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'。
{
    try
    {
        flushClusterNodesAllData(getContext());
    }
    catch (...)
    {
        tryLogCurrentException(log, "Cannot flush");
    }
}
void StorageDistributed::flushClusterNodesAllData(ContextPtr local_context)
{
    
    auto table_lock = lockForShare(local_context->getCurrentQueryId(), local_context->getSettingsRef().lock_acquire_timeout);
    std::vector<std::shared_ptr<StorageDistributedDirectoryMonitor>> directory_monitors;
    {
        std::lock_guard lock(cluster_nodes_mutex);
        directory_monitors.reserve(cluster_nodes_data.size());
        for (auto & node : cluster_nodes_data)
            directory_monitors.push_back(node.second.directory_monitor);
    }
    
    for (auto & node : directory_monitors)
        node->flushAllData();
}
void StorageDistributed::rename(const String & new_path_to_table_data, const StorageID & new_table_id)