Classical Report Events in SAP ABAP

DPM125 — Sun, 03 Aug 2025 06:54:31 +0000

Classical Reports in ABAP use a sequence of predefined events during program execution. These events let you structure your code based on data fetching, formatting, and output rendering.

Event	Description
`LOAD-OF-PROGRAM`	Triggered once when the program is loaded into memory (before anything else)
`INITIALIZATION`	Called before the selection screen is displayed
`AT SELECTION-SCREEN`	Called after user input is entered on the selection screen
`START-OF-SELECTION`	Main logic block, starts after selection screen input
`TOP-OF-PAGE`	Used to print page headers
`END-OF-PAGE`	Used to print page footers
`END-OF-SELECTION`	Called after START-OF-SELECTION, typically for final output
`AT LINE-SELECTION`	Triggered by user double-click (F2) on output
`AT USER-COMMAND`	Triggered when a custom function key is pressed

REPORT zrep_lclclass.

TABLES: mara.
data: lt_mara type table of mara.

" Selection Screen
SELECT-OPTIONS: s_matnr FOR mara-matnr.

" LOAD-OF-PROGRAM

LOAD-OF-PROGRAM.
  WRITE: / '>> Program loaded into memory.'.

  " INITIALIZATION

INITIALIZATION.
  s_matnr-sign   = 'I'.
  s_matnr-option = 'EQ'.
  s_matnr-low    = '1'.
  s_matnr-high = '9999'.
  APPEND s_matnr.

  " AT SELECTION-SCREEN

AT SELECTION-SCREEN.
  IF s_matnr[] IS INITIAL.
    MESSAGE 'Please enter a carrier ID' TYPE 'E'.
  ENDIF.

  " START-OF-SELECTION

START-OF-SELECTION.
  WRITE: / '>> Start of selection'.
  SELECT * FROM mara INTO TABLE lt_mara
  WHERE matnr IN s_matnr.

  IF sy-subrc = 0.
    LOOP AT lt_mara INTO DATA(ls_matnr).
      WRITE: / ls_matnr-matnr,
               ls_matnr-ernam,
               ls_matnr-ersda.
    ENDLOOP.
  ELSE.
    WRITE: / 'No data found'.
  ENDIF.

  " END-OF-SELECTION

END-OF-SELECTION.
  WRITE: / '>> End of selection processing.'.

  " TOP-OF-PAGE

TOP-OF-PAGE.
  WRITE: / 'Material Master Report'.
  WRITE: / '------------------------'.

  " AT LINE-SELECTION

AT LINE-SELECTION.
  MESSAGE 'You clicked a line!' TYPE 'I'.

Output:
Execute

classical report – SAP EWM Help

Classical Report Events in SAP ABAP