Can you "combine" criteria for 2 or more fields on a Selection Screen?

Question

Good day everyone,
Here's my question:  I understand that I can put fields on a Selection Screen and pre-fill them with data values.  In this particular case, I want to pre-fill a couple of hidden fields with data values that will be used as criteria when I read data from the database; however, I need to pull back records that have this COMBINATION of data.  For example:
WERKS     BTRTL
Z002      Z001
Z002      Z002
Z003      Z001
Z003      Z002
So in my SQL, if I say "werks IN s_werks" and "btrtl IN s_brtrl", true, it will still work.  But really, I need to say "if werks = 'z002' and btrtl = 'z001', or werks = 'z002' and btrtl = 'z002', etc.  I can't rely on the simple "IN" functionality because it's possible a new value could be added in the future:
WERKS     BTRTL
Z003      Z003
So if I use the "IN" logic and the record has werks = 'Z002' and btrtl = 'Z003', it would be returned.  But I really don't want it returned, since a combination of werks = 'Z002' and btrtl = 'Z003' doesn't exist in my table of valid combinations.
Is this even possible to do in a Selection Screen?  Do I go ahead and populate the fields separately, use the "IN" functionality, then spin through my resulting internal table and delete anything that doesn't match my "table" of valid combinations?  Do I skip putting these on a Selection Screen completely and check the values in my SQL statement?
Thanks in advance -- points, as always, will be given.

Answer 1

Hi
Yuo can try to use FOR ALL ENTRIES option.
IF you have:
WERKS BTRTL
Z002 Z001
Z002 Z002
Z003 Z001
Z003 Z002
You should do something like that:
DATA: BEGIN OF <TAB_SEL> OCCURS 1,
       WERKS TYPE WERKS,
       BTRTL TYPE BTRTL,
      END   OF <TAB_SEL>.
WERKS BTRTL
<TAB_SEL>-WERKS = 'Z002'. <TAB_SEL>-BTRTL = 'Z001'.
APPEND <TAB_SEL>.
<TAB_SEL>-WERKS = 'Z002'. <TAB_SEL>-BTRTL = 'Z002'.
APPEND <TAB_SEL>.
<TAB_SEL>-WERKS = 'Z003'. <TAB_SEL>-BTRTL = 'Z001'.
APPEND <TAB_SEL>.
<TAB_SEL>-WERKS = 'Z003'. <TAB_SEL>-BTRTL = 'Z002'.
APPEND <TAB_SEL>.
SELECT * FROM <TABLE> INTO TABLE ITAB
   FOR ALL ENTRIES IN <TAB_SEL>
                   WHERE WERKS = <TAB_SEL>-WERKS
                      AND BTRTL = <TAB_SEL>-BTRTL.
In this case you need to fill correctly the internal table <TAB_SEL> with the all combinations.
Max