Oracle工具——csscan
轉載自：http://blog.itpub.net/4227/viewspace-706635/
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工具csscan用于檢查從一個字符集轉換到另一個字符集，數據庫中的數據是否會產生丟失、截斷等現象。
這個工具很早就出現了，不過由于長久以來牽制到字符集轉換的工作不是很多，因此對于這個工具沒什么研究，這次需要將ZHS16GBK轉換到AL32UTF8，嘗試了一下csscan的功能，發現這個工具還是很方便的。
[oracle@dbserver1 bin]$ csscan userid=thams/thams table=libfile722 tochar=AL32UTF8 log=/home/oracle/scan_722
Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Wed Aug 31 10:54:15 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
CSS-00127: user thams does not have DBA privilege
Scanner terminated unsuccessfully.
錯誤信息很明顯，連接用戶不是DBA角色，如果用system用戶連接進行這個命令：
[oracle@dbserver1 bin]$ csscan userid=system/oracle table=thams.libfile722 tochar=AL32UTF8 log=/home/oracle/scan_722
Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Wed Aug 31 10:54:45 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
CSS-00107: Character set migration utility schema not installed
Scanner terminated unsuccessfully.
導致這個錯誤是由于CSSCAN工具需要在數據庫中建立一個CSMIG用戶：
[oracle@dbserver1 bin]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.2.0 Production on Wed Aug 31 10:57:28 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
SQL> @?/rdbms/admin/csminst
User created.
Grant succeeded.
Grant succeeded.
Grant succeeded.
Grant succeeded.
Grant succeeded.
Grant succeeded.
Grant succeeded.
User altered.
1 row created.
1 row updated.
Table created.
.
.
.
View created.
View created.
View created.
View created.
Grant succeeded.
Grant succeeded.
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
[oracle@dbserver1 bin]$ csscan userid=system/oracle table=thams.libfile722 tochar=AL32UTF8 log=/home/oracle/scan_722
Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Wed Aug 31 10:59:35 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
Enter array fetch buffer size: 1024000 > 4096000
Enter number of scan processes to utilize(1..64): 1 >
Enumerating table to scan...
. process 1 scanning THAMS.LIBFILE722[AAAP2KAAAAAB7XYAAA]
Creating Database Scan Summary Report...
Creating Individual Exception Report...
Scanner terminated successfully.
調用csminst.sql腳本創建輔助用戶和對象后，再次運行csscan工具，對表中數據進行轉換前的掃描。
工具csscan的調用有命令行方式，和交互兩種，當命令行沒有提供足夠的參數，工具會以交互方式獲取其他參數。
操作完成后，可以檢查對應的日志信息：
[oracle@dbserver1 bin]$ more /home/oracle/scan_722.err
Database Scan Individual Exception Report
[Database Scan Parameters]
Parameter Value
------------------------------ ------------------------------------------------
CSSCAN Version v2.1
Instance Name fhacdb1
Database Version 11.2.0.2.0
Scan type Selective tables
Scan CHAR data? YES
Database character set ZHS16GBK
FROMCHAR ZHS16GBK
TOCHAR AL32UTF8
Scan NCHAR data? NO
Array fetch buffer size 4096000
Number of processes 1
Capture convertible data? NO
------------------------------ ------------------------------------------------
[Data Dictionary individual exceptions]
[Application data individual exceptions]
User : THAMS
Table : LIBFILE722
Column: F4
Type : VARCHAR2(42)
Number of Exceptions : 1
Max Post Conversion Data Size: 45
ROWID Exception Type Size Cell Data(first 30 bytes)
------------------ ------------------ ----- ------------------------------
AAAP2KAAAAAB+u0AAE exceed column size 45 巡視臺灣兼理學政陜西道監察御史
------------------ ------------------ ----- ------------------------------
[oracle@dbserver1 bin]$ more /home/oracle/scan_722.out
Character Set Scanner v2.2 : Release 11.2.0.2.0 - Production on Wed Aug 31 10:59:35 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
Enter array fetch buffer size: 1024000 >
Enter number of scan processes to utilize(1..64): 1 >
Enumerating table to scan...
. process 1 scanning THAMS.LIBFILE722[AAAP2KAAAAAB7XYAAA]
Creating Database Scan Summary Report...
Creating Individual Exception Report...
Scanner terminated successfully.
[oracle@dbserver1 bin]$ more /home/oracle/scan_722.txt
Database Scan Summary Report
Time Started : 2011-08-31 10:59:48
Time Completed: 2011-08-31 10:59:50
Process ID Time Started Time Completed
---------- -------------------- --------------------
1 2011-08-31 10:59:49 2011-08-31 10:59:49
---------- -------------------- --------------------
[Database Size]
Tablespace Used Free Total Expansion
------------------------- --------------- --------------- --------------- ---------------
SYSTEM 581.81M 118.19M 700.00M .00K
SYSAUX 521.38M 78.63M 600.00M .00K
UNDOTBS1 7.44M 20,699.56M 20,707.00M .00K
TEMP .00K .00K .00K .00K
USERS 1,930.38M 139.88M 2,070.25M .00K
LOB_AU2M 8,176.13M 1,937,423.88M 1,945,600.00M 212.00K
LOB_AU8M 10,074.69M 501,925.31M 512,000.00M .00K
DATA_ARCHIVE 5,332.06M 1,018,667.94M 1,024,000.00M .00K
LOB_AU32M 4,772.38M 507,227.63M 512,000.00M .00K
LOB_AU64M 4,548.38M 507,451.63M 512,000.00M .00K
------------------------- --------------- --------------- --------------- ---------------
Total 35,944.63M 4,493,732.63M 4,529,677.25M 212.00K
[Database Scan Parameters]
Parameter Value
------------------------------ ------------------------------------------------
CSSCAN Version v2.1
Instance Name fhacdb1
Database Version 11.2.0.2.0
Scan type Selective tables
Scan CHAR data? YES
Database character set ZHS16GBK
FROMCHAR ZHS16GBK
TOCHAR AL32UTF8
Scan NCHAR data? NO
Array fetch buffer size 4096000
Number of processes 1
Capture convertible data? NO
------------------------------ ------------------------------------------------
[Scan Summary]
Some character type application data are not convertible to the new character set
[Data Dictionary Conversion Summary]
Data Dictionary Tables:
Datatype Changeless Convertible Truncation Lossy
--------------------- ---------------- ---------------- ---------------- ----------------
VARCHAR2 0 0 0 0
CHAR 0 0 0 0
LONG 0 0 0 0
VARRAY 0 0 0 0
--------------------- ---------------- ---------------- ---------------- ----------------
Total 0 0 0 0
Total in percentage 0.000% 0.000% 0.000% 0.000%
XML CSX Dictionary Tables:
Datatype Changeless Convertible Truncation Lossy
--------------------- ---------------- ---------------- ---------------- ----------------
VARCHAR2 0 0 0 0
CHAR 0 0 0 0
LONG 0 0 0 0
VARRAY 0 0 0 0
--------------------- ---------------- ---------------- ---------------- ----------------
Total 0 0 0 0
Total in percentage 0.000% 0.000% 0.000% 0.000%
[Application Data Conversion Summary]
Datatype Changeless Convertible Truncation Lossy
--------------------- ---------------- ---------------- ---------------- ----------------
VARCHAR2 222,683 28,308 1 0
CHAR 0 0 0 0
LONG 0 0 0 0
VARRAY 0 0 0 0
--------------------- ---------------- ---------------- ---------------- ----------------
Total 222,683 28,308 1 0
Total in percentage 88.721% 11.278% 0.000% 0.000%
[Distribution of Convertible, Truncated and Lossy Data by Table]
Data Dictionary Tables:
USER.TABLE Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
---------------------------------------- ---------------- ---------------- ----------------
XML CSX Dictionary Tables:
USER.TABLE Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
---------------------------------------- ---------------- ---------------- ----------------
Application Data:
USER.TABLE Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
THAMS.LIBFILE722 28,308 1 0
---------------------------------------- ---------------- ---------------- ----------------
[Distribution of Convertible, Truncated and Lossy Data by Column]
Data Dictionary Tables:
USER.TABLE|COLUMN Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
---------------------------------------- ---------------- ---------------- ----------------
XML CSX Dictionary Tables:
USER.TABLE|COLUMN Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
---------------------------------------- ---------------- ---------------- ----------------
Application Data:
USER.TABLE|COLUMN Convertible Truncation Lossy
---------------------------------------- ---------------- ---------------- ----------------
THAMS.LIBFILE722|F11 4,648 0 0
THAMS.LIBFILE722|F2 4,643 0 0
THAMS.LIBFILE722|F3 4,648 0 0
THAMS.LIBFILE722|F46 222 0 0
THAMS.LIBFILE722|F6 4,312 0 0
THAMS.LIBFILE722|F7 565
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