1 /* 2 * Copyright (C) 2018 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_SQLITE_WINDOW_OPERATOR_TABLE_H_ 18 #define SRC_TRACE_PROCESSOR_SQLITE_WINDOW_OPERATOR_TABLE_H_ 19 20 #include <limits> 21 #include <memory> 22 23 #include "src/trace_processor/sqlite/sqlite_table.h" 24 25 namespace perfetto { 26 namespace trace_processor { 27 28 class TraceStorage; 29 30 class WindowOperatorTable : public SqliteTable { 31 public: 32 enum Column { 33 kRowId = 0, 34 kQuantum = 1, 35 kWindowStart = 2, 36 kWindowDur = 3, 37 kTs = 4, 38 kDuration = 5, 39 kQuantumTs = 6 40 }; 41 class Cursor : public SqliteTable::Cursor { 42 public: 43 Cursor(WindowOperatorTable*); 44 45 // Implementation of SqliteTable::Cursor. 46 int Filter(const QueryConstraints& qc, 47 sqlite3_value**, 48 FilterHistory) override; 49 int Next() override; 50 int Eof() override; 51 int Column(sqlite3_context*, int N) override; 52 53 private: 54 // Defines the data to be generated by the table. 55 enum FilterType { 56 // Returns all the spans. 57 kReturnAll = 0, 58 // Only returns the first span of the table. Useful for UPDATE operations. 59 kReturnFirst = 1, 60 }; 61 62 int64_t window_start_ = 0; 63 int64_t window_end_ = 0; 64 int64_t step_size_ = 0; 65 66 int64_t current_ts_ = 0; 67 int64_t quantum_ts_ = 0; 68 int64_t row_id_ = 0; 69 70 FilterType filter_type_ = FilterType::kReturnAll; 71 72 WindowOperatorTable* table_ = nullptr; 73 }; 74 75 static void RegisterTable(sqlite3* db, const TraceStorage* storage); 76 77 WindowOperatorTable(sqlite3*, const TraceStorage*); 78 79 // Table implementation. 80 util::Status Init(int, const char* const*, Schema* schema) override; 81 std::unique_ptr<SqliteTable::Cursor> CreateCursor() override; 82 int BestIndex(const QueryConstraints&, BestIndexInfo*) override; 83 int ModifyConstraints(QueryConstraints* qc) override; 84 int Update(int, sqlite3_value**, sqlite3_int64*) override; 85 86 private: 87 int64_t quantum_ = 0; 88 int64_t window_start_ = 0; 89 90 // max of int64_t because SQLite technically only supports int64s and not 91 // uint64s. 92 int64_t window_dur_ = std::numeric_limits<int64_t>::max(); 93 }; 94 } // namespace trace_processor 95 } // namespace perfetto 96 97 #endif // SRC_TRACE_PROCESSOR_SQLITE_WINDOW_OPERATOR_TABLE_H_ 98