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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).
#include "rocksdb/utilities/debug.h"
#include "db/db_impl/db_impl.h"
#include "rocksdb/utilities/options_type.h"
namespace ROCKSDB_NAMESPACE {
static std::unordered_map<std::string, ValueType> value_type_string_map = {
{"TypeDeletion", ValueType::kTypeDeletion},
{"TypeValue", ValueType::kTypeValue},
{"TypeMerge", ValueType::kTypeMerge},
{"TypeLogData", ValueType::kTypeLogData},
{"TypeColumnFamilyDeletion", ValueType::kTypeColumnFamilyDeletion},
{"TypeColumnFamilyValue", ValueType::kTypeColumnFamilyValue},
{"TypeColumnFamilyMerge", ValueType::kTypeColumnFamilyMerge},
{"TypeSingleDeletion", ValueType::kTypeSingleDeletion},
{"TypeColumnFamilySingleDeletion",
ValueType::kTypeColumnFamilySingleDeletion},
{"TypeBeginPrepareXID", ValueType::kTypeBeginPrepareXID},
{"TypeEndPrepareXID", ValueType::kTypeEndPrepareXID},
{"TypeCommitXID", ValueType::kTypeCommitXID},
{"TypeRollbackXID", ValueType::kTypeRollbackXID},
{"TypeNoop", ValueType::kTypeNoop},
{"TypeColumnFamilyRangeDeletion",
ValueType::kTypeColumnFamilyRangeDeletion},
{"TypeRangeDeletion", ValueType::kTypeRangeDeletion},
{"TypeColumnFamilyBlobIndex", ValueType::kTypeColumnFamilyBlobIndex},
{"TypeBlobIndex", ValueType::kTypeBlobIndex},
{"TypeBeginPersistedPrepareXID", ValueType::kTypeBeginPersistedPrepareXID},
{"TypeBeginUnprepareXID", ValueType::kTypeBeginUnprepareXID},
{"TypeDeletionWithTimestamp", ValueType::kTypeDeletionWithTimestamp},
{"TypeCommitXIDAndTimestamp", ValueType::kTypeCommitXIDAndTimestamp},
{"TypeWideColumnEntity", ValueType::kTypeWideColumnEntity},
{"TypeColumnFamilyWideColumnEntity",
ValueType::kTypeColumnFamilyWideColumnEntity},
{"TypeValuePreferredSeqno", ValueType::kTypeValuePreferredSeqno},
{"TypeColumnFamilyValuePreferredSeqno",
ValueType::kTypeColumnFamilyValuePreferredSeqno},
};
std::string KeyVersion::GetTypeName() const {
std::string type_name;
if (SerializeEnum<ValueType>(value_type_string_map,
static_cast<ValueType>(type), &type_name)) {
return type_name;
} else {
return "Invalid";
}
}
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;
Arena arena;
ScopedArenaPtr<InternalIterator> iter(
idb->NewInternalIterator(read_options, &arena, kMaxSequenceNumber, cfh));
const Comparator* ucmp = icmp.user_comparator();
size_t ts_sz = ucmp->timestamp_size();
Slice from_slice = begin_key;
bool has_begin = !begin_key.empty();
Slice end_slice = end_key;
bool has_end = !end_key.empty();
std::string begin_key_buf, end_key_buf;
auto [from, end] = MaybeAddTimestampsToRange(
has_begin ? &from_slice : nullptr, has_end ? &end_slice : nullptr, ts_sz,
&begin_key_buf, &end_key_buf);
if (has_begin) {
assert(from.has_value());
InternalKey ikey;
ikey.SetMinPossibleForUserKey(from.value());
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 (has_end && end.has_value() &&
icmp.user_comparator()->Compare(ikey.user_key, end.value()) > 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
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