How to insert a code for a function module into a Customer Exit Variable?
I have two Key Figures viz., Net Prchs Rtl, and Net Prchs Unt. Both these Key figures have This Week (TW) and Last Week (LW). There is a variable for This week but there is no variable defined for Last week.
I need to get data in the column LW (Last Week) for both the key figures.
In function module EXIT_SAPLRRS0_001 one of the functions I have is:
Get the previous Fiscal Week
CALL FUNCTION 'DATE_TO_PERIOD_CONVERT'
I need to create a new variable to get values in the Last week column for different key figures and use function 'DATE_TO_PERIOD_CONVERT' in that variable.
Can anyone please explain me the steps as to how to use a function module in a variable so that when the variable is used in a key figure it shows the output.
In other words what I want to know is after creating a Customer exit variable of type Characteristic value how do I refer the above mentioned function moduel and insert the code for the function module into the Customer exit variable that I created.