Select data from sap tables RKAB
Display SAP table details
RKAB1 - Dynpro fields for function modules
RKAB1_FELD - Help structure for POPUP_SEEK_IN_TABLE (only 1 field)
RKAB1_VAR - Function group: KAB1 fields for search window
RKABSCH - Allocations: Cost Component Structure
Return Table index