// static
StatusWith<std::unique_ptr<CanonicalQuery>> CanonicalQuery::canonicalize(
OperationContext* opCtx,
const CanonicalQuery& baseQuery,
MatchExpression* root,
const ExtensionsCallback& extensionsCallback) {
// TODO: we should be passing the filter corresponding to 'root' to the QR rather than the base
// query's filter, baseQuery.getQueryRequest().getFilter().
auto qr = stdx::make_unique<QueryRequest>(baseQuery.nss());
qr->setFilter(baseQuery.getQueryRequest().getFilter());
qr->setProj(baseQuery.getQueryRequest().getProj());
qr->setSort(baseQuery.getQueryRequest().getSort());
qr->setCollation(baseQuery.getQueryRequest().getCollation());
qr->setExplain(baseQuery.getQueryRequest().isExplain());
auto qrStatus = qr->validate();
if (!qrStatus.isOK()) {
return qrStatus;
}
std::unique_ptr<CollatorInterface> collator;
if (baseQuery.getCollator()) {
collator = baseQuery.getCollator()->clone();
}
// Make the CQ we'll hopefully return.
std::unique_ptr<CanonicalQuery> cq(new CanonicalQuery());
Status initStatus = cq->init(
std::move(qr), extensionsCallback, root->shallowClone().release(), std::move(collator));
if (!initStatus.isOK()) {
return initStatus;
}
return std::move(cq);
}
// static
StatusWith<std::unique_ptr<CanonicalQuery>> CanonicalQuery::canonicalize(
OperationContext* opCtx, const CanonicalQuery& baseQuery, MatchExpression* root) {
auto qr = stdx::make_unique<QueryRequest>(baseQuery.nss());
BSONObjBuilder builder;
root->serialize(&builder);
qr->setFilter(builder.obj());
qr->setProj(baseQuery.getQueryRequest().getProj());
qr->setSort(baseQuery.getQueryRequest().getSort());
qr->setCollation(baseQuery.getQueryRequest().getCollation());
qr->setExplain(baseQuery.getQueryRequest().isExplain());
auto qrStatus = qr->validate();
if (!qrStatus.isOK()) {
return qrStatus;
}
std::unique_ptr<CollatorInterface> collator;
if (baseQuery.getCollator()) {
collator = baseQuery.getCollator()->clone();
}
// Make the CQ we'll hopefully return.
std::unique_ptr<CanonicalQuery> cq(new CanonicalQuery());
Status initStatus = cq->init(opCtx,
std::move(qr),
baseQuery.canHaveNoopMatchNodes(),
root->shallowClone(),
std::move(collator));
if (!initStatus.isOK()) {
return initStatus;
}
return std::move(cq);
}
StatusWith<ParsedDistinct> ParsedDistinct::parse(OperationContext* opCtx,
const NamespaceString& nss,
const BSONObj& cmdObj,
const ExtensionsCallback& extensionsCallback,
bool isExplain,
const CollatorInterface* defaultCollator) {
IDLParserErrorContext ctx("distinct");
DistinctCommand parsedDistinct(nss);
try {
parsedDistinct = DistinctCommand::parse(ctx, cmdObj);
} catch (...) {
return exceptionToStatus();
}
auto qr = stdx::make_unique<QueryRequest>(nss);
if (parsedDistinct.getKey().find('\0') != std::string::npos) {
return Status(ErrorCodes::Error(31032), "Key field cannot contain an embedded null byte");
}
// Create a projection on the fields needed by the distinct command, so that the query planner
// will produce a covered plan if possible.
qr->setProj(getDistinctProjection(std::string(parsedDistinct.getKey())));
if (auto query = parsedDistinct.getQuery()) {
qr->setFilter(query.get());
}
if (auto collation = parsedDistinct.getCollation()) {
qr->setCollation(collation.get());
}
if (auto comment = parsedDistinct.getComment()) {
qr->setComment(comment.get().toString());
}
// The IDL parser above does not handle generic command arguments. Since the underlying query
// request requires the following options, manually parse and verify them here.
if (auto readConcernElt = cmdObj[repl::ReadConcernArgs::kReadConcernFieldName]) {
if (readConcernElt.type() != BSONType::Object) {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "\"" << repl::ReadConcernArgs::kReadConcernFieldName
<< "\" had the wrong type. Expected "
<< typeName(BSONType::Object)
<< ", found "
<< typeName(readConcernElt.type()));
}
qr->setReadConcern(readConcernElt.embeddedObject());
}
if (auto queryOptionsElt = cmdObj[QueryRequest::kUnwrappedReadPrefField]) {
if (queryOptionsElt.type() != BSONType::Object) {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "\"" << QueryRequest::kUnwrappedReadPrefField
<< "\" had the wrong type. Expected "
<< typeName(BSONType::Object)
<< ", found "
<< typeName(queryOptionsElt.type()));
}
qr->setUnwrappedReadPref(queryOptionsElt.embeddedObject());
}
if (auto maxTimeMSElt = cmdObj[QueryRequest::cmdOptionMaxTimeMS]) {
auto maxTimeMS = QueryRequest::parseMaxTimeMS(maxTimeMSElt);
if (!maxTimeMS.isOK()) {
return maxTimeMS.getStatus();
}
qr->setMaxTimeMS(static_cast<unsigned int>(maxTimeMS.getValue()));
}
qr->setExplain(isExplain);
const boost::intrusive_ptr<ExpressionContext> expCtx;
auto cq = CanonicalQuery::canonicalize(opCtx,
std::move(qr),
expCtx,
extensionsCallback,
MatchExpressionParser::kAllowAllSpecialFeatures);
if (!cq.isOK()) {
return cq.getStatus();
}
if (cq.getValue()->getQueryRequest().getCollation().isEmpty() && defaultCollator) {
cq.getValue()->setCollator(defaultCollator->clone());
}
return ParsedDistinct(std::move(cq.getValue()), parsedDistinct.getKey().toString());
}