SELECT with pattern CP '50*' is not working on material numbers MATNR

Question

Hello,
I have a specific matchcode for searching on material numbers with a function module as selection method.
In this function module, the SELECT clause is built dynamically as bellow.
      SELECT (temp3)
        INTO CORRESPONDING FIELDS OF TABLE result_tab  UP TO CALLCONTROL-MAXRECORDS ROWS
         FROM (temp)
         WHERE (temp2) .
In the "temp2" variable, I use RANGES for the selection simply built with values of SELECT-OPTIONS coming from the search help selection screen.
I am facing the following problem :
When a search is executed on material number with the following pattern '50*' --> nothing is found !
When I run a search on '50575' --> the material number is found !
I expect it is a problem of convertion routines (external to internal format) but I am not able to fix a solution...
We are in SAP_BASIS 700.

Answer 1

I think it can be done.
I have -    
CONCATENATE  'Z+_'   '00+' INTO  r_ranges-low .
    r_ranges-sign = 'I'.
    r_ranges-option = 'CP'.
    APPEND r_ranges.
    SELECT  ar_object FROM toasp
      INTO CORRESPONDING FIELDS OF table lt_toasp
       WHERE ar_object IN r_ranges.
And it returns all values with pattern 'Z_00'.
(Z1_001, Z1_002 etc.)
If the pattern '50*' is not working, you could try using '50+++'.
Regards,
MaryM