2 files changed, 56 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.cc b/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.cc
new file mode 100644
index 000000000..c97eef41d
--- /dev/null
+++ b/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.cc
@@ -0,0 +1,29 @@
+// 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).
+
+#ifndef ROCKSDB_LITE
+
+#include <string>
+
+#include "rocksdb/slice.h"
+#include "utilities/compaction_filters/remove_emptyvalue_compactionfilter.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+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_NAMESPACE
+#endif  // !ROCKSDB_LITE
diff --git a/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.h b/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.h
new file mode 100644
index 000000000..f5dbec900
--- /dev/null
+++ b/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.h
@@ -0,0 +1,27 @@
+// 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).
+
+#ifndef ROCKSDB_LITE
+
+#pragma once
+
+#include <string>
+
+#include "rocksdb/compaction_filter.h"
+#include "rocksdb/slice.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+class RemoveEmptyValueCompactionFilter : public CompactionFilter {
+ public:
+    const char* Name() const override;
+    bool Filter(int level,
+        const Slice& key,
+        const Slice& existing_value,
+        std::string* new_value,
+        bool* value_changed) const override;
+};
+}  // namespace ROCKSDB_NAMESPACE
+#endif  // !ROCKSDB_LITE