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'。
{
    time_t min_first_write_time = std::numeric_limits<time_t>::max();
    time_t rows = 0;
    for (auto & buffer : buffers)
    {
        
        
        
        
        
        
        
        
        
        std::unique_lock lock(buffer.tryLock());
        if (lock.owns_lock())
        {
            min_first_write_time = buffer.first_write_time;
            rows += buffer.data.rows();
        }
    }
    
    if (!rows)
        return;
    time_t current_time = time(nullptr);