Oracle 重建dual表

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如果dual表被误删除，或者损坏，重启oracle就会看到如下错误：
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00942: table or view does not exist

这里我就不在去重现整个过程了，简单写下重建的方法mark。

step1：编辑参数文件加入如下参数
create pfile='/home/oracle/pfile.ora' from spfile
replication_dependency_tracking = FALSE
参数的作用时oracle启动过程中跳过dual表的错误，从而打开数据库。

step2:启动数据库
startup

step3:创建dual表
CREATE TABLE "SYS"."DUAL"
(
"DUMMY" VARCHAR2(1)
)
PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(
INITIAL 16384 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT
)
TABLESPACE "SYSTEM"

Insert Into Dual Values ('X');
Commit;
step4:授权
grant select on sys.dual to public with grant option;
select count(*) from dual;


step5:重启数据库
shutdown immediate
create spfile from pfile='/home/oracle/pfile.ora'
startup

step6:检查
column OWNER format a15;
column OBJECT_NAME format a20;
select OWNER,OBJECT_NAME,OBJECT_TYPE,CREATED from dba_objects where object_name='DUAL';
step：测试验证
conn test/test
select sysdate from dual;

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