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/**
* Copyright (C) 2018-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/exec/sbe/sbe_plan_stage_test.h"
#include "mongo/db/exec/sbe/stages/unique.h"
#include "mongo/db/query/sbe_stage_builder_helpers.h"
namespace mongo::sbe {
/**
* This file contains tests for sbe::UniqueStage.
*/
using UniqueStageTest = PlanStageTestFixture;
TEST_F(UniqueStageTest, DeduplicatesAndPreservesOrderSimple) {
auto [inputTag, inputVal] = stage_builder::makeValue(BSON_ARRAY(1 << 2 << 3 << 1));
value::ValueGuard inputGuard{inputTag, inputVal};
auto [expectedTag, expectedVal] = stage_builder::makeValue(BSON_ARRAY(1 << 2 << 3));
value::ValueGuard expectedGuard{expectedTag, expectedVal};
auto makeStageFn = [](value::SlotId scanSlot, std::unique_ptr<PlanStage> scanStage) {
auto unique =
makeS<UniqueStage>(std::move(scanStage), sbe::makeSV(scanSlot), kEmptyPlanNodeId);
return std::make_pair(scanSlot, std::move(unique));
};
inputGuard.reset();
expectedGuard.reset();
runTest(inputTag, inputVal, expectedTag, expectedVal, makeStageFn);
}
TEST_F(UniqueStageTest, DeduplicatesMultipleSlotsInKey) {
auto [tag, val] = stage_builder::makeValue(BSON_ARRAY(
BSON_ARRAY(1 << 1) << BSON_ARRAY(2 << 2) << BSON_ARRAY(1 << 1) << BSON_ARRAY(3 << 3)));
auto [scanSlots, scan] = generateVirtualScanMulti(2, // numSlots
tag,
val);
auto [expectedTag, expectedVal] = stage_builder::makeValue(
BSON_ARRAY(BSON_ARRAY(1 << 1) << BSON_ARRAY(2 << 2) << BSON_ARRAY(3 << 3)));
value::ValueGuard expectedGuard{expectedTag, expectedVal};
auto unique = makeS<UniqueStage>(std::move(scan), scanSlots, kEmptyPlanNodeId);
auto ctx = makeCompileCtx();
auto resultAccessors = prepareTree(ctx.get(), unique.get(), scanSlots);
auto [resultsTag, resultsVal] = getAllResultsMulti(unique.get(), resultAccessors);
value::ValueGuard resultGuard{resultsTag, resultsVal};
ASSERT_TRUE(valueEquals(resultsTag, resultsVal, expectedTag, expectedVal));
}
TEST_F(UniqueStageTest, ResetsStateAfterClose) {
auto [tag, val] = stage_builder::makeValue(BSON_ARRAY(
BSON_ARRAY(1 << 1) << BSON_ARRAY(2 << 2) << BSON_ARRAY(1 << 1) << BSON_ARRAY(3 << 3)));
auto [scanSlot, scanStage] = generateVirtualScan(tag, val);
auto [expectedTag, expectedVal] = stage_builder::makeValue(
BSON_ARRAY(BSON_ARRAY(1 << 1) << BSON_ARRAY(2 << 2) << BSON_ARRAY(3 << 3)));
value::ValueGuard expectedGuard{expectedTag, expectedVal};
auto unique = makeS<UniqueStage>(std::move(scanStage), sbe::makeSV(scanSlot), kEmptyPlanNodeId);
auto ctx = makeCompileCtx();
auto resultAccessor = prepareTree(ctx.get(), unique.get(), scanSlot);
auto [resultsTag, resultsVal] = getAllResults(unique.get(), resultAccessor);
value::ValueGuard resultGuard{resultsTag, resultsVal};
ASSERT_TRUE(valueEquals(resultsTag, resultsVal, expectedTag, expectedVal));
// Closing and opening the plan should have the effect of clearing the values that 'unique'
// has seen.
unique->close();
unique->open(false);
auto [resetResultsTag, resetResultsVal] = getAllResults(unique.get(), resultAccessor);
value::ValueGuard resetResultGuard{resetResultsTag, resetResultsVal};
// The same result is seen again after closing and re-opening the plan tree.
ASSERT_TRUE(valueEquals(resetResultsTag, resetResultsVal, expectedTag, expectedVal));
}
} // namespace mongo::sbe
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