How to change the data type in the table ESLL for the field USERF2_NUM ?

Hello Friends,

I have a requirement in which one of the change is to convert the data type of the field 'USERF2_NUM' in the table 'ESLL' from 'QUAN' to 'CHAR'.

How do i do it if i have an access to change it..........i think i should also check the impact of the change if done.

Kindly tell me as my requirement starts with this small change.

Regards,

Rajesh Kumar