Change the table comment after created the table is not supported now?
Like mysql : ALTER TABLE [tableName] COMMNET [comment]; 
The sql "ALTER TABLE `system`.tables UPDATE Comment='test' WHERE NAME='t1';" also not supported!!!
My version is '21.9.4.35'。
node_data = create_node_data();
        }
        return *node_data.directory_monitor;
    }
}
std::vector<StorageDistributedDirectoryMonitor::Status> StorageDistributed::getDirectoryMonitorsStatuses() const
{
    std::vector<StorageDistributedDirectoryMonitor::Status> statuses;
    std::lock_guard lock(cluster_nodes_mutex);
    statuses.reserve(cluster_nodes_data.size());
    for (const auto & node : cluster_nodes_data)
        statuses.push_back(node.second.directory_monitor->getStatus());
    return statuses;
}
std::optional<UInt64> StorageDistributed::totalBytes(const Settings &) const
{
    UInt64 total_bytes = 0;
    for (const auto & status : getDirectoryMonitorsStatuses())
        total_bytes += status.bytes_count;
    return total_bytes;
}
size_t StorageDistributed::getShardCount() const
{
    return getCluster()->getShardCount();
}
ClusterPtr StorageDistributed::getCluster() const
{
    return owned_cluster ? owned_cluster : getContext()->getCluster(cluster_name);
}
ClusterPtr StorageDistributed::getOptimizedCluster(