differnece between bapi and function module

[kishorepallapothula]

Hi SAP gurus,

Please tell me the difference between function module and bapi. will be rewarded for the answer.

kishore

[Former Member]

Hi Kishore,

BAPI are the subclass of the Function Module.

All BAPI's are nothing but the function modules. but they mostly used for mass data upload or in the ALE for passing data betweeen different systems.

Regards,

Atish

[Former Member]

Atish,

Just for your own knowledge...

BAPI are the subclass of the Function Module.

<b>Not true</b> - BAPIs are tied to the BOR (Business Object Repository). FMs are not bound to Bus Objs.

All BAPI's are nothing but the function modules.

<b>Not true</b> - BAPIs are REMOTE-ENABLED func mods, which are very different from Func Mods.

[Former Member]

To be clear, SAP developed BAPIs for external systems. They can and should be used with ABAP coding.

But SAP's intention is to allow external programmers (C coders, VB coders, etc) to use SAP business logic THRU this technology.

[Former Member]

Hi John,

Yes I know these things, but when you see technically they are nothing but the FM.

Anyways thanks for updating on this.

Regards,

Atish

[RichHeilman]

BAPIs are remote enabled function modules, but usually implement some business object. Meaning that a BAPI would do all of the required transactions, data processing associated with the business object, like creating a purchase order. There are a lot of connections which are made when you create purchase order, and all are taken care of by the BAPI. So when you call the BAPI and pass the required parameters, it would be like you have created the PO using the standard transaction(ME21N) but there is no screen processing. Also, BAPIs are well documented in the transaction BAPIs. Just remember that at a technical level, BAPIs are nothing more than an RFC enabled function module.

Regards,

Rich Heilman

[former_member189059]

The BAPIs in the R/3 System are currently implemented as <b>function modules</b>, all of which are held in the Function Builder. Each function module underlying a BAPI.

1. Supports the Remote Function Call (RFC) protocol

2. Has been assigned as a method to an SAP Business Object in the BOR

3. Is processes without returning any screen dialogs to the calling application

[Former Member]

HI Kishore,

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

<b>Regards,

Jackie.</b>