Oracle 19C reverse反向索引测试

一、重建的方式改造反向索引

1、创建普通主键索引

create table MS_BN.test as select * from MS_SC.QT_CHA_LIST where rownum

select * from MS_BN.test；

alter table MS_BN.TEST

add constraint PK_testid primary key (list_id)

using index;

drop table MS_BN.test purge;

select * from dba_indexes where table_owner='MS_BN' and table_name='TEST'

2、创建反向主键索引

create table MS_BN.test as select * from MS_SC.QT_CHA_LIST where rownum

create unique index MS_BN.idx_listid on MS_BN.test (list_id) reverse;

alter table MS_BN.TEST

add constraint PK_testid primary key (list_id)

using index ;

二、直接改造

alter index MS_BN.PK_testid rebuild reverse;

三、分区表测试

如下图，分区表，local字段的不支持反向索引

全局索引，则没有问题.