I can't use the original column. As i have to show original column(say COL1) value to user and the another datacolumn(say DUMMY) is for technical calcuations which will be changed after performing business validations on each input of the user.
I can't put my entire business validation into the expression of the computed column(DUMMY). I also have the requirement where i need to show business validated data(DUMMY column data) in to the original column(COL1) and the user can modify the values and viceversa.
So, is using computed column with expression set is the only option ?