本文整理汇总了C++中intrusive_ptr::optimizePipeline方法的典型用法代码示例。如果您正苦于以下问题：C++ intrusive_ptr::optimizePipeline方法的具体用法？C++ intrusive_ptr::optimizePipeline怎么用？C++ intrusive_ptr::optimizePipeline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intrusive_ptr的用法示例。
在下文中一共展示了intrusive_ptr::optimizePipeline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:
shared_ptr<PlanExecutor> PipelineD::addCursorSource(const intrusive_ptr<Pipeline>& pipeline,
const intrusive_ptr<ExpressionContext>& expCtx,
shared_ptr<PlanExecutor> exec,
DepsTracker deps,
const BSONObj& queryObj,
const BSONObj& sortObj,
const BSONObj& projectionObj) {
// Get the full "namespace" name.
const string& fullName = expCtx->ns.ns();
// Put the PlanExecutor into a DocumentSourceCursor and add it to the front of the pipeline.
intrusive_ptr<DocumentSourceCursor> pSource =
DocumentSourceCursor::create(fullName, exec, expCtx);
// Note the query, sort, and projection for explain.
pSource->setQuery(queryObj);
pSource->setSort(sortObj);
if (deps.hasNoRequirements()) {
pSource->shouldProduceEmptyDocs();
}
if (!projectionObj.isEmpty()) {
pSource->setProjection(projectionObj, boost::none);
} else {
// There may be fewer dependencies now if the sort was covered.
if (!sortObj.isEmpty()) {
deps = pipeline->getDependencies(queryObj);
}
pSource->setProjection(deps.toProjection(), deps.toParsedDeps());
}
// Add the initial DocumentSourceCursor to the front of the pipeline. Then optimize again in
// case the new stage can be absorbed with the first stages of the pipeline.
pipeline->addInitialSource(pSource);
pipeline->optimizePipeline();
// DocumentSourceCursor expects a yielding PlanExecutor that has had its state saved. We
// deregister the PlanExecutor so that it can be registered with ClientCursor.
exec->deregisterExec();
exec->saveState();
return exec;
}