SAP CALL-

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Standard SAP Help for CALL_SYSTEM_FUNCTION

CALL - System Function Call
ABAP Code Snippet
• CALL cfunc ABAP_STATEMENT_INT

ABAP_BASIC_FORM_8 CALL cfunc.
• FIELD CALL cfunc
• ID CALL cfunc

ABAP Addition
... ID id1 FIELD f1 ... ID idn FIELD fn

What does it do? Calls the system function cfunc. A flat character-like data object containing the name of the function can be specified for cfunc. The function must be entered in the file sapactab.h. Modifying a function or creating a new function requires the ABAP kernel to be compiled again and linked. This requires the C source code files.

Latest notes:If possible, use kernel methods instead of system functions. External programs should be called using the RFC mechanism: CALL FUNCTION... DESTINATION . With some critical C functions, the system performs an authorization check automatically. If the user does not have the appropriate authorization, a runtime error occurs. The authorization can be checked using the function module AUTHORITY_CHECK_C_FUNCTION. The use of the system function SYSTEM, which can be used to execute operating system statements, is not recommended and can be deactivated using the profile parameter rdisp/call_system. If called, it the function then raises a non-handleable exception. Specifying a system function dynamically is one of the dynamic programming techniques.
ABAP Code Snippet

Security Note

ABAP Code Snippet If used wrongly, dynamic calls of program units can present a serious security risk. Names of program units that are passed to a program from the outside must be checked thoroughly before being used in dynamic calls. The system class CL_ABAP_DYN_PRG , for example, can be used to do this.
ABAP Code Snippet
ABAP Code Snippet See System Command Injections .

ABAP Addition

What does it do? Passes fields to the called program using pass by reference. ID id1 is used to specify the name of a formal parameter; FIELD f1 is used to specify the associated field from the ABAP program. If a formal parameter expects an internal table, the latter is passed in the form FIELD tab[].



Example ABAP Coding
DATA RESULT(8).
CALL 'MULTIPLY' ID 'P1' FIELD '9999'
ID 'P2' FIELD '9999'
ID 'RES' FIELD RESULT.



Runtime Exceptions
Non-catchable Exceptions
Reason for error:
No authorization to call this C function.
Runtime error:
CALL_C_FUNCTION_NO_AUTHORITY
Reason for error:
The system function specified is unknown.
Runtime error:
CALL_C_FUNCTION_NOT_FOUND
Reason for error:
The system function SYSTEM is deactivated.
Runtime error:
CALL_SYSTEM_DISABLED

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