| // Copyright 2022 The Chromium Authors | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| #ifndef COMPONENTS_DATABASE_UTILS_UPPER_BOUND_STRING_H_ | |
| #define COMPONENTS_DATABASE_UTILS_UPPER_BOUND_STRING_H_ | |
| #include <string> | |
| namespace database_utils { | |
| // Returns a string with the following property: | |
| // Condition (str >= prefix AND str < UpperBoundString(prefix)) | |
| // is satisfied for all strs that start with prefix and only for them. | |
| // This can be used for optimization purposes to avoid using the LIKE operator. | |
| // prefix must be a UTF-8 string. | |
| std::string UpperBoundString(const std::string& prefix); | |
| } // namespace database_utils | |
| #endif // COMPONENTS_DATABASE_UTILS_UPPER_BOUND_STRING_H_ |