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 (!distributed_settings.bytes_to_throw_insert &&
        !distributed_settings.bytes_to_delay_insert)
        return;
    UInt64 total_bytes = *totalBytes(getContext()->getSettingsRef());
    if (distributed_settings.bytes_to_throw_insert && total_bytes > distributed_settings.bytes_to_throw_insert)
    {
        ProfileEvents::increment(ProfileEvents::DistributedRejectedInserts);
        throw Exception(ErrorCodes::DISTRIBUTED_TOO_MANY_PENDING_BYTES,
            "Too many bytes pending for async INSERT: {} (bytes_to_throw_insert={})",
            formatReadableSizeWithBinarySuffix(total_bytes),
            formatReadableSizeWithBinarySuffix(distributed_settings.bytes_to_throw_insert));
    }
    if (distributed_settings.bytes_to_delay_insert && total_bytes > distributed_settings.bytes_to_delay_insert)
    {
        
        
        const size_t step_ms = std::min<double>(1., double(distributed_settings.max_delay_to_insert) * 1'000 * 0.05);
        UInt64 delayed_ms = 0;
        do {
            delayed_ms += step_ms;