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 both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 #ifndef ROCKSDB_LITE
   7
   8 #include "utilities/compaction_filters/remove_emptyvalue_compactionfilter.h"
   9
  10 #include <string>
  11
  12 #include "rocksdb/slice.h"
  13
  14 namespace ROCKSDB_NAMESPACE {
  15
  16 bool RemoveEmptyValueCompactionFilter::Filter(int /*level*/,
  17                                               const Slice& /*key*/,
  18                                               const Slice& existing_value,
  19                                               std::string* /*new_value*/,
  20                                               bool* /*value_changed*/) const {
  21   // remove kv pairs that have empty values
  22   return existing_value.empty();
  23 }
  24
  25 }  // namespace ROCKSDB_NAMESPACE
  26 #endif  // !ROCKSDB_LITE