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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/07/11 04:00:07 UTC
[GitHub] [doris] carlvinhust2012 commented on a diff in pull request #10598: [feature-wip] (array-type) add the array_sort function
carlvinhust2012 commented on code in PR #10598:
URL: https://github.com/apache/doris/pull/10598#discussion_r917524082
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be/src/vec/functions/array/function_array_sort.h:
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@@ -0,0 +1,288 @@
+// 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/arraySort.cpp
+// and modified by Doris
+#pragma once
+
+#include "vec/columns/column_array.h"
+#include "vec/columns/column_const.h"
+#include "vec/data_types/data_type_array.h"
+#include "vec/data_types/data_type_number.h"
+#include "vec/functions/function.h"
+#include "vec/functions/function_helpers.h"
+
+namespace doris::vectorized {
+
+class FunctionArraySort : public IFunction {
+public:
+ static constexpr auto name = "array_sort";
+ static FunctionPtr create() { return std::make_shared<FunctionArraySort>(); }
+ using NullMapType = PaddedPODArray<UInt8>;
+
+ /// Get function name.
+ String get_name() const override { return name; }
+
+ bool is_variadic() const override { return false; }
+
+ size_t get_number_of_arguments() const override { return 1; }
+
+ DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
+ DCHECK(is_array(arguments[0]))
+ << "first argument for function: " << name << " should be DataTypeArray"
+ << " and arguments[0] is " << arguments[0]->get_name();
+ return arguments[0];
+ }
+
+ Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
+ size_t result, size_t input_rows_count) override {
+ ColumnPtr src_column =
+ block.get_by_position(arguments[0]).column->convert_to_full_column_if_const();
+ const auto& src_column_array = check_and_get_column<ColumnArray>(*src_column);
+ if (!src_column_array) {
+ return Status::RuntimeError(
+ fmt::format("unsupported types for function {}({})", get_name(),
+ block.get_by_position(arguments[0]).type->get_name()));
+ }
+ const auto& src_offsets = src_column_array->get_offsets();
+ const auto* src_nested_column = &src_column_array->get_data();
+ DCHECK(src_nested_column != nullptr);
+
+ DataTypePtr src_column_type = block.get_by_position(arguments[0]).type;
+ auto nested_type = assert_cast<const DataTypeArray&>(*src_column_type).get_nested_type();
+ auto dest_column_ptr = ColumnArray::create(nested_type->create_column(),
+ ColumnArray::ColumnOffsets::create());
+ IColumn* dest_nested_column = &dest_column_ptr->get_data();
+ ColumnArray::Offsets& dest_offsets = dest_column_ptr->get_offsets();
+ DCHECK(dest_nested_column != nullptr);
+ dest_nested_column->reserve(src_nested_column->size());
+ dest_offsets.reserve(input_rows_count);
+
+ const NullMapType* src_null_map = nullptr;
+ if (src_nested_column->is_nullable()) {
+ const ColumnNullable* src_nested_nullable_col =
+ check_and_get_column<ColumnNullable>(*src_nested_column);
+ src_nested_column = src_nested_nullable_col->get_nested_column_ptr();
+ src_null_map = &src_nested_nullable_col->get_null_map_column().get_data();
+ }
+
+ NullMapType* dest_null_map = nullptr;
+ if (dest_nested_column->is_nullable()) {
+ ColumnNullable* dest_nested_nullable_col =
+ reinterpret_cast<ColumnNullable*>(dest_nested_column);
+ dest_nested_column = dest_nested_nullable_col->get_nested_column_ptr();
+ dest_null_map = &dest_nested_nullable_col->get_null_map_column().get_data();
+ }
+
+ auto res_val = _execute_by_type(*src_nested_column, src_offsets, *dest_nested_column,
+ dest_offsets, src_null_map, dest_null_map, nested_type);
+ if (!res_val) {
+ return Status::RuntimeError(
+ fmt::format("execute failed or unsupported types for function {}({})",
+ get_name(), block.get_by_position(arguments[0]).type->get_name()));
+ }
+
+ block.replace_by_position(result, std::move(dest_column_ptr));
+ return Status::OK();
+ }
+
+private:
+ // sort the non-null element according to the permutation
+ template <typename SrcDataType>
+ void _sort_by_permutation(ColumnArray::Offset& prev_offset,
+ const ColumnArray::Offset& curr_offset,
+ const SrcDataType* src_data_concrete, const IColumn& src_column,
+ const NullMapType* src_null_map, IColumn::Permutation& permutation) {
+ for (ColumnArray::Offset j = prev_offset; j < curr_offset - 1; ++j) {
+ if (src_null_map && (*src_null_map)[j]) {
+ continue;
+ }
+ for (ColumnArray::Offset k = j + 1; k < curr_offset; ++k) {
+ if (src_null_map && (*src_null_map)[k]) {
+ continue;
+ }
+ int result = src_data_concrete->compare_at(permutation[j], permutation[k],
+ src_column, 1);
+ if (result > 0) {
+ auto temp = permutation[j];
+ permutation[j] = permutation[k];
+ permutation[k] = temp;
+ }
+ }
+ }
+ return;
+ }
+
+ template <typename ColumnType>
+ bool _execute_number(const IColumn& src_column, const ColumnArray::Offsets& src_offsets,
+ IColumn& dest_column, ColumnArray::Offsets& dest_offsets,
+ const NullMapType* src_null_map, NullMapType* dest_null_map) {
+ using NestType = typename ColumnType::value_type;
+ const ColumnType* src_data_concrete = reinterpret_cast<const ColumnType*>(&src_column);
+ if (!src_data_concrete) {
+ return false;
+ }
+ const PaddedPODArray<NestType>& src_datas = src_data_concrete->get_data();
+
+ ColumnType& dest_data_concrete = reinterpret_cast<ColumnType&>(dest_column);
+ PaddedPODArray<NestType>& dest_datas = dest_data_concrete.get_data();
+
+ ColumnArray::Offset prev_src_offset = 0;
+ IColumn::Permutation permutation(src_column.size());
+ for (size_t i = 0; i < src_column.size(); ++i) {
+ permutation[i] = i;
+ }
+
+ for (auto curr_src_offset : src_offsets) {
+ // filter and insert null element first
+ for (ColumnArray::Offset j = prev_src_offset; j < curr_src_offset; ++j) {
+ if (src_null_map && (*src_null_map)[j]) {
+ DCHECK(dest_null_map != nullptr);
+ (*dest_null_map).push_back(true);
+ dest_datas.push_back(NestType());
+ }
+ }
+
+ _sort_by_permutation<ColumnType>(prev_src_offset, curr_src_offset, src_data_concrete,
+ src_column, src_null_map, permutation);
+
+ // insert non-null element after sort by permutation
+ for (ColumnArray::Offset j = prev_src_offset; j < curr_src_offset; ++j) {
Review Comment:
if the array is [1, null, 2, null, 3] and just use one loop, the dest_datas will push_back [1, null, 2, null, 3].
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