ORA_DICT_OBJ_OWNER_LIST returns the number of elements in the list indexed by a PLS_INTEGER datatype.
SQL> SQL> DECLARE 2 owner_list DBMS_STANDARD.ORA_NAME_LIST_T; 3 counter PLS_INTEGER; 4 BEGIN 5 IF ora_sysevent = 'ASSOCIATE_STATISTICS' THEN 6 counter := ora_dict_obj_owner_list(owner_list); 7 dbms_output.put_line('counter:'||counter); 8 END IF; 9 END; 10 / PL/SQL procedure successfully completed. SQL> SQL> SQL>