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 (flush_thresholds.rows && rows > flush_thresholds.rows)
        {
            ProfileEvents::increment(ProfileEvents::StorageBufferPassedRowsFlushThreshold);
            return true;
        }
        if (flush_thresholds.bytes && bytes > flush_thresholds.bytes)
        {
            ProfileEvents::increment(ProfileEvents::StorageBufferPassedBytesFlushThreshold);
            return true;
        }
    }
    return false;
}
void StorageBuffer::flushAllBuffers(bool check_thresholds, bool reset_blocks_structure)
{
    for (auto & buf : buffers)
        flushBuffer(buf, check_thresholds, false, reset_blocks_structure);
}
void StorageBuffer::flushBuffer(Buffer & buffer, bool check_thresholds, bool locked, bool reset_block_structure)
{
    Block block_to_write;
    time_t current_time = time(nullptr);
    size_t rows = 0;
    size_t bytes = 0;
    time_t time_passed = 0;
    std::optional<std::unique_lock<std::mutex>> lock;
    if (!locked)
        lock.emplace(buffer.lockForReading());
    block_to_write = buffer.data.cloneEmpty();