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_OVERLAY_H_ 18 #define SRC_TRACE_PROCESSOR_DB_COLUMN_OVERLAY_H_ 19 20 #include <variant> 21 #include "perfetto/ext/base/status_or.h" 22 #include "src/trace_processor/db/column.h" 23 #include "src/trace_processor/db/storage.h" 24 25 namespace perfetto { 26 namespace trace_processor { 27 namespace column { 28 29 // Column overlay introduce separation between column storage (vector of data) 30 // and state (nullability, sorting) and actions (filtering, expanding, joining) 31 // done on the storage. This is a composable design - one ColumnOverlay 32 // subclass might hold another subclass, and each of them implements all of the 33 // functions in it's own specific way. 34 class ColumnOverlay { 35 public: 36 virtual ~ColumnOverlay(); 37 38 // Clears the rows of RowMap, on which data don't match the FilterOp operation 39 // with SqlValue. Efficient. 40 virtual void Filter(FilterOp, SqlValue, RowMap&) const = 0; 41 42 // Sorts (ascending) provided vector of indices based on storage. 43 virtual void StableSort(uint32_t* rows, uint32_t rows_size) const = 0; 44 }; 45 } // namespace column 46 } // namespace trace_processor 47 } // namespace perfetto 48 49 #endif // SRC_TRACE_PROCESSOR_DB_COLUMN_OVERLAY_H_ 50