Flow-logic

Question

Hi!
I need to create a logic in class to check the list pricing
For that I ahve created a method with follwoing parameters
IV_KNUMV     Importing     Type     KNUMV
IV_KPOSN     Importing     Type     KPOSN
RV_IS_LIST     Returning     Type     BOOLEAN
Now for this I need to create a logic for the code based on the
follwoing steps. I havent created a class before , but I tried it
though its giving me errors and hence I am unable to get through.
Could someone please help me out with this .
The steps are as mentioned below. In teh steps there is a ztable
that had to be created which I have done and the fields for the
table are as follows.
table name : ZSD_PRICE_TYPE
MANDT     MANDT     CLNT     3     0     Client
KAPPL     KAPPL     CHAR     2     0     Application
KSCHL     KSCHA     CHAR     4     0     Condition type
KOTABNR     KOTABNR     NUMC     3     0     Condition table
ZPRICE_TYPE     ZPRICE_TYPE     NUMC     2     0     Price type flag
the steps are as follows:-
Determine if Condition is Active or Inactive.  Only go forward with Active conditions.
For each item, read KONV with the Condition Type, DocCond and Item No.
Determine if condition is Active (KONV-KINAK).  If active, get the Access # (KONV-KOLNR).  Example:  60.
Read Table T685 with Application = V, Condition Type from KONV (eg. ZPRL)
to get the Access sequence name (T685-KOZGF).  This can be the same or different from the condition type.
Then Read Table T682I with Application = V,
Access Sequence = T685_KOZGF and Access # (KONV-KOLNR)
to return the Table # (T682I-KOTABNR).  For example, 901.
Read the Z* table with Condition Type from KONV and Table # from
T682I to determine if the table is 1 (List) or 2 (Off List).  Set flag accordingly.
Loop through the same logic for all conditions for the same
item to determine the List or Off List setting of each.
At end of loop, if any of the active records = 2 (Off List),
the item is considered Off List.  Else List.
Thanks
Aarav

Answer 1

I have teh code but its giving em exception and more so I need to loop through the same logic for all conditions for the same item to determine the list or off list setting of each . If I can get some help on it would be great.
method CHECK_LIST_PRICING.
data:  zkotabnr type c length 15,
         zkonv type  konv,
         zkozgf type T685-kozgf,
         zt685 type standard table of t685.
  select * from konv
           into zkonv where kinak = ' ' and knumv eq iv_knumv and kposn eq iv_kposn.
    loop at zt685 into zkozgf.
      select single kozgf into zkozgf from T685 where kappl = 'V' and kschl = zkonv-kschl.
      if sy-subrc eq 0.
        select single kotabnr into zkotabnr
                              from T682I
                              where kappl = 'V' and kolnr eq zkonv-kolnr
                                    and kozgf eq ( select kozgf
                                                          from T685
                                                          where kappl = 'V' and kschl = zkonv-kschl ).
        if sy-subrc eq 0.
          select single ZPRICE_TYPE into RV_IS_LIST from (zkotabnr) where kschl eq zkonv-kschl.
        endif.
      endif.
    endloop.
  endselect.
endmethod.
Thanks