Learn How to do sap bdc recording with SHDB transaction and create BDC program from it

Code
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report ZVK11_BDC_DEMO
       no standard page heading line-size 255.

include bdcrecx1.

types begin of tp_itab,
         vkorg(4),
         vtweg(2),
         matnr(18),
         amount(15),
       end of tp_itab.

data gt_itab type STANDARD TABLE OF tp_itab,
       gs_itab type tp_itab.

data gv_file type string.


SELECTION-SCREEN skip.
 PARAMETERS P_FILE TYPE IBIPPARMS-PATH OBLIGATORY.
SELECTION-SCREEN SKIP.

AT SELECTION-SCREEN ON VALUE-REQUEST FOR P_FILE.

CALL FUNCTION 'F4_FILENAME'
* EXPORTING
*   PROGRAM_NAME        = SYST-CPROG
*   DYNPRO_NUMBER       = SYST-DYNNR
*   FIELD_NAME          = ' '
 IMPORTING
   FILE_NAME           P_FILE.



start-of-selection.

 clear gv_filegt_itab[].

  gv_file p_file.

 CALL FUNCTION 'GUI_UPLOAD'
   EXPORTING
     FILENAME                      GV_FILE
    FILETYPE                      'ASC'
    HAS_FIELD_SEPARATOR           'X'
*    HEADER_LENGTH                 = 0
*    READ_BY_LINE                  = 'X'
*    DAT_MODE                      = ' '
*    CODEPAGE                      = ' '
*    IGNORE_CERR                   = ABAP_TRUE
*    REPLACEMENT                   = '#'
*    CHECK_BOM                     = ' '
*    VIRUS_SCAN_PROFILE            =
*    NO_AUTH_CHECK                 = ' '
*  IMPORTING
*    FILELENGTH                    =
*    HEADER                        =
   TABLES
     DATA_TAB                      gt_itab
*  CHANGING
*    ISSCANPERFORMED               = ' '
  EXCEPTIONS
    FILE_OPEN_ERROR               1
    FILE_READ_ERROR               2
    NO_BATCH                      3
    GUI_REFUSE_FILETRANSFER       4
    INVALID_TYPE                  5
    NO_AUTHORITY                  6
    UNKNOWN_ERROR                 7
    BAD_DATA_FORMAT               8
    HEADER_NOT_ALLOWED            9
    SEPARATOR_NOT_ALLOWED         10
    HEADER_TOO_LONG               11
    UNKNOWN_DP_ERROR              12
    ACCESS_DENIED                 13
    DP_OUT_OF_MEMORY              14
    DISK_FULL                     15
    DP_TIMEOUT                    16
    OTHERS                        17
           .
 IF SY-SUBRC <> 0.
* Implement suitable error handling here
 ENDIF.


perform open_group.

loop at gt_itab into gs_itab.

perform bdc_dynpro      using 'SAPMV13A' '0100'.
perform bdc_field       using 'BDC_CURSOR'
                              'RV13A-KSCHL'.
perform bdc_field       using 'BDC_OKCODE'
                              '=ANTA'.
perform bdc_field       using 'RV13A-KSCHL'
                              'ZBAS'.

perform bdc_dynpro      using 'SAPLV14A' '0100'.
perform bdc_field       using 'BDC_CURSOR'
                              'RV130-SELKZ(01)'.
perform bdc_field       using 'BDC_OKCODE'
                              '=WEIT'.

perform bdc_dynpro      using 'SAPMV13A' '1004'.
perform bdc_field       using 'BDC_CURSOR'
                              'KOMG-VTWEG'.
perform bdc_field       using 'BDC_OKCODE'
                              '/00'.
perform bdc_field       using 'KOMG-VKORG'
                              gs_itab-vkorg.           "'1024'.
perform bdc_field       using 'KOMG-VTWEG'
                              gs_itab-vtweg.            "'24'.

perform bdc_dynpro      using 'SAPMV13A' '1004'.
perform bdc_field       using 'BDC_CURSOR'
                              'KONP-KBETR(01)'.
perform bdc_field       using 'BDC_OKCODE'
                              '/00'.

perform bdc_field       using 'KOMG-MATNR(01)'
                              gs_itab-matnr.                 "'11000004'.

CONDENSE gs_itab-AMOUNT.
perform bdc_field       using 'KONP-KBETR(01)'
                              gs_itab-amount.                   "'             150'.

perform bdc_dynpro      using 'SAPMV13A' '1004'.
perform bdc_field       using 'BDC_CURSOR'
                              'KOMG-MATNR(01)'.
perform bdc_field       using 'BDC_OKCODE'
                              '=SICH'.
perform bdc_transaction using 'VK11'.


clear gs_itab.
endloop.

perform close_group.