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.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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// This source code is also licensed under the GPLv2 license found in the
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// COPYING file in the root directory of this source tree.
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#ifndef ROCKSDB_LITE
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#include "rocksdb/utilities/debug.h"
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#include "db/db_impl.h"
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namespace rocksdb {
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Status GetAllKeyVersions(DB* db, Slice begin_key, Slice end_key,
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std::vector<KeyVersion>* key_versions) {
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assert(key_versions != nullptr);
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key_versions->clear();
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DBImpl* idb = static_cast<DBImpl*>(db->GetRootDB());
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auto icmp = InternalKeyComparator(idb->GetOptions().comparator);
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RangeDelAggregator range_del_agg(icmp, {} /* snapshots */);
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Arena arena;
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ScopedArenaIterator iter(idb->NewInternalIterator(&arena, &range_del_agg));
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if (!begin_key.empty()) {
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InternalKey ikey;
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ikey.SetMaxPossibleForUserKey(begin_key);
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iter->Seek(ikey.Encode());
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} else {
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iter->SeekToFirst();
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}
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for (; iter->Valid(); iter->Next()) {
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ParsedInternalKey ikey;
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if (!ParseInternalKey(iter->key(), &ikey)) {
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return Status::Corruption("Internal Key [" + iter->key().ToString() +
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"] parse error!");
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}
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if (!end_key.empty() &&
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icmp.user_comparator()->Compare(ikey.user_key, end_key) > 0) {
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break;
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}
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key_versions->emplace_back(ikey.user_key.ToString() /* _user_key */,
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iter->value().ToString() /* _value */,
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ikey.sequence /* _sequence */,
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static_cast<int>(ikey.type) /* _type */);
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}
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return Status::OK();
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}
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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