How to find badi and utilities of BADI

Hi,

I would like to share my knowledge on BADI. Recently we done restriction on Po by using BADI.  In a custom development there was a requirement to restrict on PO creation to compare with certain parameters.

Requirement :

• document type and Purchasing Org  parameters need control on field PR mandatory. Not for  only PR mandatory some other requirement like control on qty comparing with document suppose by using ZPPN document type qty should not exceed by 10 on each line item like. 
  

In PO some of restrictions it is possible through configuration but some of the requirements we need to go by custom development 

Use of BADI

In standard lot of BADI’s available, these are helpful to achieve the requirements. For example i am using  BADI for above requirement ME_PROCESS_PO_CUST.

You can go in se19 enter your BADI details you can check interfaces and classes in BADI. Check in interface tab there are lot of classes helpful to control on part in PO.

See below classes

INITIALIZE                                           Initializations (Invoked Once Only)

OPEN                                                  Open a Purchase Order

PROCESS_HEADER                          Processing of Header Data

PROCESS_ITEM                                Processing of Item Data

PROCESS_SCHEDULE                     Processing of Delivery Schedule Line Data

PROCESS_ACCOUNT                       Processing of Account Assignment Data

CHECK                                                Closing Check

POST                                                   Post

Here we have option, where you want control on PO. If suppose you want control on item level you can with Process_ Item.

If you want control on header level you can use PROCESS_HEADER, at schedule line tab  then use PROCESS_SCHEDULE, at Item level the PROCESS_ITEM. IF you want control on check level then use CHECK.

By using this BADI you can control on ME21N and ME22N

Conclusion:  This BADI not only for this requirement you can do any new requirement related to Po field control by using different Parameters.

See below examples:

1. Suppose client requirement is For document  type NB, Purchasing accepted only 1001
2. If suppose for document type ZNB, tax code should be VN.
3. Validation with PR line item with PO schedule line items
4. And also you can users with different parameters. Etc….

Key points:

Mepoitem   for item details updating in me21n

Mepoheader for header details updating in me21n

Meposchedule for schedule delivery details updating me21n

In standard there are lot of BADI’s helpful to achieve the client requirement.For Example:

ME_PROCESS_`PO

ME_PROCESS_PO _CUST

ME_PROCESS_REQ

ME_PROCESS_REQ_CUST

ME_PURCHDOC_POSTED

How to find BADI for transaction code

For example ME21N

Go to Menu bar system  —-  status — Program,

Double click on; it will go inside the program

Again go to Menu bar GOTO —- attributes — Development class/Package .

Go to SE80  — give your package

It will display available components in it along with enhancement

Check in enhancement , here you can find related BADI’s.