Empties a ProDataSet object of all records
in its associated temp-tables. 
      
        Return type: LOGICAL
      
        Applies
to:
        ProDataSet object handle
      
     
    Syntax
      
      
      When you invoke this method, the ABL Virtual
Machine (AVM) sets the ORIGIN-HANDLE attribute on any changes temp-tables
corresponding to the source temp-tables of this ProDataSet to the Unknown value (?).