解决ora-02429:无法用于删除强制唯一/主键的索引

Normal 0 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE1.1    描述
操作系统：REDHAT 5.5

数据库版本：11.2.0.3+asm+rac

问题描述：使用drop index historysettlement.PK_TEST 删除一索引时,出现ora-02429: 无法用于删除强制唯一/主键的索引错误.

SQL> drop index historysettlement.pk_test;
drop index historysettlement.pk_test
                             *
ERROR at line 1:
ORA-02429: cannot drop index used for enforcement of unique/primary key
 
 
SQL>

1.1.1        检查索引信息

SQL> select t.table_name, t.index_type,t.uniqueness,t.status from dba_indexes t
  2  where t.index_name='PK_TEST'
  3  and t.owner='HISTORYSETTLEMENT';
 
TABLE_NAME                     INDEX_TYPE                  UNIQUENES STATUS
------------------------------ --------------------------- --------- --------
TEST                           NORMAL                      UNIQUE    VALID
 
SQL>

1.1.2        原因

// *Cause: user attempted to drop an index that is being used as the

//         enforcement mechanism for unique or primary key.

用户在使用drop命令删除主键或者唯一键索引时,会出现此错误.

1.1.3        解决方法

使用alter table tablename drop constraint cons_name 命令来代替drop index 命令.

SQL> alter table historysettlement.test drop constraint pk_test;
 
Table altered.
 
SQL>