# The values are _copied_ here 
$csr->bind_param(":serial_number", $Sno); 
$csr->bind_param(":app_name", $appname); 
$csr->bind_param(":max_time", $max); 
$csr->bind_param(":max_size", $maxs); 
$csr->bind_param_inout(":warranty_tbl", \$warra, -10); 
$csr->bind_param_inout(":return_status", \$return, 100);