External system point of view - BAPI and RFC difference

Hi all,
I have already searched forums and have seen many posts. But none of them are giving exact difference between BAPI and RFC.
Please don't copy paste any previous posts which give differences in definitions and please explain me in simple terms the difference between RFC and BAPI from external system point of view.
Can RFC be used to link SAP to Non-SAP system? If so, why BAPI?
Difference between RFC and RFC Call?
How exception handling is different?
I know that BAPI is based on OOPS concept but if that is the only difference then from external system point of view they should the same.
Regards
Vasu

Hello Vasu
BAPIs implement the so-called "methods" of business objects (like sales order, customer, etc.). However, this OO-concept is just of semantic nature.
I like to make the following equation: BAPI = Dialog (transaction) without dialog
What does this mean? A BAPI executes the very same validations like in the corresponding dialog transaction.
In order to understand the difference between a BAPI and another RFC enabled function module the following hierarchy may be useful:
BAPI = RFC enabled => executes all validations like in dialog transaction
  --> RFC module => may execute similar function like BAPI but does NOT execute all validations
        --> calls local function modules => execute specific function
                                  but not as comprehensive as a BAPI function
             --> may call internal function modules => modules that are intended to be used by SAP only
Regards
  Uwe

Similar Messages

  • Any body explain me the differrence between BAPI and RFC

    Hi gurues,
                   The main difference between rfc and bapi is calling the non sap system. Other than that what r the differrence . How sap modules works other machine without sap is installed.

    The difference is not importat while you understand the concept.
    I think, RFC is the protocol for calling functions from external systems in R/3.
    I understand like BAPI a series of complet functions that SAP offers you for use and model a business use.
    But if I need program a function that can be called for external system i would call it RFC_NAME, because is a unique function that makes a single task.
    In other words, the difference i think is about work idea more than another thing.
    RFC
    A remote function call 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 (as a remote call).
    RFC consists of two interfaces : A calling interface for ABAP Programs and a calling interface for Non-SAP programs.
    The RFC Interface takes care of :-
    Converting all parameter data to the representation needed in the remote system
    Calling the communication routines needed to talk to the remote system.
    Handling communications errors, and notifying the caller, if desired ( using EXCEPTIONS paramater of the CALL FUNCTION).
    BAPI
    BAPIs are standardized programming interfaces (methods) enabling external applications to access business processes and data in the R/3 System.
    BAPIs provide stable and standardized methods to achieve seamless integration between the R/3 System and external applications, legacy systems and add-ons.
    BAPIs are defined in the BOR(Business object repository) as methods of SAP business object types that carry out specific business functions.
    BAPIs are implemented as RFC-enabled function modules and are created in the Function Builder of the ABAP Workbench.
    The most critical difference btwn BAPI and FM is that BAPI can be wrapped in Business objects whereas RFC cant.
    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.
    The following standardized BAPIs are provided:
    Reading instances of SAP business objects
    GetList ( ) With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
    The BAPI GetList() is a class method.
    GetDetail() With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method. BAPIs that can create, change or delete instances of a business object type
    The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
    Create( ) and CreateFromData! ( )
    The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods.
    Change( )
    The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method.
    Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
    The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
    Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
    Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
    Check these Links out
    http://searchsap.techtarget.com/ateQuestionNResponse/0,289625,sid21_cid558752_tax293481,00.html
    http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
    http://www.sap-img.com/fu033.htm
    http://www.sap-img.com/abap/ale-bapi.htm
    Refer following SDN threads:
    Diff. Between BAPI and RFC
    Re: BAPI and RFC
    difference between RFC and BAPI
    Re: Difference Between BAPI and RFC?
    Reward all the helpful answers.

  • What is the diffrence between BAPI and RFC and business object

    Hi Experts,
    Can anybody tel me what is the diffrence between RFC and BAPI , and also what is ther relation with business object?
    Thanx in advance.
    Nilesh Hiwale

    Hi,
    BAPI's are associated with Business Objects and also they are RFC enabled.
    But RFC's are the FM's which can be called from external systems, those FM's can be used in many places based on the applications..
    Check these Links
    whats the difference between BAPI and RFC??
    Diff. Between BAPI and RFC
    Regards
    Kiran

  • Difference between BAPI and RFC?

    Difference between BAPI and RFC?
    also where to use BAPI and where to use RFC?

    Hi,
    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.
    The following standardized BAPIs are provided:
    Reading instances of SAP business objects
    GetList ( )  With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
    The BAPI GetList() is a class method.
    GetDetail()  With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method.  BAPIs that can create, change or delete instances of a business object type
    The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
    Create( ) and CreateFromData! ( ) 
    The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods. 
    Change( ) 
    The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method. 
    Delete( ) and Undelete( )  The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
    The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
    Cancel ( )  Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method. 
    Add<subobject> ( ) and Remove<subobject> ( )  The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
    Regards,
    Prakash

  • Difference Between BAPI And RFC in ABAP

    Hi,
    i want to know difference between BAPI and RFC in SAP,
    can we call SAP GUI screen from NON SAP System Using BAPI.
    Reg,
    Hariharan

    Hi Ravishankar,
    The difference is not importat while you understand the concept.
    I think, RFC is the protocol for calling functions from external systems in R/3.
    I understand like BAPI a series of complet functions that SAP offers you for use and model a business use.
    But if I need program a function that can be called for external system i would call it RFC_NAME, because is a unique function that makes a single task.
    In other words, the difference i think is about work idea more than another thing.
    RFC
    A remote function call 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 (as a remote call).
    RFC consists of two interfaces : A calling interface for ABAP Programs and a calling interface for Non-SAP programs.
    The RFC Interface takes care of :-
    - Converting all parameter data to the representation needed in the remote system
    Calling the communication routines needed to talk to the remote system.
    Handling communications errors, and notifying the caller, if desired ( using EXCEPTIONS paramater of the CALL FUNCTION).
    BAPI
    BAPIs are standardized programming interfaces (methods) enabling external applications to access business processes and data in the R/3 System.
    BAPIs provide stable and standardized methods to achieve seamless integration between the R/3 System and external applications, legacy systems and add-ons.
    BAPIs are defined in the BOR(Business object repository) as methods of SAP business object types that carry out specific business functions.
    BAPIs are implemented as RFC-enabled function modules and are created in the Function Builder of the ABAP Workbench.
    The most critical difference btwn BAPI and FM is that BAPI can be wrapped in Business objects whereas RFC cant.
    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.
    The following standardized BAPIs are provided:
    Reading instances of SAP business objects
    GetList ( ) With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
    The BAPI GetList() is a class method.
    GetDetail() With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method. BAPIs that can create, change or delete instances of a business object type
    The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
    Create( ) and CreateFromData! ( )
    The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods.
    Change( )
    The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method.
    Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
    The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
    Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
    Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
    Check these Links out
    http://searchsap.techtarget.com/ateQuestionNResponse/0,289625,sid21_cid558752_tax293481,00.html
    http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
    http://www.sap-img.com/fu033.htm
    http://www.sap-img.com/abap/ale-bapi.htm
    Refer following SDN threads:
    Diff. Between BAPI and RFC
    Re: BAPI and RFC
    Hope this resolves your query.
    Reward all the helpful answers.
    Regards

  • Difference betrween BAPI and RFC

    Hi All
              Can anyone tell me the difference between BAPI and RFC.
    I am unable to find it out ,except one,ie  BAPI is based on object oriented concept .
    please justify your answers with real scenerios.

    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.
    Difference Between BAPI and RFC
    What is the main difference between BAPI and RFC and difference between BAPI and BDC?
    BAPI is used only when it is available for the particular transaction like Delivery Sales order. but BDC can be used for any
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    BAPI is directly updated the database instead BDC run through the screen flow.
    So BAPI can't handle all the flow logic checking and enhancement put by programmer to faciliate the user requirement.
    Difference between BAPI and BDC:
    BAPI is a higher end usage for tranfering the data from SAP to non-SAP and vice-versa. for ex: if we are using VB application,where in that we want to connect to SAP and retireve the data,and then change and update the data in SAP for that purpose we can use that.
    Apart from that, we can also use it for Uploading/Downloading the data from SAP to Non-SAP like BDC, provided we have an existing BAPI for that.
    BAPI function modules will also do all the checks required for data integrity like Transactions for BDC.
    There is one more advantage using BAPI instead of BDC. When we go for upgradation, there might be pozzibility to change the screen elements for transactions depending on the requirement. In that case,our BDC pgm may or may not work (depending on the screen changes they have made). Unless and until we prepare new BDC we cant use the old BDC pgm. But in BAPI, SAP promises that they are going to keep the old BAPI and for new functionality they will provide an upgraded BAPI. Until we write a new BAPI pgm, we can use the exisitng BAPI pgm.
    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 you 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. It is not possible to connect SAP to Non-SAP systems to retrieve data using RFC alone. RFC can acces the SAP from outside only through BAPI and same is for vice versa access.
    RFC is the protocol used by SAP for remote communication, that is, for communications between remote (independent) systems. RFC is used for communications between two independent SAP systems, or for communications between an SAP system and a non-SAP system, such as an external application. It can also be used for communications between modules on the same system. Using the RFC interfaces you can extend the functionality of R/3 applications from an external program.
    BAPI-step by step
    http://www.sapgenie.com/abap/bapi/example.htm
    list of all bapis
    http://www.planetsap.com/LIST_ALL_BAPIs.htm
    for BAPI's
    http://www.sappoint.com/abap/bapiintro.pdf
    http://www.sappoint.com/abap/bapiprg.pdf
    http://www.sappoint.com/abap/bapiactx.pdf
    http://www.sappoint.com/abap/bapilst.pdf
    http://www.sappoint.com/abap/bapiexer.pdf
    http://service.sap.com/ale
    http://service.sap.com/bapi
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCMIDAPII/CABFAAPIINTRO.pdf
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/CABFABAPIREF/CABFABAPIPG.pdf
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCFESDE8/BCFESDE8.pdf
    http://www.planetsap.com/Bapi_main_page.htm
    http://www.topxml.com/sap/sap_idoc_xml.asp
    http://www.sapdevelopment.co.uk/
    http://www.sapdevelopment.co.uk/java/jco/bapi_jco.pdf
    also refer these threads
    What is the difference between RFC and BAPI?.
    whats difference between rfc and bapi?
    difference between rfc & bapi
    difference between RFC and BAPi
    Difference between BAPI and RFC?
    also chk this
    http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
    regards,
    srinivas
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    closed

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    Regards
    ravinagh Boni

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