Data Interfaces

REMOTE FUNCTION CALL (RFC)
SAP system A
ABAP/4 program
...
CALL FUNCTION 'FUNC'
DESTINATION 'DEST'
EXPORTING
IMPORTING
CHANGING
TABLES
EXCEPTIONS
COMMUNICATION_FAILURE = 1
SYSTEM_FAILURE = 2
...
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f1 = a1
f2 = a2
f3 = a3
t1 = tab
SAP system B
ABAP/4 function module
FUNCTION FUNC.
...
ENDFUNCTION.
External program
C routine
Function modules can also be called by remote systems if the function module is designed for RFC.
If SAP R/2 or R/3 is the RFC server system, the function module name is FUNC. If a C program is the
RFC server program, FUNC is the name of a function installed previously with RFC API.
DEST is the symbolic destination of the partner system. The destination must be defined in the table
RFCDES.
You can use the EXPORTING and IMPORTING parameters to pass and receive field or field string
values.
With CHANGING, you can pass values of fields or field strings to or from the function module.
With TABLES, you can pass references to internal tables. Table parameters should have homogenous
data types.
All interface parameters must refer to Dictionary reference structures (unlike local calls to function
modules).
You use the EXCEPTIONS parameter to specify the exceptions the calling program is to handle itself.
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