ORACLE分区索引UNUSABLE导致的DML操作失败举例分析

本篇内容主要讲解"ORACLE分区索引UNUSABLE导致的DML操作失败举例分析"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"ORACLE分区索引UNUSABLE导致的DML操作失败举例分析"吧!

1、创建模拟的分区表

SQL> CREATE TABLE T_NEW (ID int, TIME date,name varchar2(20)) PARTITION BY RANGE (TIME)

(PARTITION P1 VALUES LESS THAN (TO_DATE('2018-1-1', 'YYYY-MM-DD')),

PARTITION P2 VALUES LESS THAN (TO_DATE('2018-2-1', 'YYYY-MM-DD')),

PARTITION P3 VALUES LESS THAN (TO_DATE('2018-3-1', 'YYYY-MM-DD')),

PARTITION P4 VALUES LESS THAN (MAXVALUE)); 2 3 4 5

Table created.

SQL>

2、插入数据测试分区表可用

SQL> insert into t_new values(1,TO_DATE('2018-1-15', 'YYYY-MM-DD'),'hellow');

1 row created.

SQL>

SQL> commit;

Commit complete.

SQL> select * from t_new;

ID TIME NAME

---------- --------- --------------------

1 15-JAN-18 hellow

SQL>

3、创建业务变更的不可见不可用分区索引

SQL> create unique index IDX1 on t_new (id, time) local invisible nologging unusable;

Index created.

SQL>

4、执行INSERT插入失败，提示:ORA-01502分区索引状态为不可用

SQL> insert into t_new values(1,TO_DATE('2018-3-15', 'YYYY-MM-DD'),'yellow');

insert into t_new values(1,TO_DATE('2018-3-15', 'YYYY-MM-DD'),'yellow')

*

ERROR at line 1:

ORA-01502: index 'TEST.IDX1' or partition of such index is in unusable state

SQL>

5、重新创建索引去掉UNUSABLE关键字

SQL> drop index idx1;

Index dropped.

SQL> create unique index IDX1 on t_new (id, time) local invisible nologging ;

Index created.

SQL>

6、模拟INSERT插入不受影响

SQL> insert into t_new values(1,TO_DATE('2018-3-15', 'YYYY-MM-DD'),'yellow');

1 row created.

SQL>

到此，相信大家对"ORACLE分区索引UNUSABLE导致的DML操作失败举例分析"有了更深的了解，不妨来实际操作一番吧！这里是网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！