Update Calibration -> Addition of row in Item Details

i = 0;
for each  rec in input.Item_Details1
{
	i = i + 1;
	rec.S_No=i;
}
itmname = "";
des = "";
for each  sub in input.Item_Details1
{
	if(sub.S_No == 1)
	{
		itmname = sub.Item_Name;
		des = sub.Description;
	}
}
if(itmname != null)
{
	for each  sub1 in input.Item_Details1
	{
		if(sub1.S_No > 1)
		{
			sub1.Item_Name=itmname;
			sub1.Description=des;
		}
	}
}
// itm = List();
// for each  var in input.Item_Details1
// {
// 	fetcal = Calibration_Master[Item_Name == var.Item_Name.Item_Name].ID.getAll();
// 	itm.add(fetcal);
// 	itm = itm.distinct();
// 	var.Item_Name:ui.add(itm);
// }