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'。
{
    auto database_table_iterators = getDatabaseIterators(getContext());
    for (auto & iterator : database_table_iterators)
    {
        while (iterator->isValid())
        {
            const auto & table = iterator->table();
            if (table.get() != this && predicate(table))
                return table;
            iterator->next();
        }
    }
    return {};
}
bool StorageMerge::isRemote() const