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diff --git a/src/trace_processor/db/storage_overlay.h b/src/trace_processor/db/storage_overlay.h
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+++ b/src/trace_processor/db/storage_overlay.h
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+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_TRACE_PROCESSOR_DB_STORAGE_OVERLAY_H_
+#define SRC_TRACE_PROCESSOR_DB_STORAGE_OVERLAY_H_
+
+#include <variant>
+#include "perfetto/ext/base/status_or.h"
+#include "src/trace_processor/db/column.h"
+#include "src/trace_processor/db/column_overlay.h"
+#include "src/trace_processor/db/storage.h"
+
+namespace perfetto {
+namespace trace_processor {
+namespace column {
+
+// Overlay responsible for doing operations on storage.
+class StorageOverlay : public ColumnOverlay {
+ public:
+  explicit StorageOverlay(const Storage* storage) : storage_(storage) {}
+  void Filter(FilterOp, SqlValue, RowMap&) const override;
+  void StableSort(uint32_t* rows, uint32_t rows_size) const override;
+
+ private:
+  const Storage* storage_;
+};
+}  // namespace column
+}  // namespace trace_processor
+}  // namespace perfetto
+
+#endif  // SRC_TRACE_PROCESSOR_DB_STORAGE_OVERLAY_H_