diff options
Diffstat (limited to 'src/mongo/db/pipeline/accumulator_integral.cpp')
-rw-r--r-- | src/mongo/db/pipeline/accumulator_integral.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/accumulator_integral.cpp b/src/mongo/db/pipeline/accumulator_integral.cpp new file mode 100644 index 00000000000..83ba68c40d1 --- /dev/null +++ b/src/mongo/db/pipeline/accumulator_integral.cpp @@ -0,0 +1,75 @@ +/** + * Copyright (C) 2021-present MongoDB, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the Server Side Public License, version 1, + * as published by MongoDB, Inc. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * Server Side Public License for more details. + * + * You should have received a copy of the Server Side Public License + * along with this program. If not, see + * <http://www.mongodb.com/licensing/server-side-public-license>. + * + * As a special exception, the copyright holders give permission to link the + * code of portions of this program with the OpenSSL library under certain + * conditions as described in each individual source file and distribute + * linked combinations including the program with the OpenSSL library. You + * must comply with the Server Side Public License in all respects for + * all of the code used other than as permitted herein. If you modify file(s) + * with this exception, you may extend this exception to your version of the + * file(s), but you are not obligated to do so. If you do not wish to do so, + * delete this exception statement from your version. If you delete this + * exception statement from all source files in the program, then also delete + * it in the license file. + */ + +#include "mongo/platform/basic.h" + +#include "mongo/db/pipeline/accumulator_for_window_functions.h" + +#include "mongo/db/exec/document_value/value.h" +#include "mongo/db/pipeline/accumulation_statement.h" +#include "mongo/db/pipeline/expression.h" +#include "mongo/db/pipeline/window_function/window_function_expression.h" + +namespace mongo { + +REGISTER_WINDOW_FUNCTION(integral, mongo::window_function::ExpressionIntegral::parse); + +AccumulatorIntegral::AccumulatorIntegral(ExpressionContext* const expCtx, + boost::optional<long long> outputUnitMillis) + : AccumulatorForWindowFunctions(expCtx), + _integralWF(expCtx, outputUnitMillis, true /* isNonremovable */) { + _memUsageBytes = sizeof(*this); +} + +void AccumulatorIntegral::processInternal(const Value& input, bool merging) { + tassert(5558800, "$integral can't be merged", !merging); + + _integralWF.add(input); + _memUsageBytes = sizeof(*this) + _integralWF.getApproximateSize() - sizeof(_integralWF); +} + +Value AccumulatorIntegral::getValue(bool toBeMerged) { + return _integralWF.getValue(); +} + +void AccumulatorIntegral::reset() { + _integralWF.reset(); + _memUsageBytes = sizeof(*this); +} + +boost::intrusive_ptr<AccumulatorState> AccumulatorIntegral::create( + ExpressionContext* const expCtx, boost::optional<long long> outputUnitMillis) { + return new AccumulatorIntegral(expCtx, outputUnitMillis); +} + +const char* AccumulatorIntegral::getOpName() const { + return "$integral"; +} + +} // namespace mongo |