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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_COLUMN_OVERLAY_H_
#define SRC_TRACE_PROCESSOR_DB_COLUMN_OVERLAY_H_
#include <variant>
#include "perfetto/ext/base/status_or.h"
#include "src/trace_processor/db/column.h"
#include "src/trace_processor/db/storage.h"
namespace perfetto {
namespace trace_processor {
namespace column {
// Column overlay introduce separation between column storage (vector of data)
// and state (nullability, sorting) and actions (filtering, expanding, joining)
// done on the storage. This is a composable design - one ColumnOverlay
// subclass might hold another subclass, and each of them implements all of the
// functions in it's own specific way.
class ColumnOverlay {
public:
virtual ~ColumnOverlay();
// Clears the rows of RowMap, on which data don't match the FilterOp operation
// with SqlValue. Efficient.
virtual void Filter(FilterOp, SqlValue, RowMap&) const = 0;
// Sorts (ascending) provided vector of indices based on storage.
virtual void StableSort(uint32_t* rows, uint32_t rows_size) const = 0;
};
} // namespace column
} // namespace trace_processor
} // namespace perfetto
#endif // SRC_TRACE_PROCESSOR_DB_COLUMN_OVERLAY_H_
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