dataSet.afterOpen();
		protected IResultIterator executeOdiQuery( ) 				throws DataException		{			assert parentIterator != null;			dataSet.afterOpen();			ICandidateQuery cdQuery = (ICandidateQuery) odiQuery; 			cdQuery.setCandidates( parentIterator, groupLevel );			IResultIterator ret = cdQuery.execute();			parentIterator = null;						return ret;		}