对两表结合查询建立MVIEW，进行MVIEW的的高速刷新失败，如何处理？
例如：
SQL> drop user u1 cascade;
User dropped.
SQL> grant dba to u1 identified by u1;
Grant succeeded.
SQL> conn u1/u1
Connected.
SQL> create table TAB001 (col1 integer primary key, col2 integer, val3 integer);
Table created.
SQL> create materialized view log on tab001;
Materialized view log created.
SQL> create table TAB002 (col1 integer primary key, col2 integer, val3 integer);
Table created.
SQL>
SQL> create materialized view log on tab002;
SQL> create materialized view mv001
as
SELECT t1.col1 as t1c0l1, t1.col2 as t1col2, t2.col1 as t2col1, t2.col2 as t2col2 , t1.val3 as t1val3,t2.val3 as t2val3
FROM TAB001 t1 LEFT OUTER JOIN TAB001 t2
ON t1.col2 = t2.col2;
Materialized view created.
SQL> exec dbms_mview.refresh('MV001','F');
BEGIN dbms_mview.refresh('MV001','F'); END;
*
ERROR at line 1:
ORA-12004: REFRESH FAST cannot be used for materialized view "U1"."MV001"
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2809
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 3025
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2994
ORA-06512: at line 1
SQL>
此时，可以考虑换用 ROWID 类型的 MVIEW LOG，重新来执行一次：
create table TAB001 (col1 integer primary key, col2 integer, val3 integer);
alter table tab001 add constraint con_t1_col2 unique(col2);
CREATE MATERIALIZED VIEW LOG ON tab001 WITH ROWID;
create table TAB002 (col1 integer primary key, col2 integer, val3 integer);
CREATE MATERIALIZED VIEW LOG ON tab002 WITH ROWID;
CREATE MATERIALIZED VIEW MV055
BUILD IMMEDIATE
REFRESH FAST
AS select /*+ use_hash(a,b) */
a.rowid aid, b.rowid bid, a.col1, b.val3
from tab001 a, tab002 b
where a.col2 = b.col2(+);
exec dbms_mview.refresh('MV055','F');
SQL> exec dbms_mview.refresh('MV055','F');
PL/SQL procedure successfully completed.
SQL>
可以看到，已经成功。