How to use varaible in place of logical operator in query

Question

Hi Experts,
How can we use a variable in place of logical operator (OR, AND) ?
For ex:
select * from sflight where carrid = 'LH' AND connid = 100.
data x type string.
x = 'AND'.
Now, I want to replace AND with the variable x.
Query will be:
select * from sflight where carrid = 'LH'  x connid = 100.
I am doing this because user can select any logical operator while creating the search criteria at run time .
I already tried this but i am getting following compilation error:
Error: Incorrect expression used in place of logical expression.

Answer 1

hi,
Check out this sample code
Display of flight connections after input of airline and flight number:
PARAMETERS: carr_id TYPE spfli-carrid,
            conn_id TYPE spfli-connid.
DATA:       where_clause TYPE  STRING,
            and(4),
            wa_spfli TYPE spfli.
IF carr_id IS NOT INITIAL.
  CONCATENATE 'CARRID = ''' carr_id '''' INTO where_clause.
  and = ' AND'.
ENDIF.
IF conn_id IS NOT INITIAL.
  CONCATENATE where_clause and ' CONNID = ''' conn_id ''''
    INTO where_clause.
ENDIF.
SELECT * FROM spfli INTO wa_spfli WHERE (where_clause).
  WRITE: / wa_spfli-carrid, wa_spfli-connid, wa_spfli-cityfrom,
           wa_spfli-cityto, wa_spfli-deptime.
ENDSELECT.
Regards,
Santosh