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'。
query_plan, column_names, destination_metadata_snapshot, query_info,
                local_context, processed_stage, max_block_size, num_streams);
        }
        else
        {
            
            const Block header = metadata_snapshot->getSampleBlock();
            Names columns_intersection = column_names;
            Block header_after_adding_defaults = header;
            const auto & dest_columns = destination_metadata_snapshot->getColumns();
            const auto & our_columns = metadata_snapshot->getColumns();
            for (const String & column_name : column_names)
            {
                if (!dest_columns.hasPhysical(column_name))
                {
                    LOG_WARNING(log, "Destination table {} doesn't have column {}. The default values are used.", destination_id.getNameForLogs(), backQuoteIfNeed(column_name));
                    boost::range::remove_erase(columns_intersection, column_name);
                    continue;
                }
                const auto & dst_col = dest_columns.getPhysical(column_name);
                const auto & col = our_columns.getPhysical(column_name);
                if (!dst_col.type->equals(*col.type))
                {
                    LOG_WARNING(log, "Destination table {} has different type of column {} ({} != {}). Data from destination table are converted.", destination_id.getNameForLogs(), backQuoteIfNeed(column_name), dst_col.type->getName(), col.type->getName());
                    header_after_adding_defaults.getByName(column_name) = ColumnWithTypeAndName(dst_col.type, column_name);
                }
            }
            if (columns_intersection.empty())
            {
                LOG_WARNING(log, "Destination table {} has no common columns with block in buffer. Block of data is skipped.", destination_id.getNameForLogs());