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'。
if (engine_args.size() > i)
            flush.rows = applyVisitor(FieldVisitorConvertToNumber<UInt64>(), engine_args[i++]->as<ASTLiteral &>().value);
        if (engine_args.size() > i)
            flush.bytes = applyVisitor(FieldVisitorConvertToNumber<UInt64>(), engine_args[i++]->as<ASTLiteral &>().value);
        
        StorageID destination_id = StorageID::createEmpty();
        if (!destination_table.empty())
        {
            destination_id.database_name = args.getContext()->resolveDatabase(destination_database);
            destination_id.table_name = destination_table;
        }
        return StorageBuffer::create(
            args.table_id,
            args.columns,
            args.constraints,
            args.comment,
            args.getContext(),
            num_buckets,
            min,
            max,
            flush,
            destination_id,
            static_cast<bool>(args.getLocalContext()->getSettingsRef().insert_allow_materialized_columns));
    },
    {
        .supports_parallel_insert = true,
    });
}
}