| // Copyright (c) 2017-present, Facebook, Inc. All rights reserved. |
| // This source code is licensed under both the GPLv2 (found in the |
| // COPYING file in the root directory) and Apache 2.0 License |
| // (found in the LICENSE.Apache file in the root directory). |
| |
| #pragma once |
| |
| #ifndef ROCKSDB_LITE |
| |
| #include "rocksdb/db.h" |
| #include "rocksdb/types.h" |
| |
| namespace rocksdb { |
| |
| // Data associated with a particular version of a key. A database may internally |
| // store multiple versions of a same user key due to snapshots, compaction not |
| // happening yet, etc. |
| struct KeyVersion { |
| KeyVersion() : user_key(""), value(""), sequence(0), type(0) {} |
| |
| KeyVersion(const std::string& _user_key, const std::string& _value, |
| SequenceNumber _sequence, int _type) |
| : user_key(_user_key), value(_value), sequence(_sequence), type(_type) {} |
| |
| std::string user_key; |
| std::string value; |
| SequenceNumber sequence; |
| // TODO(ajkr): we should provide a helper function that converts the int to a |
| // string describing the type for easier debugging. |
| int type; |
| }; |
| |
| // Returns listing of all versions of keys in the provided user key range. |
| // The range is inclusive-inclusive, i.e., [`begin_key`, `end_key`]. |
| // The result is inserted into the provided vector, `key_versions`. |
| Status GetAllKeyVersions(DB* db, Slice begin_key, Slice end_key, |
| std::vector<KeyVersion>* key_versions); |
| |
| } // namespace rocksdb |
| |
| #endif // ROCKSDB_LITE |