ceph/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.cc

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 // This source code is licensed under the BSD-style license found in the
   3 // LICENSE file in the root directory of this source tree. An additional grant
   4 // of patent rights can be found in the PATENTS file in the same directory.
   5
   6 #ifndef ROCKSDB_LITE
   7
   8 #include <string>
   9
  10 #include "rocksdb/slice.h"
  11 #include "utilities/compaction_filters/remove_emptyvalue_compactionfilter.h"
  12
  13 namespace rocksdb {
  14
  15 const char* RemoveEmptyValueCompactionFilter::Name() const {
  16   return "RemoveEmptyValueCompactionFilter";
  17 }
  18
  19 bool RemoveEmptyValueCompactionFilter::Filter(int level,
  20     const Slice& key,
  21     const Slice& existing_value,
  22     std::string* new_value,
  23     bool* value_changed) const {
  24
  25   // remove kv pairs that have empty values
  26   return existing_value.empty();
  27 }
  28
  29 }  // namespace rocksdb
  30 #endif  // !ROCKSDB_LITE