有人可以告诉我为什么会出现以下行为(Oracle 10.2):
SQL> create table part_test (
i int primary key,
d date
)
partition by range (d) (partition part_test_1 values less than (to_date(' 2 3 4 5 1980-01-01', 'yyyy-mm-dd')));
create public synonym part_test for part_test;
select object_name, object_type, status from all_objects where object_name = 'PART_TEST';
alter table part_test add partition part_test_2 values less than (to_date('1981-01-01', 'yyyy-mm-dd'));
select object_name, object_type, status from all_objects where object_name = 'PART_TEST';
alter table part_test drop partition part_test_1;
select object_name, object_type, status from all_objects where object_name = 'PART_TEST';
drop public synonym part_test;
drop table part_test;
Table created.
SQL> SQL>
Synonym created.
SQL> SQL>
OBJECT_NAME OBJECT_TYPE STATUS
------------------------------ ------------------- -------
PART_TEST TABLE VALID
PART_TEST TABLE PARTITION VALID
PART_TEST SYNONYM VALID
SQL> SQL>
Table altered.
SQL> SQL>
OBJECT_NAME OBJECT_TYPE STATUS
------------------------------ ------------------- -------
PART_TEST TABLE VALID
PART_TEST TABLE PARTITION VALID
PART_TEST TABLE PARTITION VALID
PART_TEST SYNONYM VALID
SQL> SQL>
Table altered.
SQL> SQL>
OBJECT_NAME OBJECT_TYPE STATUS
------------------------------ ------------------- -------
PART_TEST TABLE VALID
PART_TEST TABLE PARTITION VALID
PART_TEST SYNONYM INVALID
SQL> SQL>
Synonym dropped.
SQL>
Table dropped.
SQL>
删除分区后同义词变得无效,我无法理解原因。
感谢您的任何想法。
答案 0 :(得分:6)
我已经使用Oracle 10.2对其进行了测试,同义词确实无效,但是当其他用户通过执行同义词时
从part_test中选择count(*);
Oracle自动编译同义词,同义词变为有效。
包,程序和功能都是一样的。当您执行它们并且它们无效时,Oracle将尝试自动编译它们。
答案 1 :(得分:2)
它不在11.1.0.6中 它可能是一个被修复的错误。它可能是必要的(例如,基于同义词重新验证视图......)但是已经使用了改进的技术。