Prerequisites for using ALV reports

Question

Hi,
We have some of our standard transaction for instance LT23, which seems to have been programmed to be used and viewed with ALV layout. However, this is not the case, it just print using the old list layout.
Are the prerequisites for running ALV report; if so I would like to know them. SAP GUI is 7.20 and the theme is SAP Signature.
Any input is appreciated.
Thanks.

Answer 1

Hi
If you want to use the GRID instead of LIST, yes I don't know if it's a good idea but you can do only that
That means you need to change the function module  L_TO_LIST_DISPLAY, but the ALV is called in form CALL_ALV, so you can create an enhancement in order to call the GRID instead of LIST.
The call should be the same, because the 2 functions (GRID and LIST) have the same interface, so instead of
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
     EXPORTING
          I_CALLBACK_PROGRAM       = SAV_SY_REPID
          I_CALLBACK_PF_STATUS_SET = 'SET_PF_STATUS'
*         I_CALLBACK_USER_COMMAND  = ' '
*         I_STRUCTURE_NAME         =
          IS_LAYOUT                = LAYOUT
          IT_FIELDCAT              = XFIELD
*         IT_EXCLUDING             =
          IT_SPECIAL_GROUPS        = XSP_GROUP[]
*         IT_SORT                  =
*         IT_FILTER                =
*         IS_SEL_HIDE              =
          I_DEFAULT                = 'X'
          I_SAVE                   = 'A'
          IS_VARIANT               = VARIANT
          IT_EVENTS                = XEVENT
* >>>>>>>>>> begin of insertion HP_318150 >>>>>>>>>>
          i_buffer_active          = 'X'
* <<<<<<<<<< end   of insertion HP_318150 <<<<<<<<<<
*         IT_EVENT_EXIT            =
*         IS_PRINT                 =
          I_SCREEN_START_COLUMN    = I_SCREEN_START_COLUMN
          I_SCREEN_START_LINE      = I_SCREEN_START_LINE
          I_SCREEN_END_COLUMN      = I_SCREEN_END_COLUMN
          I_SCREEN_END_LINE        = I_SCREEN_END_LINE
*    IMPORTING
*         E_EXIT_CAUSED_BY_CALLER  =
       TABLES
            T_OUTTAB                 = T_TO_LIST_PLUS
       EXCEPTIONS
            PROGRAM_ERROR            = 1
            OTHERS                   = 2.
  IF SY-SUBRC NE 0.
    MESSAGE E706(L1) WITH 'REUSE_ALV_HIERSEQ_LIST_DISPLAY'.
*   Interner Fehler ist aufgetreten (FB &)
  ENDIF.
....you can insert:
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
     EXPORTING
          I_CALLBACK_PROGRAM       = SAV_SY_REPID
          I_CALLBACK_PF_STATUS_SET = 'SET_PF_STATUS'
*         I_CALLBACK_USER_COMMAND  = ' '
*         I_STRUCTURE_NAME         =
          IS_LAYOUT                = LAYOUT
          IT_FIELDCAT              = XFIELD
*         IT_EXCLUDING             =
          IT_SPECIAL_GROUPS        = XSP_GROUP[]
*         IT_SORT                  =
*         IT_FILTER                =
*         IS_SEL_HIDE              =
          I_DEFAULT                = 'X'
          I_SAVE                   = 'A'
          IS_VARIANT               = VARIANT
          IT_EVENTS                = XEVENT
* >>>>>>>>>> begin of insertion HP_318150 >>>>>>>>>>
          i_buffer_active          = 'X'
* <<<<<<<<<< end   of insertion HP_318150 <<<<<<<<<<
*         IT_EVENT_EXIT            =
*         IS_PRINT                 =
          I_SCREEN_START_COLUMN    = I_SCREEN_START_COLUMN
          I_SCREEN_START_LINE      = I_SCREEN_START_LINE
          I_SCREEN_END_COLUMN      = I_SCREEN_END_COLUMN
          I_SCREEN_END_LINE        = I_SCREEN_END_LINE
*    IMPORTING
*         E_EXIT_CAUSED_BY_CALLER  =
       TABLES
            T_OUTTAB                 = T_TO_LIST_PLUS
       EXCEPTIONS
            PROGRAM_ERROR            = 1
            OTHERS                   = 2.
  IF SY-SUBRC NE 0.
    MESSAGE E706(L1) WITH 'REUSE_ALV_HIERSEQ_LIST_DISPLAY'.
*   Interner Fehler ist aufgetreten (FB &)
  ENDIF.
Max