| // Copyright 2022 The Chromium Authors. All rights reserved. |
| // 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_ |
