");
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}
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} // namespace doris::vectorized
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