How to deal with the change of data element?
My trouble's background is:
A CBO table(ZIEBTCIITM) saves invoice items .
There are three fields relevant to quantity in it.
And they have the corresponding data elements with the same type QUAN,13 characters and 3 decimals.
Now because the quantity is so small,for example 0.00004,that the 3 decimal digit is not suitable.
I want to change the CBO table to adapt my business,so the quantity fields' decimal should be expanded firstly,and there are transction data in the CBO table.
My question is :
1) Is it necessary to backup the CBO table before data element change?
2) What should I do is Only to expand the data elements' decimals?
Anyone can give me suggestion?