Selection screen - search help with dynamic sql query

Question

hey ,
is it possible to change the search help of the selection field ?
when i create the range table i put a data element :
create a range table that consists of this new data element
  LT_RANGE_TABLE = WD_THIS->M_HANDLER->CREATE_RANGE_TABLE( I_TYPENAME = 'S_CARR_ID' ).
can i control the search help via the the data element or by other methods ?
i want that when the user press F4 the values that will show is the result of a sql query that i will write .
is it possible ?
thanks
ASA.

Answer 1

Hi,
yes it is possible...
This is my test code for say personal number select options...
lt_range_table = wd_this->m_handler->create_range_table(
  i_typename = 'PERSNO' ).
add a new field to the selection
  wd_this->m_handler->add_selection_field(
  i_id = 'PERSNO'
I_VALUE_HELP_TYPE = if_wd_value_help_handler=>CO_PREFIX_SEARCHHELP
I_VALUE_HELP_ID = 'ZHELP_WDA_PERNR'   "this is the custom search help we need to create
I_NO_INTERVALS = abap_true
  it_result = lt_range_table
  i_read_only = read_only ).
do the following:
1) copy the std function module: F4IF_SHLP_EXIT....to ZF4IF_SHLP_EXIT_pernr (in my case i am testing for pernr so my fm
name is like that....obviously it can be anything you want...under the recommended naming convention)
2) look for "STEP SELECT"
STEP SELECT    (Select values)
3)write the code as follows:
"NOTE: this is my testing code...but you can build your logic on it....
IF CALLCONTROL-STEP = 'SELECT'.
types: begin of zpri_listing,
pernr type PERSNO,
end of zfund_listing.
DATA: lo_syuname TYPE sy-uname.
data itab type standard table of Zpri_LISTING.
data wa type zpri_listing.
    DATA : t_fields LIKE TABLE OF shlp_tab-fielddescr.
    DATA : w_fields LIKE LINE OF shlp_tab-fielddescr.
    DATA : l_fname TYPE dfies-lfieldname.
    IF lo_syuname <> sy-uname.  "means we were here before and ITAB is filled...fm retains its data values...unless refresh happens
"this if condition make sure that we do not do this select all the time as long as the same user is logged in...
"a user can press f4 many times...you might want to enhance this logic a little bit more for performance
      lo_syuname = sy-uname.
))))))))))))))HERE DO YOUR SELECT(((((((((((((((((((((
select pernr from "sometable" into table itab.
    ENDIF.
    LOOP AT shlp_tab.
      LOOP AT shlp_tab-fielddescr INTO w_fields.
        l_fname = w_fields-fieldname.
        CALL FUNCTION 'F4UT_PARAMETER_RESULTS_PUT'
          EXPORTING
            parameter               = w_fields-fieldname
          OFF_SOURCE              = 0
          LEN_SOURCE              = 0
          VALUE                   =
           fieldname               = l_fname
          TABLES
            shlp_tab                = shlp_tab
            record_tab              = record_tab
            source_tab              =  itab
          CHANGING
            shlp                    = shlp
            callcontrol             = callcontrol
         EXCEPTIONS
           parameter_unknown       = 1
           OTHERS                  = 2
      ENDLOOP.
    ENDLOOP.
    IF sy-subrc EQ 0.
      callcontrol-step = 'DISP'.
    ELSE.
      callcontrol-step = 'EXIT'.
    ENDIF.
    EXIT. "Don't process STEP DISP additionally in this call.
  ENDIF.
4) save and activate this function module...
5) go to se11 and create "Elementary srch hlp"....
6) fill out all the necessary fields...i am assuming that you already know how to create the search helps...
look for this field: "Search help exit" and put your function name which you created in the above steps...
in this example i have: ZF4IF_SHLP_EXIT_pernr....
7) create and activate the search help....
hope this helps...i just tested this and it is working for me....
Thanks..
AS...