Oracle o7_DICTIONARY_ACCESSIBILITY参数-优快云博客

本文详细介绍了Oracle数据库中的o7_DICTIONARY_ACCESSIBILITY参数的作用及其对不同用户权限的影响，并通过实例展示了如何设置该参数来控制用户对数据库字典视图的访问。

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环境：

sys@EMREP> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

缺省值

sys@EMREP> show parameter o7_

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
O7_DICTIONARY_ACCESSIBILITY          boolean     FALSE

参数解释

参数名： o7_DICTIONARY_ACCESSIBILITY
类别：安全性和审计
说明 : 主要用于从Oracle7移植到Oracle8i.
如果该值为TRUE,SYSTEM权限(如SELECT ANY TABLE)将不限制对SYS方案中各对象的访问(Oracle7行为)
如果该值为FALSE,只有被授予了SELECT_CATALOG_ROLE,EXECUTE_CATALOG_ROLE

或DELETE_CATALOG_ROLE权限的用户才能访问SYS方案中的各对象
值范围: TRUE | FALSE
位置： $ORACLE_HOME/dbs/initSID.ora里面设置

两个错误

① ORA-28009

o7_DICTIONARY_ ACCESSIBILITY参数的默认设置为FALSE,所以使用SYS用户连接数据库时必须作为SYSDBA或SYSOPER身份。
如果将o7_DICTIONARY_ACCESSIBILITY参数设置为TRUE，该错误将不会产生

sys@EMREP> conn sys/oracle
ERROR:
ORA-28009: connection as SYS should be as SYSDBA or SYSOPER


sys@EMREP> conn / as sysdba
Connected.
sys@EMREP> alter system set O7_DICTIONARY_ACCESSIBILITY=true scope=spfile;

System altered.

sys@EMREP> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
sys@EMREP> startup
ORACLE instance started.

Total System Global Area  524288000 bytes
Fixed Size                  1220384 bytes
Variable Size             155189472 bytes
Database Buffers          364904448 bytes
Redo Buffers                2973696 bytes
Database mounted.
Database opened.
sys@EMREP> conn sys/oracle
Connected.

② ORA-00942

当用户没有select any table的时候

sys@EMREP> create user u1 identified by u1;

User created.

sys@EMREP> grant connect,resource to u1;

Grant succeeded.

sys@EMREP> conn u1/u1
Connected.
u1@EMREP> show parameter dictionary
ORA-00942: table or view does not exist

sys@EMREP> grant select any table to u1;

Grant succeeded.

sys@EMREP> conn u1/u1
Connected.
u1@EMREP> show parameter dictionary

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
O7_DICTIONARY_ACCESSIBILITY          boolean     TRUE