mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 07:30:54 +00:00
3fa9a39c68
Summary: - Introduced an include/ file dedicated to db-related debug functions to avoid making db.h more complex - Added debugging function, `GetAllKeyVersions()`, to return a listing of internal data for a range of user keys. The new `struct KeyVersion` exposes data similar to internal key without exposing any internal type. - Migrated the "ldb idump" subcommand to use this function - The API takes an inclusive-exclusive range to match behavior of "ldb idump". This will be quite annoying for users who want to query a single user key's versions :(. Closes https://github.com/facebook/rocksdb/pull/2232 Differential Revision: D4976007 Pulled By: ajkr fbshipit-source-id: cab375da53a7595d6575af2b7e3b776aa3ad793e
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
// This source code is also licensed under the GPLv2 license found in the
|
|
// COPYING file in the root directory of this source tree.
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "rocksdb/utilities/debug.h"
|
|
|
|
#include "db/db_impl.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
Status GetAllKeyVersions(DB* db, Slice begin_key, Slice end_key,
|
|
std::vector<KeyVersion>* key_versions) {
|
|
assert(key_versions != nullptr);
|
|
key_versions->clear();
|
|
|
|
DBImpl* idb = static_cast<DBImpl*>(db->GetRootDB());
|
|
auto icmp = InternalKeyComparator(idb->GetOptions().comparator);
|
|
RangeDelAggregator range_del_agg(icmp, {} /* snapshots */);
|
|
Arena arena;
|
|
ScopedArenaIterator iter(idb->NewInternalIterator(&arena, &range_del_agg));
|
|
|
|
if (!begin_key.empty()) {
|
|
InternalKey ikey;
|
|
ikey.SetMaxPossibleForUserKey(begin_key);
|
|
iter->Seek(ikey.Encode());
|
|
} else {
|
|
iter->SeekToFirst();
|
|
}
|
|
|
|
for (; iter->Valid(); iter->Next()) {
|
|
ParsedInternalKey ikey;
|
|
if (!ParseInternalKey(iter->key(), &ikey)) {
|
|
return Status::Corruption("Internal Key [" + iter->key().ToString() +
|
|
"] parse error!");
|
|
}
|
|
|
|
if (!end_key.empty() &&
|
|
icmp.user_comparator()->Compare(ikey.user_key, end_key) > 0) {
|
|
break;
|
|
}
|
|
|
|
key_versions->emplace_back(ikey.user_key.ToString() /* _user_key */,
|
|
iter->value().ToString() /* _value */,
|
|
ikey.sequence /* _sequence */,
|
|
static_cast<int>(ikey.type) /* _type */);
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif // ROCKSDB_LITE
|