adonis0147 commented on code in PR #9056: URL: https://github.com/apache/incubator-doris/pull/9056#discussion_r895713249
########## be/src/vec/functions/array/function_array_mapped.h: ########## @@ -0,0 +1,76 @@ +// 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/Functions/array/FunctionArrayMapped.h +// and modified by Doris + +#include "vec/columns/column.h" +#include "vec/columns/column_nullable.h" +#include "vec/data_types/data_type_array.h" +#include "vec/data_types/data_type_nullable.h" +#include "vec/functions/function.h" + +namespace doris { +namespace vectorized { + +/** Higher-order functions for arrays. + * These functions optionally apply a map (transform) to array (or multiple arrays of identical size) by lambda function, + * and return some result based on that transformation. + * + * Examples: + * arrayMap(x1,...,xn -> expression, array1,...,arrayn) - apply the expression to each element of the array (or set of parallel arrays). + * arrayFilter(x -> predicate, array) - leave in the array only the elements for which the expression is true. + * + * For some functions arrayCount, arrayExists, arrayAll, an overload of the form f(array) is available, + * which works in the same way as f(x -> x, array). + * + * See the example of Impl template parameter in arrayMap.cpp + */ +template <typename Impl, typename Name> +class FunctionArrayMapped : public IFunction { +public: + static constexpr auto name = Name::name; + static FunctionPtr create() { return std::make_shared<FunctionArrayMapped>(); } + + String get_name() const override { return name; } + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + size_t result, size_t input_rows_count) override { + const auto& typed_column = block.get_by_position(arguments[0]); + const typename Impl::column_type* column_array; + if (typed_column.column->is_nullable()) { + column_array = check_and_get_column<const typename Impl::column_type>( + static_cast<const ColumnNullable*>(typed_column.column.get()) + ->get_nested_column_ptr() + .get()); + } else { + column_array = check_and_get_column<const typename Impl::column_type>( + typed_column.column.get()); + } + const auto* data_type_array = + static_cast<const DataTypeArray*>(remove_nullable(typed_column.type).get()); + return Impl::execute(block, result, data_type_array, *column_array); + } + size_t get_number_of_arguments() const override { return 1; } + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + const DataTypeArray* data_type_array = + static_cast<const DataTypeArray*>(remove_nullable(arguments[0]).get()); + return Impl::get_return_type(data_type_array); Review Comment: No need to modify due to [function.cpp:304](https://github.com/apache/incubator-doris/blob/master/be/src/vec/functions/function.cpp#L304) will add nullable to the type returned. ########## be/src/vec/functions/array/function_array_aggregation.cpp: ########## @@ -0,0 +1,300 @@ +// 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/Functions/array/arrayAggregation.cpp +// and modified by Doris + +#include <type_traits> + +#include "vec/aggregate_functions/aggregate_function_avg.h" +#include "vec/aggregate_functions/aggregate_function_min_max.h" +#include "vec/aggregate_functions/aggregate_function_null.h" +#include "vec/aggregate_functions/aggregate_function_product.h" +#include "vec/aggregate_functions/aggregate_function_sum.h" +#include "vec/aggregate_functions/helpers.h" +#include "vec/columns/column_nullable.h" +#include "vec/common/arena.h" +#include "vec/core/types.h" +#include "vec/data_types/data_type.h" +#include "vec/data_types/data_type_nullable.h" +#include "vec/functions/array/function_array_mapped.h" +#include "vec/functions/simple_function_factory.h" + +namespace doris { +namespace vectorized { + +enum class AggregateOperation { MIN, MAX, SUM, AVERAGE, PRODUCT }; + +template <typename Element, AggregateOperation operation> +struct ArrayAggregateResultImpl; + +template <typename Element> +struct ArrayAggregateResultImpl<Element, AggregateOperation::MIN> { + using Result = Element; +}; + +template <typename Element> +struct ArrayAggregateResultImpl<Element, AggregateOperation::MAX> { + using Result = Element; +}; + +template <typename Element> +struct ArrayAggregateResultImpl<Element, AggregateOperation::AVERAGE> { + using Result = std::conditional_t<IsDecimalNumber<Element>, Decimal128, Float64>; +}; + +template <typename Element> +struct ArrayAggregateResultImpl<Element, AggregateOperation::PRODUCT> { + using Result = std::conditional_t<IsDecimalNumber<Element>, Decimal128, Float64>; +}; + +template <typename Element> +struct ArrayAggregateResultImpl<Element, AggregateOperation::SUM> { + using Result = std::conditional_t< + IsDecimalNumber<Element>, Decimal128, + std::conditional_t<IsFloatNumber<Element>, Float64, + std::conditional_t<std::is_same_v<Element, Int128>, Int128, Int64>>>; +}; + +template <typename Element, AggregateOperation operation> +using ArrayAggregateResult = typename ArrayAggregateResultImpl<Element, operation>::Result; + +template <AggregateOperation operation> +struct AggregateFunctionImpl; + +template <> +struct AggregateFunctionImpl<AggregateOperation::SUM> { Review Comment: Added. -- This is an automated message from the Apache Git Service. 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