SAP R/3 форум ABAP консультантов

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CALL - Call a Kernel C System Function
Author: Thomas Jung

Kernel C System calls are really just for SAP internal use. If SAP wants to allow a customer to use one, they will generally write a released ABAP function module to expose the Kernel Call. One example of this is the function module TH_USER_INFO. The following is from the on-line help for system call:

CALL - Call a System Function

Note
This statement is for internal use only.

Incompatible changes or further developments may occur at any time without warning or notice.

Basic form 8
CALL cfunc.

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

Effect
Calls the system function cfunc. The relevant function must exist in the file sapactab.h. If you change or recreate a function, you have to compile and link the SAP kernel again. For this, you need the C source code files.
Normally, external programs should be called by RFC with CALL FUNCTION ... DESTINATION.

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

Effect
Passes fields to the called program by reference. With "ID id1", you specify the name of a formal parameter, and with "FIELD f1" the relevant field from the ABAP/4 program. If a formal parameter expects an internal table, the latter is passed in the form "FIELD tab[]".

Example