BI 7 - BEX Query Designer variable question

Question

Hi all,
If I have an Entry Variable in the selection screen of a query,  is it possible to populate another variable based on the user input.
e.g.
If I have a Report Date with a mandatory input, and I want a CalMonth variable to be populated based on this.
Is the only way of achieving this through customer exits???
Many thanks,
Shane.

Answer 1

Hi Shane,
You would need to write a code in the CMOD for the variable, something like below:
Declare internal table IT_RANGE with type same as I_T_VAR_RANGE.
Also declare work area WA_RANGE like line of IT_RANGE
when 'variable_name'.
     IF i_step = 2.
     REFRESH e_t_range.
     data: v_date type sy-datum.
     data: v_date1 type sy-datum.
     data: v_month type I length 2.
     data: v_year type I length 4.
     read I_T_VAR_RANGE into WA_RANGE where VNAM = 'variable_name' and IOBJNM = '0cal_day'.
     if sy-subrc = 0.
          v_date = WA_RANGE-LOW. "Date Entered by user     
     endif.
     WA_RANGE-SIGN = 'I'.
     WA_RANGE-OPT = 'EQ'.
     * here we will write our logic to populate the 7 dates as required.
     * and populate the date into v_date1.
        WA_RANGE-LOW = v_date1. "Similar procedure to derive all 7 dates
     append wa_range to e_t_range. "We append all the 7 derived dates to e_t_range
        "(i.e. 7 append statements)
     You should be careful while writing the logic for previous month to handle year ends.
     you can use sample code like below for that:
     v_month = v_date4(2). "month
     v_year = v_date+0(4). "Year
     if v_month = '01'.
          v_month = '12'.
          v_year = v_year - 1.
     endif.
You will probably need an ABAPers help to write the logic for deriving the dates as required.
Here your logic will be like finding end date of previous months which can be done using function module LAST_DAY_OF_MONTHS
similarly you will have to get last dates of 3 quarters, which can be done by determining which quarter the input date falls in.
and same for the year end date.
Hope this helps
Regards,
Joe
Edited by: lazarus_joey on Feb 15, 2012 6:45 PM