// static
long long DeleteStage::getNumDeleted(const PlanExecutor& exec) {
invariant(exec.getRootStage()->isEOF());
invariant(exec.getRootStage()->stageType() == STAGE_DELETE);
DeleteStage* deleteStage = static_cast<DeleteStage*>(exec.getRootStage());
const DeleteStats* deleteStats =
static_cast<const DeleteStats*>(deleteStage->getSpecificStats());
return deleteStats->docsDeleted;
}
long long DeleteExecutor::execute(Database* db) {
uassertStatusOK(prepare());
// If we've already done the in-lock preparation, this is a no-op.
uassertStatusOK(prepareInLock(db));
invariant(_exec.get());
uassertStatusOK(_exec->executePlan());
// Extract the number of documents deleted from the DeleteStage stats.
invariant(_exec->getRootStage()->stageType() == STAGE_DELETE);
DeleteStage* deleteStage = static_cast<DeleteStage*>(_exec->getRootStage());
const DeleteStats* deleteStats =
static_cast<const DeleteStats*>(deleteStage->getSpecificStats());
return deleteStats->docsDeleted;
}
long long DeleteExecutor::execute(Database* db) {
uassertStatusOK(prepare());
uassert(17417,
mongoutils::str::stream() <<
"DeleteExecutor::prepare() failed to parse query " << _request->getQuery(),
_isQueryParsed);
const NamespaceString& ns(_request->getNamespaceString());
if (!_request->isGod()) {
if (ns.isSystem()) {
uassert(12050,
"cannot delete from system namespace",
legalClientSystemNS(ns.ns(), true));
}
if (ns.ns().find('$') != string::npos) {
log() << "cannot delete from collection with reserved $ in name: " << ns << endl;
uasserted(10100, "cannot delete from collection with reserved $ in name");
}
}
Collection* collection = db->getCollection(_request->getOpCtx(), ns.ns());
if (NULL == collection) {
return 0;
}
uassert(10101,
str::stream() << "cannot remove from a capped collection: " << ns.ns(),
!collection->isCapped());
uassert(ErrorCodes::NotMaster,
str::stream() << "Not primary while removing from " << ns.ns(),
!_request->shouldCallLogOp() ||
repl::getGlobalReplicationCoordinator()->canAcceptWritesForDatabase(ns.db()));
PlanExecutor* rawExec;
if (_canonicalQuery.get()) {
// This is the non-idhack branch.
uassertStatusOK(getExecutorDelete(_request->getOpCtx(), collection,
_canonicalQuery.release(), _request->isMulti(),
_request->shouldCallLogOp(), &rawExec));
}
else {
// This is the idhack branch.
uassertStatusOK(getExecutorDelete(_request->getOpCtx(), collection, ns.ns(),
_request->getQuery(), _request->isMulti(),
_request->shouldCallLogOp(), &rawExec));
}
scoped_ptr<PlanExecutor> exec(rawExec);
// Concurrently mutating state (by us) so we need to register 'exec'.
const ScopedExecutorRegistration safety(exec.get());
uassertStatusOK(exec->executePlan());
// Extract the number of documents deleted from the DeleteStage stats.
invariant(exec->getRootStage()->stageType() == STAGE_DELETE);
DeleteStage* deleteStage = static_cast<DeleteStage*>(exec->getRootStage());
const DeleteStats* deleteStats =
static_cast<const DeleteStats*>(deleteStage->getSpecificStats());
return deleteStats->docsDeleted;
}