1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACE_PROCESSOR_DB_COLUMN_DENSE_NULL_OVERLAY_H_ 18 #define SRC_TRACE_PROCESSOR_DB_COLUMN_DENSE_NULL_OVERLAY_H_ 19 20 #include <cstdint> 21 #include <memory> 22 #include <optional> 23 #include <string> 24 25 #include "perfetto/trace_processor/basic_types.h" 26 #include "src/trace_processor/containers/bit_vector.h" 27 #include "src/trace_processor/db/column/data_layer.h" 28 #include "src/trace_processor/db/column/overlay_layer.h" 29 #include "src/trace_processor/db/column/types.h" 30 31 namespace perfetto::trace_processor::column { 32 33 // Overlay which introduces the layer of nullability but without changing the 34 // "spacing" of the underlying storage i.e. this overlay simply "masks" out 35 // rows in the underlying storage with nulls. 36 class DenseNullOverlay final : public OverlayLayer { 37 public: 38 explicit DenseNullOverlay(const BitVector* non_null); 39 ~DenseNullOverlay() override; 40 41 void Flatten(uint32_t* start, const uint32_t* end, uint32_t stride) override; 42 43 std::unique_ptr<DataLayerChain> MakeChain( 44 std::unique_ptr<DataLayerChain>, 45 ChainCreationArgs = ChainCreationArgs()); 46 47 private: 48 class ChainImpl : public DataLayerChain { 49 public: 50 ChainImpl(std::unique_ptr<DataLayerChain> inner, const BitVector* non_null); 51 52 SingleSearchResult SingleSearch(FilterOp, 53 SqlValue, 54 uint32_t) const override; 55 56 SearchValidationResult ValidateSearchConstraints(FilterOp, 57 SqlValue) const override; 58 59 RangeOrBitVector SearchValidated(FilterOp, SqlValue, Range) const override; 60 61 void IndexSearchValidated(FilterOp, SqlValue, Indices&) const override; 62 63 void StableSort(Token* start, Token* end, SortDirection) const override; 64 65 void Distinct(Indices&) const override; 66 67 std::optional<Token> MaxElement(Indices&) const override; 68 69 std::optional<Token> MinElement(Indices&) const override; 70 71 SqlValue Get_AvoidUsingBecauseSlow(uint32_t index) const override; 72 size()73 uint32_t size() const override { return non_null_->size(); } 74 DebugString()75 std::string DebugString() const override { return "DenseNullOverlay"; } 76 77 private: 78 std::unique_ptr<DataLayerChain> inner_; 79 const BitVector* non_null_ = nullptr; 80 }; 81 82 const BitVector* non_null_ = nullptr; 83 }; 84 85 } // namespace perfetto::trace_processor::column 86 87 #endif // SRC_TRACE_PROCESSOR_DB_COLUMN_DENSE_NULL_OVERLAY_H_ 88