Oracle数据库应用程序中RAID的级别

并且为repair table和orphan key tables提供管理功能

SQL> @adminCreate

SQL> connect sys/

Connected.

SQL>

SQL> -- Repair Table

SQL>

SQL> declare

2 begin

3 -- create repair table

4 dbms_repair.admin_tables (

5 -- table_name => 'REPAIR_TABLE',

6 table_type => dbms_repair.repair_table,

7 action => dbms_repair.create_action,

8 tablespace => 'USERS'); -- 如果是使用SYS用户的缺省表空间，该项就不用指定

9 end;

10 /

PL/SQL procedure successfully completed.

我们查询dba_objects，可以看到如下结果：

SQL> select owner, object_name, object_type

2 from dba_objects

3 where object_name like '%REPAIR_TABLE';

OWNER OBJECT_NAME OBJECT_TYPE

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

SYS DBA_REPAIR_TABLE VIEW

SYS REPAIR_TABLE TABLE

SQL>

SQL> -- Orphan Key Table

SQL>

SQL> declare

2 begin

3 -- Create orphan key table

4 dbms_repair.admin_tables (

5 table_type => dbms_repair.orphan_table,

6 action => dbms_repair.create_action,

7 tablespace => 'USERS'); -- 如果是使用SYS用户的缺省表空间，该项就不用指定

8 end;

9 /

PL/SQL procedure successfully completed.

我们查询dba_objects，可以看到如下结果：

SQL> select owner, object_name, object_type

2 from dba_objects

3 where object_name like '%ORPHAN_KEY_TABLE';

OWNER OBJECT_NAME OBJECT_TYPE

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

SYS DBA_ORPHAN_KEY_TABLE VIEW

SYS ORPHAN_KEY_TABLE TABLE

二、使用DBMS_REPAIR.CHECK_OBJECT进行检测

CHECK_OBJECT procedure检查指定的object，并且将关于损坏和修补的指导信息装入Repair Table。它将效验指定object中所有块的一致性。而在此之前已标识的块就会被跳过。

SQL> @checkObject

SQL> set serveroutput on

SQL>

SQL> declare

2 rpr_count int;

3 begin

4 rpr_count := 0;

5 dbms_repair.check_object (

6 schema_name => 'SYSTEM',

7 object_name => 'T1',

8 repair_table_name => 'REPAIR_TABLE',

9 corrupt_count => rpr_count);

10 dbms_output.put_line('repair count: ' || to_char(rpr_count));

11 end;

12 /

repair count: 1

PL/SQL procedure successfully completed.

repair_table的结构如下：

SQL> desc repair_table

Name Null? Type

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

OBJECT_ID NOT NULL NUMBER

TABLESPACE_ID NOT NULL NUMBER

RELATIVE_FILE_ID NOT NULL NUMBER

BLOCK_ID NOT NULL NUMBER

CORRUPT_TYPE NOT NULL NUMBER

SCHEMA_NAME NOT NULL VARCHAR2(30)

OBJECT_NAME NOT NULL VARCHAR2(30)

BASEOBJECT_NAME VARCHAR2(30)

PARTITION_NAME VARCHAR2(30)

CORRUPT_DESCRIPTION VARCHAR2(2000)

REPAIR_DESCRIPTION VARCHAR2(200)

MARKED_CORRUPT NOT NULL VARCHAR2(10)

CHECK_TIMESTAMP NOT NULL DATE

FIX_TIMESTAMP DATE

REFORMAT_TIMESTAMP DATE

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