Simply display zero if it's less or equals to 0.
void ClientBase::resetOutput()
{
    output_format.reset(
    logs_out_stream.reset(
    if (pager_cmd)
    {
        pager_cmd->in.close(
        pager_cmd->wait(
    }
    pager_cmd = nullptr;
    if (out_file_buf)
    {
        out_file_buf->next(
        out_file_buf.reset(
    }
    if (out_logs_buf)
    {
        out_logs_buf->next(
        out_logs_buf.reset(
    }
    std_out.next(
}
/// Receive the block that serves as an example of the structure of table where data will be inserted.
bool ClientBase::receiveSampleBlock(Block & out, ColumnsDescription & columns_description, ASTPtr parsed_query)
{
    while (true)
    {
        Packet packet = connection->receivePacket(
        switch (packet.type)
        {