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'。
QueryPlan & query_plan,
    const Names & column_names,
    const StorageMetadataPtr & metadata_snapshot,
    SelectQueryInfo & query_info,
    ContextPtr local_context,
    QueryProcessingStage::Enum processed_stage,
    const size_t ,
    const unsigned )
{
    const auto & modified_query_ast = rewriteSelectQuery(
        query_info.query, remote_database, remote_table, remote_table_function_ptr);
    Block header =
        InterpreterSelectQuery(query_info.query, local_context, SelectQueryOptions(processed_stage).analyze()).getSampleBlock();
    
    if (query_info.getCluster()->getShardsInfo().empty())
    {
        Pipe pipe(std::make_shared<NullSource>(header));
        auto read_from_pipe = std::make_unique<ReadFromPreparedSource>(std::move(pipe));
        read_from_pipe->setStepDescription("Read from NullSource (Distributed)");
        query_plan.addStep(std::move(read_from_pipe));
        return;
    }
    bool has_virtual_shard_num_column = std::find(column_names.begin(), column_names.end(), "_shard_num") != column_names.end();
    if (has_virtual_shard_num_column && !isVirtualColumn("_shard_num", metadata_snapshot))
        has_virtual_shard_num_column = false;
    StorageID main_table = StorageID::createEmpty();
    if (!remote_table_function_ptr)