Problem in making logic on basis of posting period

Question

Hi,
I am working on a FI report in which i have to display the data of previous 3 months on the basis of posting period. When i am selecting the data for the 2 and 3 month, i am doing it with the help of storing the value in variable. here is the code:-
SELECT BUKRS
             HKONT
             GJAHR
             BELNR
             BUDAT
             MONAT
             SHKZG
             DMBTR
             GSBER
             FROM BSIS INTO TABLE T_TAB1
  WHERE  HKONT IN PHKONT AND GSBER IN PGSBER AND GJAHR LE PGJAHR
             AND MONAT LE P1AND BUKRS EQ PBUKRS.
Here,P1 is the variable where posting period value is stored and the pgjahr is the variable  which stores the data for the fiscal year.
Regards,
Ricky
Edited by: Rob Burbank on Jul 19, 2010 2:52 PM

Answer 1

Well, you don't have to use it on the selection screen, you only need to build the range if they enter the period - it's far cleaner (in my opinion) than trying to combine 3 sets of GJAHR and MONAT (or at least the low and the high as the bounded range) in a SELECT statement.  There are many period-to-date functions available in the system. 
If the period/fy values are entered:
- Calculate the high period ending date range using LAST_DAY_IN_PERIOD_GET
- Determine the low period/FY values
- Calculate the low period beginning date using FIRST_DAY_IN_PERIOD_GET
- Populate a BUDAT typed range variable with the low/high dates
- Use a SELECT statement that includes WHERE ... budat IN GR_BUDAT
In this case, whether or not the period is entered and the BUDAT range is filled, the SELECT statement stays the same.