本文整理汇总了C++中PlanCache::contains方法的典型用法代码示例。如果您正苦于以下问题：C++ PlanCache::contains方法的具体用法？C++ PlanCache::contains怎么用？C++ PlanCache::contains使用的例子？那么, 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PlanCache的用法示例。
在下文中一共展示了PlanCache::contains方法的1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: list
// static
Status PlanCacheListPlans::list(OperationContext* txn,
const PlanCache& planCache,
const std::string& ns,
const BSONObj& cmdObj,
BSONObjBuilder* bob) {
CanonicalQuery* cqRaw;
Status status = canonicalize(txn, ns, cmdObj, &cqRaw);
if (!status.isOK()) {
return status;
}
scoped_ptr<CanonicalQuery> cq(cqRaw);
if (!planCache.contains(*cq)) {
// Return empty plans in results if query shape does not
// exist in plan cache.
BSONArrayBuilder plansBuilder(bob->subarrayStart("plans"));
plansBuilder.doneFast();
return Status::OK();
}
PlanCacheEntry* entryRaw;
Status result = planCache.getEntry(*cq, &entryRaw);
if (!result.isOK()) {
return result;
}
scoped_ptr<PlanCacheEntry> entry(entryRaw);
BSONArrayBuilder plansBuilder(bob->subarrayStart("plans"));
size_t numPlans = entry->plannerData.size();
invariant(numPlans == entry->decision->stats.size());
invariant(numPlans == entry->decision->scores.size());
for (size_t i = 0; i < numPlans; ++i) {
BSONObjBuilder planBob(plansBuilder.subobjStart());
// Create plan details field.
// Currently, simple string representationg of
// SolutionCacheData. Need to revisit format when we
// need to parse user-provided plan details for planCacheAddPlan.
SolutionCacheData* scd = entry->plannerData[i];
BSONObjBuilder detailsBob(planBob.subobjStart("details"));
detailsBob.append("solution", scd->toString());
detailsBob.doneFast();
// reason is comprised of score and initial stats provided by
// multi plan runner.
BSONObjBuilder reasonBob(planBob.subobjStart("reason"));
reasonBob.append("score", entry->decision->scores[i]);
BSONObjBuilder statsBob(reasonBob.subobjStart("stats"));
PlanStageStats* stats = entry->decision->stats.vector()[i];
if (stats) {
Explain::statsToBSON(*stats, &statsBob);
}
statsBob.doneFast();
reasonBob.doneFast();
// BSON object for 'feedback' field is created from query executions
// and shows number of executions since this cached solution was
// created as well as score data (average and standard deviation).
BSONObjBuilder feedbackBob(planBob.subobjStart("feedback"));
if (i == 0U) {
feedbackBob.append("nfeedback", int(entry->feedback.size()));
feedbackBob.append("averageScore", entry->averageScore.get_value_or(0));
feedbackBob.append("stdDevScore",entry->stddevScore.get_value_or(0));
BSONArrayBuilder scoresBob(feedbackBob.subarrayStart("scores"));
for (size_t i = 0; i < entry->feedback.size(); ++i) {
BSONObjBuilder scoreBob(scoresBob.subobjStart());
scoreBob.append("score", entry->feedback[i]->score);
}
scoresBob.doneFast();
}
feedbackBob.doneFast();
planBob.append("filterSet", scd->indexFilterApplied);
}
plansBuilder.doneFast();
return Status::OK();
}