.can anybody explain the bdc with help of an example

Question

i am new to bdc .can anybody explain the bdc with help of an example

Answer 1

Hi,
BDC is method to transfer legacy data into R3 system.
Data transfer can be done in any one method below:
BDC
LSMW
Direct Input method
BAPI
Of these BDC is subdivided into 2 types,
Call Transaction and Session method (TCode: SM35)
Let me give the sample prg for Call Transaction method.
tables ZMATMASTER.
DATA : itab like TABLE OF  ZMATMASTER WITH KEY DESCRIPTION with header line.
DATA : IT_BDC LIKE TABLE OF BDCDATA WITH HEADER LINE.
DATA : IT_MSG LIKE TABLE OF BDCMSGCOLL WITH HEADER LINE.
CALL FUNCTION 'GUI_UPLOAD'
  EXPORTING
    FILENAME                      = 'C:\Material.txt'
    FILETYPE                      = 'ASC'
    HAS_FIELD_SEPARATOR           = '#'
  TABLES
    DATA_TAB                      = itab.
LOOP AT ITAB.
    PERFORM BDC_HEADER USING 'ZFILE_DOWNLOAD' 9001.
    PERFORM BDC_DATA   USING 'BDC_OKCODE' 'SAVE'.
    PERFORM BDC_DATA   USING 'ZMATMASTER-MNO' ITAB-MNO.
    PERFORM BDC_DATA   USING 'ZMATMASTER-DESCRIPTION' ITAB-DESCRIPTION.
    PERFORM BDC_DATA   USING 'ZMATMASTER-PLANT' ITAB-PLANT.
    PERFORM BDC_DATA   USING 'ZMATMASTER-SLOC' ITAB-SLOC.
    PERFORM BDC_DATA   USING 'ZMATMASTER-ROL' ITAB-ROL.
    PERFORM BDC_DATA   USING 'ZMATMASTER-UOM' ITAB-UOM.
    PERFORM BDC_DATA   USING 'ZMATMASTER-PRICE' ITAB-PRICE.
    PERFORM BDC_DATA   USING 'ZMATMASTER-DDAYS' ITAB-DDAYS.
    PERFORM BDC_DATA   USING 'ZMATMASTER-FLOT' ITAB-FLOT.
ENDLOOP.
CALL TRANSACTION 'ZTRANSCODES'
                 USING IT_BDC
                 MODE 'A'
                 UPDATE 'S'
                 MESSAGES INTO IT_MSG.
FORM BDC_HEADER USING PROGRAMNAME SCREENNO.
     IT_BDC-PROGRAM = PROGRAMNAME.
     IT_BDC-DYNPRO = SCREENNO.
     IT_BDC-DYNBEGIN = 'X'.
     APPEND IT_BDC.
ENDFORM.
FORM BDC_DATA USING FNAME FVALUE.
     CLEAR IT_BDC.
     IT_BDC-FNAM = FNAME.
     IT_BDC-FVAL = FVALUE.
     APPEND IT_BDC.
ENDFORM.
In session method, log file can be viewed.
Foll. is the example for session method.
REPORT ZBDC_BATCH1                                                 .
TABLES: ZEMPREC.
DATA : BEGIN OF STR1,
       EMPNO(3),
       EMPNAME(15),
       SALARY(9),
       DOJ(10),
       END OF STR1.
DATA: FNAME(100) TYPE C VALUE 'C:\EMPLOYEE.TXT.,
DATA : BDCITAB LIKE TABLE OF BDCDATA WITH  HEADER LINE,
       MSGITAB LIKE TABLE OF BDCMSGCOLL WITH HEADER LINE.
OPEN DATASET: FNAME FOR INPUT IN TEXT MODE ENCODING DEFAULT.
perform open_group.
DO .
  READ DATASET FNAME INTO  STR1.
  IF SY-SUBRC <> 0 .
    EXIT.
  ENDIF.
  perform bdc_dynpro      using 'ZBDC_BATCH' '9000'.
  perform bdc_field       using 'ZEMPREC-EMPNO'
                                STR1-EMPNO.
  perform bdc_field       using 'ZEMPREC-EMPNAME'
                                STR1-EMPNAME.
  perform bdc_field       using 'ZEMPREC-SALARY'
                                STR1-SALARY.
  perform bdc_field       using 'ZEMPREC-DOJ'
                                STR1-DOJ.
ENDDO.
CLOSE DATASET FNAME.
perform bdc_transaction using 'ZTCODE'.
perform close_group.
CLOSE DATASET FNAME1.
CALL TRANSACTION 'SM35'.
  FORM open_group
FORM open_group .
  CALL FUNCTION 'BDC_OPEN_GROUP'
    EXPORTING
      CLIENT   = SY-MANDT
      GROUP    = 'sample'
      HOLDDATE = SY-DATUM
      KEEP     = 'X'
      USER     = SY-UNAME.
ENDFORM.                    "open_group
  FORM bdc_transaction
  -->  TCODE
form bdc_transaction USING TCODE.
  CALL FUNCTION 'BDC_INSERT'
    EXPORTING
      TCODE     = 'ZTCODE'
    TABLES
      DYNPROTAB = BDCITAB.
ENDFORM.                    "bdc_transaction
  FORM close_group
FORM close_group.
  CALL FUNCTION 'BDC_CLOSE_GROUP'.
ENDFORM.                    "close_group
  FORM BDC_DYNPRO
  -->  PROGRAM
  -->  SCREEN
FORM BDC_DYNPRO USING PROGRAM SCREEN.
  CLEAR BDCITAB.
  BDCITAB-PROGRAM = PROGRAM.
  BDCITAB-DYNPRO = SCREEN.
  BDCITAB-DYNBEGIN = 'X'.
  APPEND BDCITAB.
ENDFORM.                    "BDC_DYNPRO
  FORM BDC_FIELD
  -->  FNAM
  -->  FVAL
FORM BDC_FIELD USING FNAM FVAL.
  CLEAR BDCITAB.
  BDCITAB-FNAM = FNAM.
  BDCITAB-FVAL = FVAL.
  APPEND BDCITAB.
ENDFORM.                    "BDC_FIELD
Hope now u get an idea abt BDC.
Regards,
Router