How to do a search with multiple non-obligatory Input fields? - abap

Question

I would like to ask how to do a basic search filtering in a selection screen that has multiple input fields which aren't required.
I tried to do it by using multiple IF statements followed by WHERE clauses which solves my current problem but its not fully correct, if i work with only a few inputs (2 at the moment, 'ID' and 'Number'), the code isn't too long, but if its over 10 or so it feel wrong to do it this way
What i tried so far was approximately like this :
IF lv_id IS INITIAL and lv_nr IS INITIAL.
SELECT * from DBase INTO TABLE Local_Table.
ELSEIF lv_id IS NOT INITIAL AND lv_nr IS INITIAL.
SELECT * from DBase INTO TABLE Local_Table WHERE ID = lv_nr.
ELSEIF lv_id IS INITIAL AND lv_nr IS NOT INITIAL.
SELECT * from DBase INTO TABLE Local_Table WHERE Number = lv_nr.
ELSEIF lv_id IS NOT INITIAL AND lv_nr IS NOT INITIAL.
SELECT * from DBase INTO TABLE Local_Table WHERE ID = lv_id AND Number = lv_nr.
The expected result is for the search to get executed correctly by having no input or multiple non-obligatory inputs, without having to write a very long code in case the number of inputs is high.

Answer 1

you can use the IN Operator in your WHERE clause when you have multiple conditions.
First You need to define a Selection Table for every parameter and have to fill them or leave them empty.
types: begin of myselopt ,
sign type char1 ,
option type char2 ,
low type ... (depends on the type you want select)
high type ... ,
end of myselopt .
types : t_selopt type table of myselopt .
data: gt_selopt type t_selopt ,
gt_selopt_2 type t_selopt_2 . #needs to be defined first
if lv_id is not initial .
insert value #( sign = 'I' option = 'EQ' low = lv_id ) into table gt_selopt .
endif .
if lv_nr is not initial .
insert value #( sign = 'I' option = 'EQ' low = lv_nr ) into table gt_selopt_2 .
endif .
You have to do this for every Parameter you want to query. And your query would look like this
select * from dbaste into table local_table where id in gt_selopt
and number in gt_selopt_2 .

Answer 2

You can define your input fields as SELECT-OPTIONS (with optional NO INTERVALS NO-EXTENSION to mimick the look of PARAMETERS). Then just use the IN operator in your WHERE clause:
REPORT.
DATA: your_ztable TYPE your_ztable.
SELECT-OPTIONS: s_id FOR your_ztable-id NO INTERVALS NO-EXTENSION,
s_nr FOR your_ztable-number NO INTERVALS NO-EXTENSION.
AT SELECTION-SCREEN.
SELECT * FROM your_ztable
WHERE id IN #s_id
AND number IN #s_nr
INTO TABLE #DATA(local_table).

Answer 3

What about this approach with concatenated where conditions?
DATA:
lv_where TYPE string.
IF lv_id IS NOT INITIAL.
CONCATENATE ' AND ID' space '=' space '"' lv_id '"' INTO lv_where.
ENDIF.
IF lv_nr IS NOT INITIAL.
CONCATENATE ' AND Number' space '=' space '"' lv_nr '"' INTO lv_where.
ENDIF.
IF lv_where IS NOT INITIAL.
SHIFT lv_where By 5 PLACES. " to remove leading _AND_ (
ENDIF.
SELECT * from DBase INTO TABLE Local_Table WHERE (lv_where).