BADI in Billing Transaction (VF01)

Question

Dear All,
I am new to BADIs Development. And I want to put a BADI in Billing Transaction VF01. My users want some extra fields for putting the data. So please guide me how can I do that.
Regards,
Vishal

Answer 1

Hi vishal
if u specify exact fields and requirements , i think more forum memebers can guide u.
take help of technical consultant for finding out exact BADI  in applicable abap code u can use t.code SE17 and Se18 for the same.
a generic info for you is from sap help check this if it helps
Enhancement of Tables of Billing Document  
Use
For all components of the billing document there are customer includes that you can use to add your own fields without the need for modifications.
Features
All layers use the same customer includes. This means that, for example, when you include a field in the customer include of the document header, this field exists in the database layer, the logical layer, and the display layer. You cannot enhance the structures of the inbound interface of BAPI_ISTBILLDOC_CREATEMULTIPLE using customer includes. In accordance with the guidelines for programming BAPIs, you have to use the import table EXTENSIONIN to fill the fields in the customer include of the billing document.
For technical reasons, there are two customer includes in the components of the billing document. One customer include is designed for fields of a character nature that can be transferred automatically. The transfer is supported by predefined BAPI table enhancements. If you use this predefined BAPI table enhancement when you fill table EXTENSIONIN, the fields in the customer include are provided with data automatically. You do not need a BAdI implementation. For more information, see the section  Customer Enhancement and Modification of BAPIs (CA-BFA) in the documentation for SAP NetWeaver under Cross-Services ® Further Development, Modifications, u2026 (CA-BFA).
The predefined BAPI table enhancements also include the above-mentioned customer includes. The following table shows the names of the BAPI table enhancements and customer includes:
Part     BAPI Table Enhancement     Customer Include
Header     BAPI_TE_FKKINVBILL_H     CI_FKKINVBILL_H
Items     BAPI_TE_FKKINVBILL_I     CI_FKKINVBILL_I
Tax Items     BAPI_TE_FKKINVBILL_T     CI_FKKINVBILL_T
Additional Items     BAPI_TE_FKKINVBILL_A     CI_FKKINVBILL_A
A further customer include is designed for customer-defined fields that are not of a character nature or required for mapping. An example is additional currency fields. For these fields you have to implement a method of the BAdI ISTINV_BAPIBILL. The following table shows the names of the customer includes and the related methods that you have to implement for the transfer of the data:
Part     BAdI Method     Customer Include
Header     MAP_HEADER     CI_M_FKKINVBILL_H
Items     MAP_ITEM     CI_M_FKKINVBILL_I          
Tax Items     MAP_TAXITEM     CI_M_FKKINVBILL_T          
Additional Items     MAP_ADDITEM     CI_M_FKKINVBILL_A
The following figure shows how you can use the EXTENSION table to fill customer-defined fields:
       1.      The standard SAP fields are provided with data automatically. This means, for example, that the values of the structure HEADERS are transferred to the standard fields of the structure FKKINVBILL_H. Usually no BAdI implementation is required.
       2.      Use the customer include CI_FKKINVBILL_H for customer-defined character fields whose value is to be transferred from the interface to the billing document header unchanged. This include is also included in the BAPI table enhancement BAPI_TE_FKKINVBILL_H. Entries in table EXTENSIONIN that refer to this structure are processed automatically. A BAdI implementation is not required. However, we recommend BAdI implementation for checking. In the same way, you can add character fields to other parts of the billing document and provide them with data.
       3.      If you want to add a numerical field to the billing document header, you have to use the customer include CI_M_FKKINVBILL_H. Also define a BAPI table enhancement. We recommend that you only use character fields in the BAPI table enhancement. Implement method MAP_HEADER of the BAdI ISTINV_BILL. Use your BAPI table enhancement to identify the corresponding entries in table EXTENSIONIN in the method. Convert the character field from your BAPI table enhancement into the numerical field from the customer include CI_M_FKKINVBILL_H. In the same way, you can add numerical fields to other parts of the billing document and provide them with data.
       4.      You can also use the EXTENSIONIN table to provide a customer-defined table with values.
Regards
Mandar