lgbo-ustc commented on code in PR #4634: URL: https://github.com/apache/incubator-gluten/pull/4634#discussion_r1522350915
########## cpp-ch/local-engine/Storages/Parquet/ColumnIndexFilter.h: ########## @@ -0,0 +1,207 @@ +/* + * 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. + */ +#pragma once +#include <config.h> + +#if USE_PARQUET +#include <memory> +#include <Columns/IColumn.h> +#include <Core/Field.h> +#include <Interpreters/ActionsDAG.h> +#include <Storages/Parquet/RowRanges.h> +#include <parquet/page_index.h> + +namespace DB +{ +class RPNBuilderTreeNode; +class Context; +using ContextPtr = std::shared_ptr<const Context>; +} + +namespace local_engine +{ +class ColumnIndex; +using ColumnIndexPtr = std::unique_ptr<ColumnIndex>; +using PageIndexs = std::vector<int32_t>; +using ColumnIndexStore = std::unordered_map<std::string, ColumnIndexPtr>; + +struct PageIndexsBuilder +{ + static constexpr int32_t ALL_PAGES = -1; + template <typename Predict> + static PageIndexs filter(const size_t size, Predict predict) + { + PageIndexs pages; + for (int32_t from = 0; from != size; ++from) + if (predict(from)) + pages.emplace_back(from); + return pages; + } +}; + +struct RowRangesBuilder +{ + const int64_t rowGroupRowCount; // the total number of rows in the row-group + const std::vector<parquet::PageLocation> & pageLocations; + + RowRangesBuilder(int64_t row_group_row_count, const std::vector<parquet::PageLocation> & page_locations) + : rowGroupRowCount(row_group_row_count), pageLocations(page_locations) + { + } + + /** + * @param pageIndex + * the index of the page + * @return the index of the first row in the page + */ + size_t firstRowIndex(int pageIndex) const { return pageLocations[pageIndex].first_row_index; } + + /** + * @param pageIndex + * the index of the page + * @return the calculated index of the last row of the given page + */ + size_t lastRowIndex(size_t pageIndex) const + { + const size_t nextPageIndex = pageIndex + 1; + const size_t pageCount = std::ssize(pageLocations); + + const size_t lastRowIndex = (nextPageIndex >= pageCount ? rowGroupRowCount : pageLocations[nextPageIndex].first_row_index) - 1; + return lastRowIndex; + } + + RowRanges all() const { return RowRanges::createSingle(rowGroupRowCount); } + + RowRanges toRowRanges(const PageIndexs & pages) const + { + if (pages.size() == 1 && pages[0] == PageIndexsBuilder::ALL_PAGES) + return all(); + RowRanges row_ranges; + std::ranges::for_each(pages, [&](size_t pageIndex) { row_ranges.add(Range{firstRowIndex(pageIndex), lastRowIndex(pageIndex)}); }); + return row_ranges; + } +}; + +/** + * Column index containing min/max and null count values for the pages in a column chunk. It also implements methods + * to return the indexes of the matching pages. + * + * @see parquet::ColumnIndex + */ +class ColumnIndex +{ +public: + virtual ~ColumnIndex() = default; + + virtual const parquet::OffsetIndex & offsetIndex() const = 0; + + virtual bool hasParquetColumnIndex() const = 0; + + /// \brief Returns the row ranges where the column value is not equal to the given value. + /// column != literal => (min, max) = literal => + /// min != literal || literal != max + virtual PageIndexs notEq(const DB::Field & value) const = 0; + + /// \brief Returns the row ranges where the column value is equal to the given value. + /// column == literal => literal not in (min, max) => + /// min <= literal && literal <= max + virtual PageIndexs eq(const DB::Field & value) const = 0; + + /// \brief Returns the row ranges where the column value is greater than the given value. + /// column > literal + virtual PageIndexs gt(const DB::Field & value) const = 0; + + /// column >= literal + virtual PageIndexs gtEg(const DB::Field & value) const = 0; + + /// \brief Returns the row ranges where the column value is less than the given value. + /// column < literal + virtual PageIndexs lt(const DB::Field & value) const = 0; + + /// column <= literal + virtual PageIndexs ltEg(const DB::Field & value) const = 0; + + virtual PageIndexs in(const DB::ColumnPtr & column) const = 0; + + //TODO: parameters + static ColumnIndexPtr create( + const parquet::ColumnDescriptor * descr, + const std::shared_ptr<parquet::ColumnIndex> & column_index, + const std::shared_ptr<parquet::OffsetIndex> & offset_index); +}; + +template <typename DType> +class TypedColumnIndex : public ColumnIndex +{ +public: + using T = typename DType::c_type; +}; + +using ColumnIndexInt64 = TypedColumnIndex<parquet::Int64Type>; +using ColumnIndexInt32 = TypedColumnIndex<parquet::Int32Type>; + +class ColumnIndexFilter +{ +public: + /// The expression is stored as Reverse Polish Notation. + struct RPNElement Review Comment: What does RPN mean? -- This is an automated message from the Apache Git Service. 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