Classical Reports in SAP ABAP

Dec 17, 2022

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Preface – This post is part of the ABAP Beginner series.

ABAP is an event driven Programming language. ABAP Report Events are used to handle different kinds of events during runtime. It starts with the event name, followed by the programming codes belonging to that event. Classical reports in SAP ABAP are the reports which contain both selection screens and output screens.

It is advisable to use Comment line to declare the end of an event, since Events do not have a closing Keyword and it ends as soon any other Event starts.

There are different kinds of events in ABAP; SAP has categorized these events together.

Table of Contents

Categories of Classical Report Events in SAP ABAP:

There are four categories of Events in ABAP:

Event Category

Explanation

Events in the Category

Program Constructor Events

Except Pool programs it occurs in every programs.

LOAD-OF-PROGRAM

Reporting Events

These events occur only in Executable Reports.

INITIALIZATION

START-OF-SELECTION

END-OF-SELECTION (obsolete)

Selection Screen Events

These events occur during Selection Screen Processing

AT SELECTION-SCREEN OUTPUT

AT SELECTION-SCREEN

List Events

These events occur during Classical List Processing [List can be a table or consecutive Write statements, etc.]

TOP-OF-PAGE

END-OF-PAGE

AT-LINE-SELECTION

AT USER-COMMAND

AT PFnn

SET USER-COMMAND

Events of Classical Reports in SAP ABAP:

Classical Reports have following events:

LOAD-OF-PROGRAM : First event fired, loads program in memory
INITIALIZATION: Initialize variable
START-OF-SELECTION : Actual Business Logic (After START-OF-SELECTION)
END-OF-SELECTION : To end above
AT SELECTION-SCREEN : To validate Multiple Input fields (After Initialization and before START-OF-SELECTION) (After
AT SELECTION-SCREEN OUTPUT: To manipulate Dynamic screen
AT SELECTION-SCREEN ON
AT SELECTION-SCREEN ON END OF
AT SELECTION-SCREEN ON BLOCK
AT SELECTION-SCREEN ON RADIOBUTTON GROUP
AT SELECTION-SCREEN ON VALUE REQUEST
TOP-OF-PAGE : To print heading
END-OF-PAGE: To print footer

Classical Reports in SAP ABAP – Image Illustration

Programming Guidelines:

Never use Selection Screen Events in Function Module
Use LOAD-OF-SCREEN to load default values for the type of Reports executed via SUBMIT or using a transaction code
Use INITIALIZATION to load default values for the executable type of Reports
It is advised not to specify an event more than once [Except AT-SELECTION-SCREEN & GET event, all other can be specified multiple times.]
If you are not specifying any event name, still specify START-OF-SELECTION to improve readability
After every execution of events NEW-LINE event is executed automatically.