Oracle11g下ORA-01417的解决办法

Oracle11g下ORA-01417的解决办法

今天有兄弟反馈，有一条SQL在12C上没有问题，在11g上就报错，报错内容是ORA-01417: 表可以外部连接到至多一个其他的表。分析了下SQL，抽象为下列的例子。

在12c下没有问题：

SQL> select * from v$version;

BANNER CON_ID
-------------------------------------------------------------------------------- ----------
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production 0
PL/SQL Release 12.1.0.1.0 - Production 0
CORE 12.1.0.1.0 Production 0
TNS for Linux: Version 12.1.0.1.0 - Production 0
NLSRTL Version 12.1.0.1.0 - Production 0
drop table test1 purge;
drop table test2 purge;
drop table test3 purge;
create table test1 (id number primary key);
create table test2 (id number);
create table test3 (dept_id number,measure_id number);
insert into test1 values(1);
insert into test1 values(2);
insert into test1 values(3);
insert into test2 values(10);
insert into test2 values(20);
insert into test3 values(1,10);
commit;

SQL> select *
from test1, test2, test3
where test1.id = test3.dept_id(+)
and test2.id = test3.measure_id(+);
ID ID DEPT_ID MEASURE_ID
---------- ---------- ---------- ----------
1 10 1 10
2 10
2 20
3 20
1 20
3 10

在11g下有问题：

SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> select *
from test1, test2, test3
where test1.id = test3.dept_id(+)
and test2.id = test3.measure_id(+);
where test1.id = test3.dept_id(+)
*

--把test1和test2联合起来，再与test3关联，问题解决

SQL> select *
from (select test1.id dept_id, test2.id measure_id from test1, test2) a,
test3
where a.dept_id = test3.dept_id(+)
and a.measure_id = test3.measure_id(+);