topic Re: diff between bapi & Rfc,and diff between rfc & function module in Application Development and Automation Discussions

diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:28:57 GMT

hi,

Iam srinivas can any one plz tell me difference between BAPI and RFC,and

RFC and FUNCTION MODULE.

thanks&regards.

Srinivas Reddy.

Re: diff between bapi & Rfc,and diff between rfc & function module

former_member188829 — Mon, 26 Nov 2007 08:31:28 GMT

Hi,

check this thread

Message was edited by:

Vishnu Reddy

Re: diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:34:43 GMT

Hi,

Visit

Regards,

Vani

Re: diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:35:59 GMT

Hi Srinivas,

RFC are nothing but Function modules which are remotely enabled so that they can be calles from other R/3 systems.Whereas BAPI's are function modules used nowadays to replace BDC's for updation or changes to standard tables.

U can also refeer to the links given below:

http://www.geekinterview.com/question_details/40974

http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm

http://searchsap.techtarget.com/loginMembersOnly/1,289498,sid21_cid558752,00.html?NextURL=http%3A//searchsap.techtarget.com/ateQuestionNResponse/0%2C289625%2Csid21_cid558752_tax293481%2C00.html

Thanks

Vasudha

Re: diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:36:55 GMT

hi,

bapi is interface which are all developed already by RFC. ALL BAPI ARE rfc.

RFC is nothing but u can create a function module and make it as rfc enabled.

ie u can can call an rfc between different servers but not the normal function module.

regards

karthik

***reward points if this is useful

Re: diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:38:59 GMT

BAPI:

BAPI is an API method of a business object which intern is a RFC enabled function module. Business objects are objects in their own sense which involve with a business process.

RFC:

Remote Function Call (RFC) is a call to a function module running in a system different from the caller's. The remote function can also be called from within the same system, but usually caller and callee will be in differene system. RFC allows for remote calls between two SAP Systems (R/3 or R/2) or between an SAP System and a non-SAP System.

FUNCTION MODULE:

Function modules are special external subroutine stored in a central library. The R/3 system provides numerous predefined functin modules that you can call from your ABAP/4 programs. The function modules have global presence and can return value.+

Rewards if useful.

Re: diff between bapi & Rfc,and diff between rfc & function module

Former Member — Mon, 26 Nov 2007 08:42:08 GMT

Function modules are modularzation elements in the ABAP programming language. The encapsulate some function that can be reused. They provide an interface or signature in which to pass data to and from the function module. RFC is a remote enabled function module. All you need to do is set the flag on the attributes tab of the function module and you have an RFC. A BAPI is nothing more than a function module. BAPIs usualy contain the logic for some business function, like "Create Sales Order", or "Change Purchase Order". Again they provide an interface to pass data to and get data from the BAPI. You will never see "Exceptions" in a BAPI as they are designed to be called from other systems, and may no be able to handle exceptions. Also, you will never see a BAPIs signature change. If SAP feels the need to change the signature of the BAPI, then will create a new bapi. Example, is BAPI_SALESORDER_CREATEFROMDAT1 and BAPI_SALESORDER_CREATEFROMDAT2. They won't change the signature, but they will create a new one and incorporate the change

Remote Function Call:

RFC is an SAP interface protocol. Based on CPI-C, it considerably simplifies the programming of communication processes between systems.

RFCs enable you to call and execute predefined functions in a remote system - or even in the same system.

RFCs manage the communication process, parameter transfer and error handling.

http://help.sap.com/saphelp_47x200/helpdata/en/22/042860488911d189490000e829fbbd/frameset.htm.

BAPI

BAPI stands for Business API(Application Program Interface).

A BAPI is remotely enabled function module

ie it can be invoked from remote programs like standalone JAVA programs, web interface etc..

You can make your function module remotely enabled in attributes of Function module but

A BAPI are standard SAP function modules provided by SAP for remote access.

Also they are part of Businees Objest Repository(BOR).

BAPI are RFC enabled function modules. the difference between RFc and BAPI are business objects.

You create business objects and those are then registered in your BOR (Business Object Repository)

which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA.

In this case u only specify the business object and its method from external system

in BAPI there is no direct system call. while RFC are direct system call.

Some BAPIs provide basic functions and can be used for most SAP business object types.

These BAPIs should be implemented the same for all business object types.

Standardized BAPIs are easier to use and prevent users having to deal with a number of different BAPIs.

Whenever possible, a standardized BAPI must be used in preference to an individual BAPI.