rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.cc

// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.

#ifndef ROCKSDB_LITE

#include <string>

#include "rocksdb/slice.h"
#include "utilities/compaction_filters/remove_emptyvalue_compactionfilter.h"

namespace rocksdb {

const char* RemoveEmptyValueCompactionFilter::Name() const {
  return "RemoveEmptyValueCompactionFilter";
}

bool RemoveEmptyValueCompactionFilter::Filter(int level,
    const Slice& key,
    const Slice& existing_value,
    std::string* new_value,
    bool* value_changed) const {

  // remove kv pairs that have empty values
  return existing_value.empty();
}

}  // namespace rocksdb
#endif  // !ROCKSDB_LITE