1. ABAP Training
Function Builder

2. Function Group
A function group is an ABAP program with type F, which is a program created exclusively for containing function modules. Function modules are modular units with interfaces that can be called from any ABAP Program. Function modules that operate on the same objects are combined to form function groups.

3. Function Module Function group Function module Global data objectssy -
subrc
Function module
Administration
Local data objects
Source Code
Global
data objects
Function group
Subroutine
Interface
Import parameters
Export parameters
Changing parameters
Exceptions

4. Example: Cancel dialog box
<Context-Specific Title> !
<context-specific text>
"Data will be lost." No
Yes

5. Function Module Interface
Exceptions
Changing
Export
Function module
POPUP_TO_CONFIRM_LOSS_OF_DATA
Attributes
Nicht Optionale
Parameter
des
Constructors
msen
bei
CREATE OBJECT
versorgt werden
Import
Parameters
TEXTLINE1
TEXTLINE2
TITEL
START_COLUMN
START_ROW
Pass
Value
Optional
...
Ref. type
Description
Source Code !
Non-optional
parameters in the
function module
must be passed
in the
CALL FUNCTION
statement

6. Testing Function Module
Export parameters
Function module
Import parameters
Exception

7. Inserting a Function Module Call in a Program
CALL FUNCTION
'POPUP_TO_CONFIRM_LOSS_OF_DATA'
EXPORTING
textline =
title
IMPORTING
answer =
...
Insert statement
POPUP_TO_CONFIRM_LOSS_OF_DATA
Pattern
System
generates
ABAP code
CASE SY-SUBRC.
Process
return code
Enter
actual
parameters

8. Create a Function Group
Step1. Enter group name begin ‘Y’ or ‘Z’
Step2. Push create

9. Create a Function Module – Step 1
Step1. Enter function module name begin ‘Y’ or ‘Z’
Step2. Push create

10. Create a Function Module – Step 2
Enter short text
Assign Function group

11. Function Module Attributes

12. Maintain Import Parameter
LIKE
TYPE
TYPE REF TO
‘X‘: 非必要輸入
Passing data
Into Function
module

13. Maintain Export Parameter
LIKE
TYPE
TYPE REF TO
Passing data
Into Function
module

14. Maintain Changing Parameter
LIKE
TYPE
TYPE REF TO
‘X‘: 非必要輸入
Passing data
Into Function
module

15. Maintain Tables Parameter
LIKE
TYPE
TYPE REF TO
‘X‘: 非必要輸入

16. Maintain Exceptions

17. Maintain Source code
Activate