通过ftp/http拷贝asm中文件

1.检查Oracle XML Database组件

SQL> select comp_name, status, version from DBA_REGISTRY where comp_name='Oracle XML Database';

COMP_NAME                 STATUS                 VERSION
------------------------- ---------------------- ------------------------------
Oracle XML Database       VALID                  11.2.0.3.0

SQL> select count(*) from dba_objects where owner='XDB' and status='INVALID';

  COUNT(*)
----------
         0

2.配置xdb的ftp和http

[oracle@rac1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue May 1 12:05:27 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> execute dbms_xdb.sethttpport(8080);

PL/SQL procedure successfully completed.

SQL> execute dbms_xdb.setftpport(2100);

PL/SQL procedure successfully completed.

SQL> commit;

Commit complete.

SQL> select dbms_xdb.GETFTPPORT() from dual;

DBMS_XDB.GETFTPPORT()
---------------------
                 2100

SQL> select dbms_xdb.GETHTTPPORT() from dual;

DBMS_XDB.GETHTTPPORT()
----------------------
                  8080
--根据你的需求,可以选择一个即可

SQL> show parameter dispatchers;

NAME                                 TYPE        VALUE
------------------------------------ ----------- -------------------------------
dispatchers                          string      (PROTOCOL=TCP) (SERVICE=XFFXDB)
--dispatchers参数会自动配置,这里需要说明,MOS中说的sidxdb是不恰当的,我这里是db_namexdb
--因为我这里是rac,sid为XFF1,总之相信自动配置

3.查看监听

[oracle@rac1 ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 01-MAY-2012 12:09:14

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                01-MAY-2012 11:51:13
Uptime                    0 days 0 hr. 18 min. 1 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File         /u01/app/gridbase/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.31)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.33)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=2100))(Presentation=FTP)(Session=RAW))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "XFF" has 1 instance(s).
  Instance "XFF1", status READY, has 1 handler(s) for this service...
Service "XFFXDB" has 1 instance(s).
  Instance "XFF1", status READY, has 1 handler(s) for this service...
The command completed successfully

--以下两条监听是自动增加上去,如果没有自动增加,需要手工增加并且重启或者重新加载监听
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=2100))(Presentation=FTP)(Session=RAW))

4.ftp基本操作

[oracle@rac1 ~]$ ftp -n
ftp> open rac1 2100
Connected to rac1.
220- rac1 
Unauthorised use of this FTP server is prohibited and may be subject to civil and criminal prosecution.
220 rac1 FTP Server (Oracle XML DB/Oracle Database) ready.
530  Please login with USER and PASS.
530  Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
ftp> user system xifenfei
331 pass required for SYSTEM
230 SYSTEM logged in
ftp> ls
227 Entering Passive Mode (192,168,1,31,181,5)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 OLAP_XDS
drw-r--r--   2 SYS      oracle         0 SEP 18 17:47 home
drw-r--r--   2 SYS      oracle         0 SEP 18 18:02 images
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 olap_data_security
drw-r--r--   2 SYS      oracle         0 SEP 18 17:43 public
drw-r--r--   2 SYS      oracle         0 SEP 18 17:44 sys
-rw-r--r--   1 SYS      oracle         0 MAY 01 04:06 xdbconfig.xml
drw-r--r--   2 SYS      oracle         0 SEP 18 17:49 xds
226 ASCII Transfer Complete
ftp> cd sys
250 CWD Command successful
ftp> cd asm
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,98,133)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:14 XIFENFEI
drw-r--r--   2 SYS      oracle         0 MAY 01 04:14 DATA
226 ASCII Transfer Complete
ftp> cd xifenfei
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,151,70)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 XFF
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 ASM
226 ASCII Transfer Complete
ftp> cd xff
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,100,14)
150 ASCII Data Connection
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 DATAFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 CONTROLFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 ONLINELOG
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 TEMPFILE
drw-r--r--   2 SYS      oracle         0 MAY 01 04:15 PARAMETERFILE
-rw-r--r--   1 SYS      oracle      3584 MAY 01 04:15 spfileXFF.ora
226 ASCII Transfer Complete
ftp> cd xff/datafile
250 CWD Command successful
ftp> ls
227 Entering Passive Mode (192,168,1,31,30,63)
150 ASCII Data Connection
-rw-r--r--   1 SYS      oracle  744497152 MAY 01 04:20 SYSTEM.256.776961315
-rw-r--r--   1 SYS      oracle  618668032 MAY 01 04:20 SYSAUX.257.776961315
-rw-r--r--   1 SYS      oracle  83894272 MAY 01 04:20 UNDOTBS1.258.776961317
-rw-r--r--   1 SYS      oracle   6291456 MAY 01 04:20 user_dd.dbf
-rw-r--r--   1 SYS      oracle  26222592 MAY 01 04:20 UNDOTBS2.264.776961693
-rw-r--r--   1 SYS      oracle  157294592 MAY 01 04:20 xifenfei01.dbf
226 ASCII Transfer Complete
ftp> get xifenfei01.dbf
local: xifenfei01.dbf remote: xifenfei01.dbf
227 Entering Passive Mode (192,168,1,31,143,34)
150 ASCII Data Connection
550- Error Response 
ORA-31198: Mismatch in number of bytes transferred due to non-binary mode
550 End Error Response 
270340 bytes received in 0.053 seconds (5e+03 Kbytes/s)
ftp> binary
200  Type set to I.
ftp> get xifenfei01.dbf
local: xifenfei01.dbf remote: xifenfei01.dbf
227 Entering Passive Mode (192,168,1,31,9,112)
150 BIN Data Connection
226 BIN Transfer Complete
157294592 bytes received in 14 seconds (1.1e+04 Kbytes/s)
--主要需要设置为二进制传输模式,默认是ASCII方式的,可能会报错
ftp> quit
221 QUIT Goodbye.

这篇文章主要参考How to configure XDB for using ftp and http protocols with ASM [ID 357714.1],但是在自己试验过程中,发现文档中有些地方不太合适,这里做个补充说明
1.ftp服务端不需要启动(这里只是用到了操作系统的ftp客户端功能,如果使用其他客户端工具,连操作系统客户端都省了)
2.dispatchers 中的SERVICE=XDB不准确,系统自动配置的XDB亦可以正常工作,更相信数据库自动配置
3.ftp和http两个功能,只需要配置一个即可(选择你需要的)
4.下图展示的是通过http方式访问结果(system用户登录)
http_asm

bbed 找回被删除数据

创建模拟表数据

SQL> create table t_xifenfei(id number,name varchar2(10));

Table created.

SQL> insert into t_xifenfei values(1,'xifenfei');

1 row created.

SQL> insert into t_xifenfei values(2,'XIFENFEI');

1 row created.

SQL> commit;

Commit complete.

dump数据块

SQL> alter system flush BUFFER_CACHE;

System altered.

SQL> select   rowid,id,name,
  2  dbms_rowid.rowid_relative_fno(rowid)rel_fno,
  3  dbms_rowid.rowid_block_number(rowid)blockno,
  4  dbms_rowid.rowid_row_number(rowid) rowno
  5  from chf.t_xifenfei;

ROWID                      ID NAME          REL_FNO    BLOCKNO      ROWNO
------------------ ---------- ---------- ---------- ---------- ----------
AAASdmAAEAAAACvAAA          1 xifenfei            4        175          0
AAASdmAAEAAAACvAAB          2 XIFENFEI            4        175          1

SQL> alter system dump datafile 4 block 175;

System altered.

dump文件内容

block_row_dump:
tab 0, row 0, @0x1f89
tl: 15 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 02
col  1: [ 8]  78 69 66 65 6e 66 65 69
tab 0, row 1, @0x1f7a
tl: 15 fb: --H-FL-- lb: 0x1  cc: 2
col  0: [ 2]  c1 03
col  1: [ 8]  58 49 46 45 4e 46 45 49
end_of_block_dump
2012-05-01 05:09:29.287714 : kjbmbassert [0xaf.4]
End dump data blocks tsn: 4 file#: 4 minblk 175 maxblk 175

删除表数据

SQL> delete from t_xifenfei;

2 rows deleted.

SQL> commit;

Commit complete.

SQL> alter system flush BUFFER_CACHE;

System altered.

SQL> alter system dump datafile 4 block 175;

System altered.

dump文件内容

block_row_dump:
tab 0, row 0, @0x1f89
tl: 2 fb: --HDFL-- lb: 0x2 
tab 0, row 1, @0x1f7a
tl: 2 fb: --HDFL-- lb: 0x2 
end_of_block_dump
2012-05-01 05:13:35.214357 : kjbmbassert [0xaf.4]
End dump data blocks tsn: 4 file#: 4 minblk 175 maxblk 175

通过对比这两次的dump文件发现

1.数据内容被删除,并不是真正删除,而是给其增加了一个标识位(fd:---D----)
2.fb:--H-FL--(head of row piece+first data piece+last data piece )
  其有8个选项每个选项的值分别对应bitmask即32+8+4=44 or 0x2c
3.如果一个row被delete了,那么row flag就会更新,bitmask里的deleted被设置为16.
  此时row flag为:32+16+8+4 = 60 or 0x3c.
4.如果我们要找回来被删除的数据,只需要把3c改为2c即可

关闭数据库

SQL> select * from chf.t_xifenfei;

no rows selected

SQL> select name from v$datafile where file#=4;

NAME
------------------------------------------------
/tmp/user01.dbf

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

bbed修改数据

BBED> set filename '/tmp/user01.dbf'
        FILENAME        /tmp/user01.dbf

BBED> set block 175
        BLOCK#          175

BBED> set blocksize 8192
        BLOCKSIZE       8192

BBED> set mode edit
        MODE            Edit

BBED> map 
 File: /tmp/user01.dbf (0)
 Block: 175                                   Dba:0x00000000
------------------------------------------------------------
 KTB Data Block (Table/Cluster)

 struct kcbh, 20 bytes                      @0       

 struct ktbbh, 72 bytes                     @20      

 struct kdbh, 14 bytes                      @100     

 struct kdbt[1], 4 bytes                    @114     

 sb2 kdbr[2]                                @118     

 ub1 freespace[8036]                        @122     

 ub1 rowdata[30]                            @8158    

 ub4 tailchk                                @8188    

BBED> p *kdbr[0]
rowdata[15]
-----------
ub1 rowdata[15]                             @8173     0x3c

BBED> p *kdbr[1]
rowdata[0]
----------
ub1 rowdata[0]                              @8158     0x3c

BBED> m /x 2c offset 8158
 File: /tmp/user01.dbf (0)
 Block: 175              Offsets: 8158 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 2c630202 c1030858 4946454e 46454932 630202c1 02087869 66656e66 65690106 
 b47e 

 <32 bytes per line>

BBED>  m /x 2c offset 8173
 File: /tmp/user01.dbf (0)
 Block: 175              Offsets: 8173 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 2c630202 c1020878 6966656e 66656901 06b47e 

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 175:
current = 0x4d13, required = 0x4d13

启动数据库验证

SQL> startup 
ORACLE instance started.

Total System Global Area  535662592 bytes
Fixed Size                  1346140 bytes
Variable Size             411043236 bytes
Database Buffers          117440512 bytes
Redo Buffers                5832704 bytes
Database mounted.
Database opened.
SQL> select * from chf.t_xifenfei;

        ID NAME
---------- ----------
         1 xifenfei
         2 XIFENFEI

exp导出数据报EXP-00056/ORA-01403错误

exp导出数据报EXP-00056/ORA-01403错误

[oracle@xifenfei ~]$ exp chf/xifenfei file=/tmp/chf.dmp log=/tmp/chf.log owner=chf

Export: Release 9.2.0.4.0 - Production on Sun Apr 29 03:11:31 2012

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.


Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)

About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user CHF 
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user CHF 
About to export CHF's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
EXP-00056: ORACLE error 1403 encountered
ORA-01403: no data found
EXP-00000: Export terminated unsuccessfully

查看组件信息

SQL> select * from v$version;

BANNER
-------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
PL/SQL Release 9.2.0.4.0 - Production
CORE    9.2.0.3.0       Production
TNS for Linux: Version 9.2.0.4.0 - Production
NLSRTL Version 9.2.0.4.0 - Production

SQL> col comp_id for a15
SQL> col status for a7
SQL> col version for a10
SQL> col comp_name for a30
SQL> set pagesize 1000
SQL> SELECT substr(comp_id,1,15) comp_id, status, substr(version,1,10) version,
  2     substr(comp_name,1,30) comp_name FROM dba_registry ORDER BY 1;

COMP_ID         STATUS  VERSION    COMP_NAME
--------------- ------- ---------- ------------------------------
AMD             VALID   9.2.0.4.0  OLAP Catalog
APS             LOADED  9.2.0.4.0  OLAP Analytic Workspace
CATALOG         VALID   9.2.0.4.0  Oracle9i Catalog Views
CATJAVA         VALID   9.2.0.4.0  Oracle9i Java Packages
CATPROC         VALID   9.2.0.4.0  Oracle9i Packages and Types
CONTEXT         VALID   9.2.0.4.0  Oracle Text
JAVAVM          VALID   9.2.0.4.0  JServer JAVA Virtual Machine
ODM             LOADED  9.2.0.1.0  Oracle Data Mining
ORDIM           VALID   9.2.0.4.0  Oracle interMedia
OWM             VALID   9.2.0.1.0  Oracle Workspace Manager
SDO             LOADED  9.2.0.4.0  Spatial
WK              VALID   9.2.0.4.0  Oracle Ultra Search
XDB             VALID   9.2.0.4.0  Oracle XML Database
XML             VALID   9.2.0.6.0  Oracle XDK for Java
XOQ             LOADED  9.2.0.4.0  Oracle OLAP API

15 rows selected.

SQL> SELECT status, object_id, object_type, owner||'.'||object_name 
  2     "OWNER.OBJECT" FROM dba_objects WHERE owner='XDB' AND status != 'VALID' 
  3     ORDER BY 4,2;

no rows selected

做1403跟踪

SQL> ALTER SYSTEM SET EVENTS '1403 trace name errorstack level 3';

[oracle@xifenfei ~]$ exp chf/xifenfei file=/tmp/chf.dmp log=/tmp/chf.log owner=chf

SQL> ALTER SYSTEM SET EVENTS '1403 trace name errorstack off';

trace文件关键内容

*** SESSION ID:(11.17) 2012-04-29 03:17:13.555
*** 2012-04-29 03:17:13.555
ksedmp: internal or fatal error
ORA-01403: no data found
Current SQL statement for this session:
SELECT xdb_uid FROM SYS.EXU9XDBUID

问题原因
因为控制文件重建或者使用历史控制文件恢复,忘记添加临时文件

SQL> select name from v$tempfile;

no rows selected

解决方法
添加临时文件

SQL> alter tablespace TEMP add tempfile
  2 '/u01/oracle/oradata/xifenfei/temp01.dbf' size 10M reuse;

Tablespace altered.

SQL> select name from v$tempfile;

NAME
------------------------------------------------
/u01/oracle/oradata/xifenfei/temp01.dbf

验证exp导出

[oracle@xifenfei udump]$ exp chf/xifenfei file=/tmp/chf.dmp log=/tmp/chf.log owner=chf

Export: Release 9.2.0.4.0 - Production on Sun Apr 29 05:20:21 2012

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.


Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)

About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user CHF 
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user CHF 
About to export CHF's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export CHF's tables via Conventional Path ...
. . exporting table ACC_OWE_TASK_LIST_HIS_07711202       4111 rows exported
. . exporting table                   CHF_XIFENFEI        868 rows exported
. . exporting table                     PLAN_TABLE          0 rows exported
. . exporting table                        T_XFF01          0 rows exported
. . exporting table                     T_XIFENFEI          1 rows exported
. exporting synonyms
. exporting views
. exporting stored procedures
. exporting operators
. exporting referential integrity constraints
. exporting triggers
. exporting indextypes
. exporting bitmap, functional and extensible indexes
. exporting posttables actions
. exporting materialized views
. exporting snapshot logs
. exporting job queues
. exporting refresh groups and children
. exporting dimensions
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully no warnings.

sql profile 使用

本实验室为了说明sql profile的使用方法,不去研讨sql的执行效率.通过sql profile的方法使得一条本该使用index的sql该走全表扫描.
创建模拟表

SQL> select * from v$version;

BANNER
-----------------------------------------------------------------------

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for 32-bit Windows: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

SQL> create table t_xifenfei as select * from dba_objects;

表已创建。

SQL> create index i_xifenfei on t_xifenfei(object_id);

索引已创建。

SQL> EXEC DBMS_STATS.gather_table_stats(user,'T_XIFENFEI',CASCADE=>TRUE);

PL/SQL 过程已成功完成。

默认使用INDEX

SQL> SET AUTOT TRACE EXP
SQL> SELECT OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100;

执行计划
----------------------------------------------------------
Plan hash value: 1926396081

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

| Id  | Operation                   | Name       | Rows  | Bytes | Cost (%CPU)|Time     |

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

|   0 | SELECT STATEMENT            |            |     1 |    30 |     2   (0)|00:00:01 |

|   1 |  TABLE ACCESS BY INDEX ROWID| T_XIFENFEI |     1 |    30 |     2   (0)|00:00:01 |

|*  2 |   INDEX RANGE SCAN          | I_XIFENFEI |     1 |       |     1   (0)|00:00:01 |

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


Predicate Information (identified by operation id):
---------------------------------------------------

   2 - access("OBJECT_ID"=100)

使用hint实现全表扫描

SQL> SELECT /*+ FULL(T_XIFENFEI)*/OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=10
0;

执行计划
----------------------------------------------------------
Plan hash value: 548923532

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

| Id  | Operation         | Name       | Rows  | Bytes | Cost (%CPU)| Time     |

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

|   0 | SELECT STATEMENT  |            |     1 |    30 |   300   (1)| 00:00:04 |

|*  1 |  TABLE ACCESS FULL| T_XIFENFEI |     1 |    30 |   300   (1)| 00:00:04 |

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


Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("OBJECT_ID"=100)

查找hint对应sql的sql_id

SQL> SELECT SQL_ID,SQL_TEXT FROM V$SQL WHERE SQL_TEXT LIKE '%/*+ FULL(T_XIFENFEI)*/%';

SQL_ID
-------------
SQL_TEXT
--------------------------------------------------------------------------------

0bbt69m5yhf3p
SELECT /*+ FULL(T_XIFENFEI)*/OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100

68r1cnxmn8fjk
SELECT SQL_ID,SQL_TEXT FROM V$SQL WHERE SQL_TEXT LIKE '%/*+ FULL(T_XIFENFEI)*/%'


ddmhrzhatfdyh
EXPLAIN PLAN SET STATEMENT_ID='PLUS570193' FOR SELECT /*+ FULL(T_XIFENFEI)*/OBJE

CT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100

SQL_ID
-------------
SQL_TEXT
--------------------------------------------------------------------------------


bybs0sds8yu9c
SELECT SQL_ID FROM V$SQL WHERE SQL_TEXT LIKE '%/*+ FULL(T_XIFENFEI)*/%'

获得对应Outline

SQL> SET PAGESIZE 10000
SQL> select * from table(dbms_xplan.display_cursor('0bbt69m5yhf3p',null,'outline'));

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------

SQL_ID  0bbt69m5yhf3p, child number 0
-------------------------------------
SELECT /*+ FULL(T_XIFENFEI)*/OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100

Plan hash value: 548923532

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

| Id  | Operation         | Name       | Rows  | Bytes | Cost (%CPU)| Time     |

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

|   0 | SELECT STATEMENT  |            |       |       |   300 (100)|          |

|*  1 |  TABLE ACCESS FULL| T_XIFENFEI |     1 |    30 |   300   (1)| 00:00:04 |

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


Outline Data
-------------

  /*+
      BEGIN_OUTLINE_DATA
      IGNORE_OPTIM_EMBEDDED_HINTS
      OPTIMIZER_FEATURES_ENABLE('11.2.0.3')
      DB_VERSION('11.2.0.3')
      ALL_ROWS
      OUTLINE_LEAF(@"SEL$1")
      FULL(@"SEL$1" "T_XIFENFEI"@"SEL$1")
      END_OUTLINE_DATA
  */

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("OBJECT_ID"=100)


已选择33行。

创建sql profile

declare
 v_hints sys.sqlprof_attr;
 begin
 v_hints:=sys.sqlprof_attr(
      'BEGIN_OUTLINE_DATA',
      'IGNORE_OPTIM_EMBEDDED_HINTS',
      'OPTIMIZER_FEATURES_ENABLE(''11.2.0.3'')',
      'DB_VERSION(''11.2.0.3'')',
      'ALL_ROWS',
      'OUTLINE_LEAF(@"SEL$1")',
      'FULL(@"SEL$1" "T_XIFENFEI"@"SEL$1")',   --这个是由于hint产生,其实我们需要的就是这个
      'END_OUTLINE_DATA');
dbms_sqltune.import_sql_profile(
'SELECT OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100',
v_hints,'SQLPROFILE_XIFENFEI',                 --sql profile 名称
force_match=>true,replace=>true);
end;
/

验证sql profile

SQL> SELECT OBJECT_NAME FROM T_XIFENFEI WHERE OBJECT_ID=100;

执行计划
----------------------------------------------------------
Plan hash value: 548923532

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

| Id  | Operation         | Name       | Rows  | Bytes | Cost (%CPU)| Time     |

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

|   0 | SELECT STATEMENT  |            |     1 |    30 |   300   (1)| 00:00:04 |

|*  1 |  TABLE ACCESS FULL| T_XIFENFEI |     1 |    30 |   300   (1)| 00:00:04 |

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Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("OBJECT_ID"=100)

Note
-----
   - SQL profile "SQLPROFILE_XIFENFEI" used for this statement

DB2 主要行级锁模拟

S行锁和X行锁模拟

--会话1
[db2inst1@xifenfei ~]$ db2 "create table t_xifenfei(id int,name varchar(100))"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 +c "insert into t_xifenfei values(1,'www.orasos.com')"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:07:02 -- Date 2012-04-29-01.46.48.462742

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg
0x99B3AE40 8          53514C4332473137315992A241 Internal P ..S  G   8          1   0          0x00 0x40000000 
0x99B3A690 8          02000700040080000000000052 Row        ..X  G   8          1   0          0x08 0x40000000 
0x99B3A6F0 8          02000700000000000000000054 Table      .IX  G   8          1   0          0x00 0x40000000 

--会话2
[db2inst1@xifenfei ~]$ db2 "select * from t_xifenfei"
hang住

--会话3查询等待
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:08:40 -- Date 2012-04-29-01.48.26.676607

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg
0x99B3AE40 8          53514C4332473137315992A241 Internal P ..S  G   8          1   0          0x00 0x40000000 
0x99B3A540 7          53514C4332473137315992A241 Internal P ..S  G   7          1   0          0x00 0x40000000 
0x99B3A690 8          02000700040080000000000052 Row        ..X  G   8          1   0          0x08 0x40000000 
0x99B40C60 7          02000700040080000000000052 Row        .NS  W   8          1   0          0x00 0x00000001 
0x99B3A420 7          02000000010000000100407056 Internal V ..S  G   7          1   0          0x00 0x40000000 
0x99B3A6F0 8          02000700000000000000000054 Table      .IX  G   8          1   0          0x00 0x40000000 
0x99B3A510 7          02000700000000000000000054 Table      .IS  G   7          1   0          0x00 0x00000001 
--这里可以发现Sts=W(STATUS=WAIT),会话的NS锁处于等待状态

--会话1
[db2inst1@xifenfei ~]$ db2 commit
DB20000I  The SQL command completed successfully.

--会话2
[db2inst1@xifenfei ~]$ db2 "select * from t_xifenfei"

ID          NAME                                                                                                
----------- ----------------------------------------------------------------------------------------------------
          1 www.orasos.com                                                                                    

  1 record(s) selected.
--结果出现

--会话3
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:09:06 -- Date 2012-04-29-01.48.52.069878

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg

U锁模拟

--会话1
[db2inst1@xifenfei ~]$ db2 +c "declare c1 cursor for select * from t_xifenfei for update"
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 +c open c1
DB20000I  The SQL command completed successfully.
[db2inst1@xifenfei ~]$ db2 +c fetch c1

ID          NAME                                                                                                
----------- ----------------------------------------------------------------------------------------------------
          1 WWW.XIFENFEI.COM                                                                                    

  1 record(s) selected.

--会话2
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:27:27 -- Date 2012-04-29-02.07.13.594441

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg
0x99B3A420 7          53514C4332473137315992A241 Internal P ..S  G   7          1   0          0x00 0x40000000 
0x99B3A510 7          02000700040080000000000052 Row        ..U  G   7          1   0          0x00 0x00000001 
0x99B40C60 7          01000000010000000100807256 Internal V ..S  G   7          1   0          0x00 0x40000000 
0x99B3A4E0 7          02000700000000000000000054 Table      .IX  G   7          1   0          0x00 0x00000001 

--会话1
[db2inst1@xifenfei ~]$ db2 +c "update t_xifenfei set name='www.orasos.com'"
DB20000I  The SQL command completed successfully.

--会话2
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:27:44 -- Date 2012-04-29-02.07.30.684616

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg
0x99B3A420 7          53514C4332473137315992A241 Internal P ..S  G   7          1   0          0x00 0x40000000 
0x99B3A510 7          02000700040080000000000052 Row        ..X  G   7          2   0          0x00 0x40000001 
0x99B40C60 7          01000000010000000100807256 Internal V ..S  G   7          1   0          0x00 0x40000000 
0x99B3A4E0 7          02000700000000000000000054 Table      .IX  G   7          2   0          0x00 0x40000001 
--行级锁由U升级到X

--会话1
[db2inst1@xifenfei ~]$ db2 commit
DB20000I  The SQL command completed successfully.

--会话2
[db2inst1@xifenfei ~]$ db2pd -d xifenfei -locks

Database Partition 0 -- Database XIFENFEI -- Active -- Up 0 days 02:31:43 -- Date 2012-04-29-02.11.29.167659

Locks:
Address    TranHdl    Lockname                   Type       Mode Sts Owner      Dur HoldCount  Att  ReleaseFlg
Posted in DB2 |