alter index index_name visible; 相关参数optimizer_use_invisible_indexes此参数可以控制优化器生成执行计划时,是否考虑使用invisible index. 参数值为bool类型,当设置为true时,CBO会考虑使用invisible index. 默认为false. 此参数可以在会话或者系统全局或者实例级别进行设置。 SQL> select isses_modifiable,issys_modifia...
遇到的场景:Oracle数据库的分区表出现UNUSABLE INDEX,下述文档用于解决相关问题。 Symptoms Description of which operations mark index partitions as INDEX UNUSABLE. 描述那些操作使得索引不可用 Cause There are six types of maintenance operations and adding a partition to a Hash-Partitioned Table that mark ind...
1. enable index alter index index_name enable; 2. disable index alter index index_name disable; 两者的区别是:enable和disable仅仅只针对函数索引。 ORACLE官方文档提供的说法是: ENABLE Clause Enable applies only to a function-based index that has been disabled because a user-defined function used by...
SKIP_UNUSABLE_INDEXES enables or disables the use and reporting of tables with unusable indexes or index partitions.
Oracle index unusable和invisible的区别 unusable index 是被优化器所忽略，并且不被dml操作维护，如果索引被unusable后，需要重建。invisible index会被优化器所忽略，但是dml操作仍然会维护索引。在session或者system级别使用参数OPTIMIZER_USE_INVISIBLE_INDEXES=true，那么优化器会考虑使用invisible index。适用于...
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!这里是亿速云网站,更多相关内容可以...
在某些大规模的数据迁移中,为了缩短迁移的时间,在源数据已满足约束条件的情况下,载入数据时为了避免多余的约束校验及创建index entry,缩短迁移时间,往往需要禁用约束和索引。对于索引的禁用如何实现呢?对于普通的B*Tree索引,可以将其状态置为unusable状态,是索引不可用,当索引不可用时,其表对dml语句的可用性还和参数sk...
create index idx_test_c3 on t_idx_offline_test(c3) tablespace dasong_idx3 local; insert into t_idx_offline_test select rownum, rownum+1, rownum+2 from dual connect by rownum<10000; commit; 3.offline数据文件 alter database datafile '/oradata/oracle/dasong_idx2.dbf' offline for drop; ...
Oracle iProcurement - Version 12.1.3 and later: ORA-29861: Domain Index Is Marked LOADING/FAILED/UNUSABLE Index: ICX_CAT_ITEMSCTXDESC_HDRS
Depending on the error, either rebuild the index, or drop and re-create it. Related Oracle Error ORA-26023: index string.string partition string was made unusable due to: In "Oracle" Oracle Error ORA-26030: index string.string had string partitions made unusable due to: ...