During the production run of the SAP system, additional
fields might have been added and you might have lost tracks of the SAP tables
changes.
Transaction code SPDD
have been created to help you to find all the SAP tables that have been
modified.
Other ABAP Dictionary objects such as lock objects,
matchcodes, and views, for which modification would not result in data loss, are
not processed during the upgrade with transaction
SPDD, but only after the
upgrade is complete with transaction SPAU.
