1 /* 2 * Copyright (c) 2023 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 SQLITE_META_EXECUTOR_H 17 #define SQLITE_META_EXECUTOR_H 18 19 #include "sqlite_utils.h" 20 21 namespace DistributedDB { 22 class SqliteMetaExecutor { 23 public: 24 enum class MetaMode { 25 KV = 0, 26 KV_ATTACH = 1, 27 RDB = 2 28 }; 29 static int GetMetaKeysByKeyPrefix(const std::string &keyPre, sqlite3 *dbHandle, MetaMode metaMode, bool isMemDb, 30 std::set<std::string> &outKeys); 31 32 static int GetAllKeys(sqlite3_stmt *statement, bool isMemDb, std::vector<Key> &keys); 33 34 static int GetExistsDevicesFromMeta(sqlite3 *dbHandle, MetaMode metaMode, 35 bool isMemDb, std::set<std::string> &devices); 36 private: 37 static constexpr const char *SELECT_ATTACH_META_KEYS_BY_PREFIX = 38 "SELECT key FROM meta.meta_data where key like ?;"; 39 40 static constexpr const char *SELECT_META_KEYS_BY_PREFIX = 41 "SELECT key FROM meta_data where key like ?;"; 42 43 static constexpr const char *SELECT_RDB_META_KEYS_BY_PREFIX = 44 "SELECT key FROM naturalbase_rdb_aux_metadata where key like ?;"; 45 }; 46 } // DistributedDB 47 #endif // SQLITE_META_EXECUTOR_H 48