db.aggregate([{$documents: [{_id: 1}, {_id: 2}]}]);

    // If the routing table is valid, we obtain a reference to it. If the table is not valid, then
    // either the database does not exist, or there are no shards in the cluster. In the latter
    // case, we always return an empty cursor. In the former case, if the requested aggregation is a
    // $changeStream, we allow the operation to continue so that stream cursors can be established
    // on the given namespace before the database or collection is actually created. If the database
    // does not exist and this is not a $changeStream, then we return an empty cursor.
    boost::optional<ChunkManager> cm;
    auto executionNsRoutingInfoStatus =
        sharded_agg_helpers::getExecutionNsRoutingInfo(opCtx, namespaces.executionNss);

    if (!executionNsRoutingInfoStatus.isOK()) {
        if (liteParsedPipeline.startsWithCollStats()) {
            uassertStatusOKWithContext(executionNsRoutingInfoStatus,
                                       "Unable to retrieve information for $collStats stage");
        }
    }

    if (executionNsRoutingInfoStatus.isOK()) {
        cm = std::move(executionNsRoutingInfoStatus.getValue());
    } else if (!(hasChangeStream &&
                 executionNsRoutingInfoStatus == ErrorCodes::NamespaceNotFound)) {
        appendEmptyResultSetWithStatus(
            opCtx, namespaces.requestedNss, executionNsRoutingInfoStatus.getStatus(), result);
        return Status::OK();
    }