1 /* 2 * Copyright (c) 2022 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 NATIVE_RDB_RDBPREDICATES_H 17 #define NATIVE_RDB_RDBPREDICATES_H 18 19 20 #include "abs_rdb_predicates.h" 21 22 namespace OHOS { 23 namespace NativeRdb { 24 class RdbPredicates : public AbsRdbPredicates { 25 public: 26 explicit RdbPredicates(std::string tableName); ~RdbPredicates()27 ~RdbPredicates() override {} 28 29 std::string GetJoinClause() const override; 30 RdbPredicates *CrossJoin(std::string tableName); 31 RdbPredicates *InnerJoin(std::string tableName); 32 RdbPredicates *LeftOuterJoin(std::string tableName); 33 RdbPredicates *Using(std::vector<std::string> fields); 34 RdbPredicates *On(std::vector<std::string> clauses); 35 36 private: 37 std::string ProcessJoins() const; 38 std::string GetGrammar(int type) const; 39 RdbPredicates *Join(int join, std::string tableName); 40 }; 41 } // namespace NativeRdb 42 } // namespace OHOS 43 44 #endif