difference between rfc & bapi

Former Member · ‎2008 Mar 25

Hi all,

this is jyothi.what is the difference between rfc & bapi.

thanq,

Jyothi.

Former Member · ‎2008 Mar 25

HI,

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

transaction which have screen and fields.

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.

Regards,

S.Nehru

Former Member · ‎2008 Mar 25

Hi,

1)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 ( ) and Remove ( ) The BAPI Add adds a

subobject to an existing object inst! ance and the BAPI and

Remove removes a subobject from an object instance. These BAPIs

are instance methods.

2) No 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.

3) Each Bapi Object has Interface, Key Fields, Attributes,Methods and

Events.

Bapi Function Modules can be attached to these Bapi objects .Function module

has a single bound functionality while a BAPI object can contain many

functionalities

rgds,

bharat.

Former Member · ‎2008 Mar 25

BAPI's 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.BAPI is having all Key fields, methods, interfaces etc

rahulkavuri · ‎2008 Mar 25

BAPI stands for Business Application Program Interface &

RFC stands for Remote Function Call

Major difference betwen Bapi and RFC is that BAPIS are use for communication between SAP and Non SAP system whereas RFCs are used for communicating within sap system only..

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

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) .

Former Member · ‎2008 Mar 25

Hi,

BAPI stands for Business Application Programming Interface. It is a library of functions that are released to the public as an interface into an existing SAP system from an external system.

RFC is the protocol used to call functions in an R/3 system by a caller external to R/3 or to call programs external to R/3 from an R/3 system.

Functions can only be called via RFC, if they are tagged as RFC functions in the SAP development workbench. They are then called RFC function modules. BAPIs are complete sets of (BAPI) function modules that model a business application.

When you are familiar with web developments: RFC can be compared to HTTP and BAPIs are CGI applications.

In other words: A BAPI function is a function module that can be called remotely using the RFC technology.

Thanks,

Sriram POnna.

Former Member · ‎2008 Mar 25

Hi Jyothi,,,

1) 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.

2) No 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.

3) Each Bapi Object has Interface, Key Fields, Attributes,Methods and Events.

Bapi Function Modules can be attached to these Bapi objects .Function module has a single bound functionality while a BAPI object can contain many functionalities

4) Transparent table, Pool table and cluster table are data dictionary table objects sorted table, indexed table and hash table are internal tables.

5)Table pools (pools) and table clusters (clusters) are special table types in the ABAP Dictionary. The data from several different tables can be stored together in a table pool or table cluster. Tables assigned to a table pool or table cluster are referred to as pooled tables or cluster tables.

A table in the database in which all records from the pooled tables assigned to the table pool are stored corresponds to a table pool.

The definition of a pool consists essentially of two key fields (Tabname and Varkey) and a long argument field (Vardata).

Table Clusters Several logical data records from different cluster tables can be stored together in one physical

record in a table cluster.

A cluster key consists of a series of freely definable key fields and a field (Pageno) for distinguishing continuation records. A cluster also contains a long field (Vardata) that contains the contents of the data fields of the cluster tables for this key. If the data does not fit into the long field, continuation records are created. Control information on the structure of the data string is still written at the beginning of the Vardata field.

6) Hashed tables

This is the most appropriate type for any table where the main operation is key access. You cannot access a hashed table using its index. The response time for key access remains constant, regardless of the number of table entries. Like database tables, hashed tables always have a unique key. Hashed tables are useful if you want to construct and use an internal table which resembles a database table or for processing large amounts of data.

Sample Prog: This does nothing.

REPORT Z_1 .

tables: mara.

data: i type hashed table of mara with unique key matnr

7) and 😎 ABAP objects are root for your program and reports.

RFC Vs BAPI

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.

RFC is a type of function module use to call the function

module from remote system, where as BAPI is also RFC but

provides higher level of abstraction, that is BAPI is a RFC

with object oriented wrapping around it and is implemented

as a method of business object.

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