rocksdb/utilities/debug.cc

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// Copyright (c) 2011-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).
#ifndef ROCKSDB_LITE
#include "rocksdb/utilities/debug.h"
#include "db/db_impl/db_impl.h"
namespace ROCKSDB_NAMESPACE {
Status GetAllKeyVersions(DB* db, Slice begin_key, Slice end_key,
size_t max_num_ikeys,
std::vector<KeyVersion>* key_versions) {
if (nullptr == db) {
return Status::InvalidArgument("db cannot be null.");
}
return GetAllKeyVersions(db, db->DefaultColumnFamily(), begin_key, end_key,
max_num_ikeys, key_versions);
}
Status GetAllKeyVersions(DB* db, ColumnFamilyHandle* cfh, Slice begin_key,
Slice end_key, size_t max_num_ikeys,
std::vector<KeyVersion>* key_versions) {
if (nullptr == db) {
return Status::InvalidArgument("db cannot be null.");
}
if (nullptr == cfh) {
return Status::InvalidArgument("Column family handle cannot be null.");
}
if (nullptr == key_versions) {
return Status::InvalidArgument("key_versions cannot be null.");
}
key_versions->clear();
DBImpl* idb = static_cast<DBImpl*>(db->GetRootDB());
auto icmp = InternalKeyComparator(idb->GetOptions(cfh).comparator);
ReadOptions read_options;
ReadRangeDelAggregator range_del_agg(&icmp,
kMaxSequenceNumber /* upper_bound */);
Arena arena;
ScopedArenaIterator iter(idb->NewInternalIterator(
read_options, &arena, &range_del_agg, kMaxSequenceNumber, cfh));
if (!begin_key.empty()) {
InternalKey ikey;
ikey.SetMinPossibleForUserKey(begin_key);
iter->Seek(ikey.Encode());
} else {
iter->SeekToFirst();
}
size_t num_keys = 0;
for (; iter->Valid(); iter->Next()) {
ParsedInternalKey ikey;
Status pik_status =
ParseInternalKey(iter->key(), &ikey, true /* log_err_key */); // TODO
if (!pik_status.ok()) {
return pik_status;
}
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 */);
if (++num_keys >= max_num_ikeys) {
break;
}
}
return Status::OK();
}
} // namespace ROCKSDB_NAMESPACE
#endif // ROCKSDB_LITE