RFC (Remote Function Call)

Function Module:-


1. Normal Function Module
2. RFC ( Remote Function Calling).
3. Update Module.
         1. Start Immed.
         2. Immed Start no Restarting.
         3. Start delayed
         4. Coll Run

Normal Function Module:

RFC(Remote Function Module):- A Remote Function call is a call to a function module running in different system . RFC allow to calls between SAP to SAP and SAP to Non SAP system.
RFC Consists of following interface.
1. A Calling interface for ABAP Program.
        ABAP program can call the a remote function using the
        CALL Function .........Destination Statement.
Destination parameter displays an entry in the RFCDES table (Which is defined with the transaction SM59).
2. Calling Interface for Non-SAP program
     To help implement RFC partner program in non-sap Systems Sap provides the
     External Interface.

Transactional RFC(tRFC) - To make the execution of RFC function more reliable , safe, and independent from the availability of the RFC server system, this is ensure that the called function module is executed only once in the RFC server system.
transaction call RFC data must store temporary in sap data base in the RFC client systems. when processing is  completed this must be reported back to the calling ABAP Program.
All transactional remote function calls are stored in the tables ARFCSSTATE and ARFCSDATA.