Who can give me a solution about the following requirment?

Question

Dear All,
The requirment is very hard for me, Perhaps you can give me a detail solution about it. I will list my confusion....thank you very much.
(1)
On the SRM puchase order the payment terms (BBP_PDHGP-PMNTTRMS) shall be defaulted to the supplier’s payment term.
Where I can find BBP_PDHGP-PMNTTRMS?
(2)
Create an implementation of the BADI definition BBP_DOC_CHANGE_BADI and name it ZQF_PO_FLDS_DEFAULT.  This implementation will have a filter type BUS2201 for purchase order processing.
done
(3)
The vendor (business partner) for a purchase order can be found in importing table parameter it_partner.  Read the table where the field  partner_fct = 00000019  (i.e. vendor).  The field PARTNER_NO contains the data for the next step.
the table? which table? I don't know. I can't find this table.
I check BBP_PO_CHANGE, It_partner is a Parameter only, How to find the table on requirment mentioned?
(4)
Use standard SAP function module BBP_PARTNER_GET_PURCH_DATA_NEW to return the purchasing information for the vendor.  Pass in the following parameter to this function:
     PARTNER_GUID = IT_PARTNER-PARTNER_NO (from previous step)
The terms for this vendor can be found in field PAYMENT_TERMS of return parameter ET_PURCH_ORG_SET.
Change field PMNTTRMS in exporting stucture ES_HEADER to the value returned from previous step (ET_PURCH_ORG_SET- PAYMENT_TERMS)
(5)If no payment terms can be round for a vendor, issue an error message as detailed in the component requirement section above. (see existing shopping cart code for technical details on issuing error messages)

Answer 1

Hi
Here are the suggestions.
<b>Every information is available in BBP_DOC_CHANGE_BADI in SE18. Create an implementation of the same in SE19 transaction.</b>
Move the changed data in the Shopping cart, back to your internal tables, like et_item, et_partner , et_orgdata... etc.. inside the BADI Implemenataion.
  et_item[]     = it_item[].
  et_partner[] = it_partner[].
  et_orgdata[] = it_orgdata[].
<b>1) Inside BBP_DOC_CHANGE_BADI, the payment terms will also be present in et_item [] table. Populate the required payment terms from reading the same based on the vendor number into every line item.</b>
<b>3) et_partner [ ] table in BBP_DOC_CHANGE_BADI holds the partner details, like paetner number, partner function, partner type, once the Shopping cart is filled with atleast one line item in the et_item[] table.</b>
4) et_orgdata[] can be changed accordingly.
<b>5) for issuing Error message, create an implementation of BBP_DOC_CHECK_BADI and use the message as per your requirements.</b>
Hope this will help.
Please reward suitable points.
Regards
- Atul