1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef MEASURE_TABLE_H 17 #define MEASURE_TABLE_H 18 19 #include "table_base.h" 20 #include "trace_data_cache.h" 21 22 namespace SysTuning { 23 namespace TraceStreamer { 24 class MeasureTable : public TableBase { 25 public: 26 explicit MeasureTable(const TraceDataCache* dataCache); 27 ~MeasureTable() override; 28 std::unique_ptr<TableBase::Cursor> CreateCursor() override; 29 30 private: 31 void EstimateFilterCost(FilterConstraints& fc, EstimatedIndexInfo& ei) override; 32 void FilterByConstraint(FilterConstraints& fc, double& filterCost, size_t rowCount); 33 bool CanFilterSorted(const char op, size_t& rowCount) const; 34 35 class Cursor : public TableBase::Cursor { 36 public: 37 explicit Cursor(const TraceDataCache* dataCache, TableBase* table); 38 ~Cursor() override; 39 int Filter(const FilterConstraints& fc, sqlite3_value** argv) override; 40 int Column(int column) const override; 41 private: 42 const Measure& measureObj; 43 }; 44 }; 45 } // namespace TraceStreamer 46 } // namespace SysTuning 47 48 #endif // MEASURE_TABLE_H 49