Danke.
Bin jetzt auch über folgendes gestolpert:
"TUniQuery and TUniTable do not have the IndexName property, because modern DBMSs automatically use server indexes when executing an
SQL statement on the server side. The IndexFieldNames property is used for getting or setting up the list of fields, which a set of records is sorted by on the client side. Also, sorting a dataset by setting the IndexFieldNames property increases performance of records search in a dataset. "