Select data from sap tables FBG
Display SAP table details
FBG_EKKO - Follow-On Doc. Generation: PO Header Data Structure
FBG_POSTAB - Worklist for follow-on docs to be generated for alloc tbls
FBG_POSTAB_600 - Append 600
FBG_VBSK - Follow-On Doc. Generation: Delivery Header Data Structure
Return Table index