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如何从BasicFile迁移到SecureFile存储(一)

Oracle 11g新的SecureFile存储特性扩展了大对象(LOB)的灵活性和容量,本文研究如何有效地从BasicFile迁移到SecureFile存储,如何测量SecureFile vs BasicFile LOB的效率,以及如何为SecureFile LOB使用不同的压缩和重复数据删除选项。

  我创建了一个新表TRBTKT.SECURE_TICKETS重新定义了原始表TRBTKT.TICKETS的结构,将原始的BasicFile LOB映射到对应的SecureFile LOB,然后执行了一条INSERT INTO … SELECT FROM DML语句将原始表中的内容传输到新表中。

  在一个相对简单的应用程序环境中,这种载入方式足以应付,但目前在数据仓库和商业智能应用程序中广泛地使用了LOB,特别是存储那些包含了复杂商务交易的XML文档和医院信息系统捕获到的医疗影像数据。

  为了便于说明,我使用清单1中的代码重新创建了这两个表,我使用了列表分区对这两个表进行了分区,在清单2中,我使用更大的数据重新载入TRBTKT.TICKETS表。

  清单1 使用列表分区重新创建这两个表以模拟数据仓库环境

-- 重新创建表TRBTKT.TICKETS,这次包括了一个STATUS列
CREATE TABLE trbtkt.tickets (
     tkt_id         
NUMBER
    ,description    
VARCHAR2(30)
    ,submit_dtm     
TIMESTAMP
    ,status         
VARCHAR2(8)
    ,document       BLOB
    ,scrnimg        BLOB
)
    LOB(document)   
        STORE 
AS BASICFILE (TABLESPACE basicfiles)
   ,LOB(scrnimg)    
        STORE 
AS BASICFILE (TABLESPACE basicfiles)
    PARTITION 
BY LIST (status) (
        PARTITION sts_open 
            
VALUES (OPEN)
       ,PARTITION sts_pending
            
VALUES (PENDING)
       ,PARTITION sts_closed
            
VALUES (CLOSED)
       ,PARTITION sts_other
            
VALUES (DEFAULT)
    )
;

--注释
COMMENT ON TABLE trbtkt.tickets
    
IS Contains Trouble Ticket transaction data;
COMMENT 
ON COLUMN trbtkt.tickets.tkt_id
    
IS Unique identifier for a Trouble Ticket;
COMMENT 
ON COLUMN trbtkt.tickets.description
    
IS Trouble Ticket Description;
COMMENT 
ON COLUMN trbtkt.tickets.submit_dtm
    
IS Trouble Ticket Submission Time Stamp;
COMMENT 
ON COLUMN trbtkt.tickets.status
    
IS Trouble Ticket Status;
COMMENT 
ON COLUMN trbtkt.tickets.document
    
IS Large Object (LOB) that contains a Microsoft Word document that provides detailed information about a Trouble Ticket;
COMMENT 
ON COLUMN trbtkt.tickets.scrnimg
    
IS Large Object (LOB) that contains a screen print or other image that helps a problem solver identify how to act on a Trouble Ticket;

-- 创建索引和约束
CREATE UNIQUE INDEX trbtkt.tickets_pk_idx
    
ON trbtkt.tickets(tkt_id)
    TABLESPACE users;

ALTER TABLE trbtkt.tickets
    
ADD CONSTRAINT tickets_pk
    
PRIMARY KEY (tkt_id);

-----
--
 创建表TRBTKT.SECURE_TICKETS的一个改良版本,使用分区划分SecureFile LOB的存储,基于STATUS 的值设置合适的保留周期
DROP TABLE trbtkt.secure_tickets PURGE;
CREATE TABLE trbtkt.secure_tickets (
     tkt_id         
NUMBER
    ,description    
VARCHAR2(30)
    ,submit_dtm     
TIMESTAMP
    ,status         
VARCHAR2(8)
    ,document       BLOB
    ,scrnimg        BLOB
)
    LOB(document)   
        STORE 
AS SECUREFILE (
            TABLESPACE securefiles
            DISABLE STORAGE 
IN ROW
            CACHE
        )
   ,LOB(scrnimg)    
        STORE 
AS SECUREFILE (
            TABLESPACE securefiles
            DISABLE STORAGE 
IN ROW
            CACHE READS
        )
    PARTITION 
BY LIST (status) (
        PARTITION sts_open 
            
VALUES (OPEN)
                LOB (document) STORE 
AS SECUREFILE (KEEP_DUPLICATES NOCOMPRESS)
               ,LOB (scrnimg)  STORE 
AS SECUREFILE (KEEP_DUPLICATES COMPRESS)
       ,PARTITION sts_pending
            
VALUES (PENDING)
                LOB (document) STORE 
AS SECUREFILE (KEEP_DUPLICATES NOCOMPRESS)
               ,LOB (scrnimg)  STORE 
AS SECUREFILE (DEDUPLICATE COMPRESS)
       ,PARTITION sts_closed
            
VALUES (CLOSED)
                LOB (document) STORE 
AS SECUREFILE (DEDUPLICATE COMPRESS)
               ,LOB (scrnimg)  STORE 
AS SECUREFILE (DEDUPLICATE COMPRESS HIGH)
       ,PARTITION sts_other
            
VALUES (DEFAULT)
                LOB (document) STORE 
AS SECUREFILE (DEDUPLICATE COMPRESS HIGH)
               ,LOB (scrnimg)  STORE 
AS SECUREFILE (DEDUPLICATE COMPRESS HIGH)
    )
;

--注释
COMMENT ON TABLE trbtkt.secure_tickets
    
IS Contains Trouble Ticket transaction data;
COMMENT 
ON COLUMN trbtkt.secure_tickets.tkt_id
    
IS Unique identifier for a Trouble Ticket;
COMMENT 
ON COLUMN trbtkt.secure_tickets.description
    
IS Trouble Ticket Description;
COMMENT 
ON COLUMN trbtkt.secure_tickets.submit_dtm
    
IS Trouble Ticket Submission Time Stamp;
COMMENT 
ON COLUMN trbtkt.secure_tickets.status
    
IS Trouble Ticket Status;
COMMENT 
ON COLUMN trbtkt.secure_tickets.document
    
IS Large Object (LOB) that contains a Microsoft Word document that provides detailed information about a Trouble Ticket;
COMMENT 
ON COLUMN trbtkt.secure_tickets.scrnimg
    
IS Large Object (LOB) that contains a screen print or other image that helps a problem solver identify how to act on a Trouble Ticket;

   清单2 使用附加数据重新载入表TRBTKT.TICKETS

SET SERVEROUTPUT ON
TRUNCATE TABLE trbtkt.tickets;

BEGIN

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 101
        ,description 
=> Trouble Ticket 101
        ,submit_dts 
=> 2008-12-31 23:45:00
        ,status 
=> OPEN
        ,docFileName 
=> New_101.doc
        ,imgFileName 
=> DBRIssues.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 102
        ,description 
=> Trouble Ticket 102
        ,submit_dts 
=> 2009-01-04 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_102.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 103
        ,description 
=> Trouble Ticket 103
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_103.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 104
        ,description 
=> Trouble Ticket 104
        ,submit_dts 
=> 2009-01-14 12:30:00
        ,status 
=> OPEN
        ,docFileName 
=> New_104.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 105
        ,description 
=> Trouble Ticket 105
        ,submit_dts 
=> 2009-01-09 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_105.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 106
        ,description 
=> Trouble Ticket 106
        ,submit_dts 
=> 2009-01-11 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_106.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 107
        ,description 
=> Trouble Ticket 107
        ,submit_dts 
=> 2009-01-16 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_107.doc
        ,imgFileName 
=> DBRIssues.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 108
        ,description 
=> Trouble Ticket 108
        ,submit_dts 
=> 2009-01-12 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_108.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 109
        ,description 
=> Trouble Ticket 109
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_109.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 110
        ,description 
=> Trouble Ticket 110
        ,submit_dts 
=> 2009-01-14 12:45:00
        ,status 
=> OPEN
        ,docFileName 
=> New_110.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 201
        ,description 
=> Trouble Ticket 201
        ,submit_dts 
=> 2008-12-31 23:45:00
        ,status 
=> PENDING
        ,docFileName 
=> New_101.doc
        ,imgFileName 
=> DBRIssues.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 202
        ,description 
=> Trouble Ticket 202
        ,submit_dts 
=> 2009-01-04 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_102.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 203
        ,description 
=> Trouble Ticket 203
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_103.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 204
        ,description 
=> Trouble Ticket 204
        ,submit_dts 
=> 2009-01-14 12:30:00
        ,status 
=> OPEN
        ,docFileName 
=> New_104.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 205
        ,description 
=> Trouble Ticket 205
        ,submit_dts 
=> 2009-01-09 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_105.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 206
        ,description 
=> Trouble Ticket 206
        ,submit_dts 
=> 2009-01-11 00:00:00
        ,status 
=> PENDING
        ,docFileName 
=> New_106.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 207
        ,description 
=> Trouble Ticket 207
        ,submit_dts 
=> 2009-01-16 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_107.doc
        ,imgFileName 
=> DBRIssues.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 208
        ,description 
=> Trouble Ticket 208
        ,submit_dts 
=> 2009-01-12 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_108.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 209
        ,description 
=> Trouble Ticket 209
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> PENDING
        ,docFileName 
=> New_109.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 210
        ,description 
=> Trouble Ticket 210
        ,submit_dts 
=> 2009-01-14 12:45:00
        ,status 
=> OPEN
        ,docFileName 
=> New_110.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 301
        ,description 
=> Trouble Ticket 301
        ,submit_dts 
=> 2008-12-31 23:45:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_101.doc
        ,imgFileName 
=> DBRIssues.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 302
        ,description 
=> Trouble Ticket 302
        ,submit_dts 
=> 2009-01-04 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_102.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 303
        ,description 
=> Trouble Ticket 303
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_103.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 304
        ,description 
=> Trouble Ticket 304
        ,submit_dts 
=> 2009-01-14 12:30:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_104.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 305
        ,description 
=> Trouble Ticket 305
        ,submit_dts 
=> 2009-01-09 00:00:00
        ,status 
=> PENDING
        ,docFileName 
=> New_105.doc
        ,imgFileName 
=> Unresolved.jpg
    );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 306
        ,description 
=> Trouble Ticket 306
        ,submit_dts 
=> 2009-01-11 00:00:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_106.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 307
        ,description 
=> Trouble Ticket 307
        ,submit_dts 
=> 2009-01-16 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_107.doc
        ,imgFileName 
=> DBRIssues.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 308
        ,description 
=> Trouble Ticket 308
        ,submit_dts 
=> 2009-01-12 00:00:00
        ,status 
=> OPEN
        ,docFileName 
=> New_108.doc
        ,imgFileName 
=> Unresolved.jpg
    );
    
    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 309
        ,description 
=> Trouble Ticket 309
        ,submit_dts 
=> 2009-01-02 00:00:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_109.doc
        ,imgFileName 
=> Unresolved.jpg
     );

    trbtkt.pkg_securefiles.AddTroubleTicket (
         tkt_id 
=> 310
        ,description 
=> Trouble Ticket 310
        ,submit_dts 
=> 2009-01-14 12:45:00
        ,status 
=> CLOSED
        ,docFileName 
=> New_110.doc
        ,imgFileName 
=> DBRIssues.jpg
   );

    
COMMIT;
   
END;
/
-- 收集优化器统计信息
BEGIN
    DBMS_STATS.GATHER_SCHEMA_STATS(ownname 
=> TRBTKTCASCADE => TRUE);
END;
/

 


  有效地从BasicFile移植到SecureFile

  现在已经将这些表进行了分区,以便在数据仓库环境更有效地使用,我也已经考虑过如何将LOB从BasicFile格式快速有效地转换成对应的SecureFile格式,幸运的是,Oracle 11g提供了两个方法:分区交换和在线重定义。

  1、分区交换

  分区交换载入(Partition Exchange Load,即PDL)有时也叫做分区转动,包含创建一个非分区表,它的格式和内容完全匹配目标分区表想要的分区,一旦原始表创建好了,就可以开始可已经分区的表的目标分区进行交换了,这个方法确实提供了许多好处,换句话说,原始表的本地索引在交换期间得到维护,它可以并行执行,这个方法可以重复多次以填充每个分区,它的主要缺点是接收数据的分区在进行交换时必须离线。

  2、在线重定义

  Oracle推荐使用DBMS_REDEFINITION包对源表和目标表执行在线重定义,因为它实现了分区交换方法相同的目标。但它不需要在重定义过程中将目标离线。在线重定义可以在表级也可以在分区级执行,它也可以同时并行为多个分区执行,我喜欢在线重定义的特性是在这个过程成功执行完毕后,源和目标对象将对真正地在数据库数据目录中转换定义,这意味着任何引用了新对象名的PL/SQL对象都不需要进行任何修改。清单3显示了如何使用TRBTKT.TICKETS表作为源对象,使用TRBTKT.SECURE_TICKETS表作为目标对象进行在线重定义的。从BasicFile LOB转换到SecureFile LOB最后一个注意事项是:一旦转换完成,LOB就不能再降级回到BasicFile LOB了。

  管理SecureFile元数据

  这些新的SecureFile特性无疑扩展了LOB的能力,对于DBA而言,也需要注意几个在传统的BasicFile LOB上增加的额外属性,幸运的是,Oracle 11g提供了多个方法跟踪BasicFile和SecureFile LOB的元数据。

  1、数据字典视图

  Oracle 11g也更新了多个关于SecureFile信息的数据字典视图,下面列出这些做了变动的视图。 

技术分享

  清单4显示了多条SQL*Plus查询,它们使用了这些数据字典视图返回关于SecureFile元数据的信息,报告1显示了从这些查询返回的结果。

  清单4 查询BasicFile和SecureFile LOB的元数据

SET PAGESIZE 1000
SET LINESIZE 140 
-- 视图: DBA_SEGMENTS
--
显示关于BasicFile 和SecureFile 段的元数据
TTITLE LOB Segment Information|(from DBA_SEGMENTS)
COL segment_name        FORMAT A30      HEADING 
Segment Name
COL segment_type        FORMAT A20      HEADING 
Segment|Type
COL segment_subtype     FORMAT A20      HEADING 
Segment|SubType
COL partition_name      FORMAT A12      HEADING 
Partition|Name
COL tablespace_name     FORMAT A12      HEADING 
Tablespace
SELECT 
    segment_name
   ,segment_type
   ,segment_subtype
   ,partition_name
   ,tablespace_name
  
FROM dba_segments
WHERE owner = TRBTKT
ORDER BY segment_name
;
TTITLE 
OFF
-- 视图: DBA_LOBS
--
显示关于BasicFile和SecureFile LOB的元数据
TTITLE BasicFile and SecureFile LOBs Metadata|(from DBA_LOBS)
COL table_name      FORMAT A14      HEADING 
Table
COL segment_name    FORMAT A26      HEADING 
Segment
COL column_name     FORMAT A10      HEADING 
Column
COL tablespace_name FORMAT A12      HEADING 
Tablespace
COL logging         FORMAT A08      HEADING 
Logging
COL cache           FORMAT A10      HEADING 
Cacheing
COL in_row          FORMAT A07      HEADING 
Stored|In Row
COL encrypt         FORMAT A07      HEADING 
Encryp-|tion
COL compression     FORMAT A07      HEADING 
Compre-|ssion
COL deduplication   FORMAT A08      HEADING 
DeDupli-|cation
COL securefile      FORMAT A07      HEADING 
Secure|File?
COL partitioned     FORMAT A07      HEADING 
Parti-|tioned
SELECT
    table_name
   ,column_name
   ,segment_name
   ,tablespace_name
   ,logging
   ,cache
   ,in_row
   ,encrypt
   ,compression
   ,deduplication
   ,securefile
   ,partitioned
  
FROM dba_lobs
WHERE owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF
--视图: DBA_PART_LOBS
--
显示BasicFile和SecureFile LOB的默认值
TTITLE BasicFile and SecureFile Partitioned LOB Default Settings|(from DBA_PART_LOBS)
COL table_name          FORMAT A20      HEADING 
Table
COL column_name         FORMAT A12      HEADING 
Column
COL def_cache           FORMAT A12      HEADING 
Cached
COL def_tablespace_name FORMAT A12      HEADING 
Tablespace
COL def_securefile      FORMAT A12      HEADING 
SecureFile
COL def_encrypt         FORMAT A12      HEADING 
Encrypted
COL def_compress        FORMAT A12      HEADING 
Compressed
COL def_deduplicate     FORMAT A12      HEADING 
DeDuplicated
SELECT
    table_name
   ,column_name
   ,def_cache
   ,def_tablespace_name
   ,def_securefile
   ,def_compress
   ,def_deduplicate
   ,def_encrypt
  
FROM dba_part_lobs
WHERE table_owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF
--视图: DBA_LOB_PARTITIONS
--
在独立的LOB级描述BasicFile和SecureFile设置
TTITLE BasicFile and SecureFile LOB Partitions|(from DBA_LOB_PARTITIONS)
COL table_name      FORMAT A16      HEADING 
Table
COL column_name     FORMAT A12      HEADING 
Column
COL partition_name  FORMAT A12      HEADING 
Stored in|Partition
COL cache           FORMAT A10      HEADING 
Cacheing
COL in_row          FORMAT A10      HEADING 
Stored|In Row
COL encrypt         FORMAT A10      HEADING 
Encrypted
COL compression     FORMAT A10      HEADING 
Compressed
COL deduplication   FORMAT A10      HEADING 
DeDupli-|cated
COL securefile      FORMAT A10      HEADING 
SecureFile?
SELECT
    table_name
   ,column_name
   ,partition_name
   ,cache
   ,in_row
   ,encrypt
   ,compression
   ,deduplication
   ,securefile
  
FROM dba_lob_partitions
WHERE table_owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF

报告1 从BasicFIle和SecureFile LOB元数据报告返回的结果

SET PAGESIZE 1000
SET LINESIZE 140 
-- 视图: DBA_SEGMENTS
--
显示关于BasicFile 和SecureFile 段的元数据
TTITLE LOB Segment Information|(from DBA_SEGMENTS)
COL segment_name        FORMAT A30      HEADING 
Segment Name
COL segment_type        FORMAT A20      HEADING 
Segment|Type
COL segment_subtype     FORMAT A20      HEADING 
Segment|SubType
COL partition_name      FORMAT A12      HEADING 
Partition|Name
COL tablespace_name     FORMAT A12      HEADING 
Tablespace
SELECT 
    segment_name
   ,segment_type
   ,segment_subtype
   ,partition_name
   ,tablespace_name
  
FROM dba_segments
WHERE owner = TRBTKT
ORDER BY segment_name
;
TTITLE 
OFF
-- 视图: DBA_LOBS
--
显示关于BasicFile和SecureFile LOB的元数据
TTITLE BasicFile and SecureFile LOBs Metadata|(from DBA_LOBS)
COL table_name      FORMAT A14      HEADING 
Table
COL segment_name    FORMAT A26      HEADING 
Segment
COL column_name     FORMAT A10      HEADING 
Column
COL tablespace_name FORMAT A12      HEADING 
Tablespace
COL logging         FORMAT A08      HEADING 
Logging
COL cache           FORMAT A10      HEADING 
Cacheing
COL in_row          FORMAT A07      HEADING 
Stored|In Row
COL encrypt         FORMAT A07      HEADING 
Encryp-|tion
COL compression     FORMAT A07      HEADING 
Compre-|ssion
COL deduplication   FORMAT A08      HEADING 
DeDupli-|cation
COL securefile      FORMAT A07      HEADING 
Secure|File?
COL partitioned     FORMAT A07      HEADING 
Parti-|tioned
SELECT
    table_name
   ,column_name
   ,segment_name
   ,tablespace_name
   ,logging
   ,cache
   ,in_row
   ,encrypt
   ,compression
   ,deduplication
   ,securefile
   ,partitioned
  
FROM dba_lobs
WHERE owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF
--视图: DBA_PART_LOBS
--
显示BasicFile和SecureFile LOB的默认值
TTITLE BasicFile and SecureFile Partitioned LOB Default Settings|(from DBA_PART_LOBS)
COL table_name          FORMAT A20      HEADING 
Table
COL column_name         FORMAT A12      HEADING 
Column
COL def_cache           FORMAT A12      HEADING 
Cached
COL def_tablespace_name FORMAT A12      HEADING 
Tablespace
COL def_securefile      FORMAT A12      HEADING 
SecureFile
COL def_encrypt         FORMAT A12      HEADING 
Encrypted
COL def_compress        FORMAT A12      HEADING 
Compressed
COL def_deduplicate     FORMAT A12      HEADING 
DeDuplicated
SELECT
    table_name
   ,column_name
   ,def_cache
   ,def_tablespace_name
   ,def_securefile
   ,def_compress
   ,def_deduplicate
   ,def_encrypt
  
FROM dba_part_lobs
WHERE table_owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF
--视图: DBA_LOB_PARTITIONS
--
在独立的LOB级描述BasicFile和SecureFile设置
TTITLE BasicFile and SecureFile LOB Partitions|(from DBA_LOB_PARTITIONS)
COL table_name      FORMAT A16      HEADING 
Table
COL column_name     FORMAT A12      HEADING 
Column
COL partition_name  FORMAT A12      HEADING 
Stored in|Partition
COL cache           FORMAT A10      HEADING 
Cacheing
COL in_row          FORMAT A10      HEADING 
Stored|In Row
COL encrypt         FORMAT A10      HEADING 
Encrypted
COL compression     FORMAT A10      HEADING 
Compressed
COL deduplication   FORMAT A10      HEADING 
DeDupli-|cated
COL securefile      FORMAT A10      HEADING 
SecureFile?
SELECT
    table_name
   ,column_name
   ,partition_name
   ,cache
   ,in_row
   ,encrypt
   ,compression
   ,deduplication
   ,securefile
  
FROM dba_lob_partitions
WHERE table_owner = TRBTKT
ORDER BY table_name, column_name
;
TTITLE 
OFF
报告1 从BasicFIle和SecureFile LOB元数据报告返回的结果
LOB段信息
                                                            (来自DBA_SEGMENTS)

                               Segment              Segment              Partition                                                          
Segment Name                   Type                 SubType              Name         Tablespace                                            
------------------------- -------------------- -------------------- ------------ ------------                                          
SECURE_TICKETS                 TABLE PARTITION      ASSM                 STS_PENDING  USERS                                                 
SECURE_TICKETS                 
TABLE PARTITION      ASSM                 STS_CLOSED   USERS                                                 
SECURE_TICKETS                 
TABLE PARTITION      ASSM                 STS_OPEN     USERS                                                 
SECURE_TICKETS                 
TABLE PARTITION      ASSM                 STS_OTHER    USERS                                                 
SYS_IL0000072118C00005$$       
INDEX PARTITION      ASSM                 SYS_IL_P180  BASICFILES                                            
SYS_IL0000072118C00005$$       
INDEX PARTITION      ASSM                 SYS_IL_P179  BASICFILES                                            
SYS_IL0000072118C00005$$       
INDEX PARTITION      ASSM                 SYS_IL_P178  BASICFILES                                            


如何从BasicFile迁移到SecureFile存储(一)