本文整理汇总了C++中WorkingSet::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ WorkingSet::clear方法的具体用法？C++ WorkingSet::clear怎么用？C++ WorkingSet::clear使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类WorkingSet的用法示例。
在下文中一共展示了WorkingSet::clear方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: run
void run() {
OldClientWriteContext ctx(&_txn, nss.ns());
addIndex(BSON("a" << 1 << "b" << 1));
addIndex(BSON("a" << 1 << "c" << 1));
addIndex(BSON("d" << 1));
for (int i = 0; i < 10; i++) {
insert(BSON("a" << 1 << "e" << 1 << "d" << 1));
}
// Running this query should not create any cache entries. For the first branch, it's
// because plans using the {a: 1, b: 1} and {a: 1, c: 1} indices should tie during plan
// ranking. For the second branch it's because there is only one relevant index.
BSONObj query = fromjson("{$or: [{a: 1, e: 1}, {d: 1}]}");
Collection* collection = ctx.getCollection();
auto qr = stdx::make_unique<QueryRequest>(nss);
qr->setFilter(query);
auto statusWithCQ = CanonicalQuery::canonicalize(
txn(), std::move(qr), ExtensionsCallbackDisallowExtensions());
ASSERT_OK(statusWithCQ.getStatus());
std::unique_ptr<CanonicalQuery> cq = std::move(statusWithCQ.getValue());
// Get planner params.
QueryPlannerParams plannerParams;
fillOutPlannerParams(&_txn, collection, cq.get(), &plannerParams);
WorkingSet ws;
std::unique_ptr<SubplanStage> subplan(
new SubplanStage(&_txn, collection, &ws, plannerParams, cq.get()));
PlanYieldPolicy yieldPolicy(PlanExecutor::YIELD_MANUAL, _clock);
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
// Nothing is in the cache yet, so neither branch should have been planned from
// the plan cache.
ASSERT_FALSE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
// If we run the query again, it should again be the case that neither branch gets planned
// from the cache (because the first call to pickBestPlan() refrained from creating any
// cache entries).
ws.clear();
subplan.reset(new SubplanStage(&_txn, collection, &ws, plannerParams, cq.get()));
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
ASSERT_FALSE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
}示例2: run
void run() {
OldClientWriteContext ctx(&_txn, nss.ns());
addIndex(BSON("a" << 1 << "b" << 1));
addIndex(BSON("a" << 1));
addIndex(BSON("c" << 1));
for (int i = 0; i < 10; i++) {
insert(BSON("a" << 1 << "b" << i << "c" << i));
}
// Running this query should not create any cache entries. For the first branch, it's
// because there are no matching results. For the second branch it's because there is only
// one relevant index.
BSONObj query = fromjson("{$or: [{a: 1, b: 15}, {c: 1}]}");
Collection* collection = ctx.getCollection();
auto statusWithCQ = CanonicalQuery::canonicalize(nss, query);
ASSERT_OK(statusWithCQ.getStatus());
std::unique_ptr<CanonicalQuery> cq = std::move(statusWithCQ.getValue());
// Get planner params.
QueryPlannerParams plannerParams;
fillOutPlannerParams(&_txn, collection, cq.get(), &plannerParams);
WorkingSet ws;
std::unique_ptr<SubplanStage> subplan(
new SubplanStage(&_txn, collection, &ws, plannerParams, cq.get()));
PlanYieldPolicy yieldPolicy(nullptr, PlanExecutor::YIELD_MANUAL);
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
// Nothing is in the cache yet, so neither branch should have been planned from
// the plan cache.
ASSERT_FALSE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
// If we run the query again, it should again be the case that neither branch gets planned
// from the cache (because the first call to pickBestPlan() refrained from creating any
// cache entries).
ws.clear();
subplan.reset(new SubplanStage(&_txn, collection, &ws, plannerParams, cq.get()));
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
ASSERT_FALSE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
}示例3: run
void run() {
OldClientWriteContext ctx(&_txn, ns());
addIndex(BSON("a" << 1 << "b" << 1));
addIndex(BSON("a" << 1 << "c" << 1));
for (int i = 0; i < 10; i++) {
insert(BSON("a" << 1 << "b" << i << "c" << i));
}
// This query should result in a plan cache entry for the first branch. The second
// branch should tie, meaning that nothing is inserted into the plan cache.
BSONObj query = fromjson("{$or: [{a: 1, b: 3}, {a: 1}]}");
Collection* collection = ctx.getCollection();
CanonicalQuery* rawCq;
ASSERT_OK(CanonicalQuery::canonicalize(ns(), query, &rawCq));
boost::scoped_ptr<CanonicalQuery> cq(rawCq);
// Get planner params.
QueryPlannerParams plannerParams;
fillOutPlannerParams(&_txn, collection, cq.get(), &plannerParams);
WorkingSet ws;
boost::scoped_ptr<SubplanStage> subplan(new SubplanStage(&_txn, collection, &ws,
plannerParams, cq.get()));
PlanYieldPolicy yieldPolicy(NULL, PlanExecutor::YIELD_MANUAL);
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
// Nothing is in the cache yet, so neither branch should have been planned from
// the plan cache.
ASSERT_FALSE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
// If we repeat the same query, then the first branch should come from the cache,
// but the second is re-planned due to tying on the first run.
ws.clear();
subplan.reset(new SubplanStage(&_txn, collection, &ws, plannerParams, cq.get()));
ASSERT_OK(subplan->pickBestPlan(&yieldPolicy));
ASSERT_TRUE(subplan->branchPlannedFromCache(0));
ASSERT_FALSE(subplan->branchPlannedFromCache(1));
}