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'。
{
    size_t num_local_shards = cluster->getLocalShardCount();
    size_t num_remote_shards = cluster->getRemoteShardCount();
    return (num_remote_shards * settings.max_parallel_replicas) + num_local_shards;
}
}
StorageDistributed::~StorageDistributed() = default;
NamesAndTypesList StorageDistributed::getVirtuals() const
{
    
    
    return NamesAndTypesList{
            NameAndTypePair("_table", std::make_shared<DataTypeString>()),
            NameAndTypePair("_part", std::make_shared<DataTypeString>()),
            NameAndTypePair("_part_index", std::make_shared<DataTypeUInt64>()),
            NameAndTypePair("_part_uuid", std::make_shared<DataTypeUUID>()),
            NameAndTypePair("_partition_id", std::make_shared<DataTypeString>()),
            NameAndTypePair("_sample_factor", std::make_shared<DataTypeFloat64>()),
            NameAndTypePair("_shard_num", std::make_shared<DataTypeUInt32>()),
    };
}
StorageDistributed::StorageDistributed(