Bdcdata

Question

Hi all,
       Could you please explain me this BDC program logic flow?
data : begin of bdc-data occurs 100.
              include structure bdcdata.
data ; end of bdc_data.
perform dynro using :
'X' 'SAPLMGMW' '0100',
'' ' 'bdc_cursor' 'msichtausw-dytxt(07)',
' ' rmmw-matnr' p_matnr, (~user input)
call transaction 'mm42' using bdc_data mode 'A'.
form dynpro using dynbegin name value.
    clear bdc_data.
    if dynbegin eq 'X',
        move: name to bdc_data-program,
                  value to bdc_data-dynpro,
                   'X' to bdc_data-dynbegin.
   else.
   move : name to bdc_data-program,
              value to bdc_data-fval.
   endif.
   append bdc_data.
end form.
        My main concerns is what is the structure of bdcdata and how 'X' is realted to bdc_data-dynbegin.
Thanks in advance.
Will reward if useful.

Answer 1

hi,
in BDC, we can perform validations on legacy data by using MAPPING logic.
in mapping logic we use structure having name BDCDATA.
<b>fields of BDCDATA structure are....</b>
<b>BDCDATA-program-----> means module pool program which we r used in BDC.
BDCDATA-dynpro-------> means currentl active screen, for which screen we are 
                                    going to pass data.
BDCDATA-dynbegin----> means is the initial or default screen,default vale for this
                                    field is 'X'.
BDCDATA-fnam----
> field name which we are used in validations.
BDCDATA-fval----
>field value which we are used in validations</b>
the BDCADAT table comntains records, which are supported by SAP data type, form this table we pass data into data base tables by using transaction.
regards,
Ashokreddy.