[Oracle-l] Conversion of Character Set from US7ASCII to UTF8 in RAC 10gR2

Missed the Step (3) in the previous e-mail. Added below now.

Additionally Should the Database NOT be Shutdown after the Truncate till
Step 5 is Complete?

From: VIVEK_SHARMA
Sent: Tuesday, December 19, 2006 8:33 PM
To: 'oracle-l_at_freelists.org'
Subject: Conversion of Character Set from US7ASCII to UTF8 in RAC 10gR2

Folks

Need to Convert the Character Set of an Oracle10gR2 with RAC TEST
Database from the Default "US7ASCII" to UTF8

Is the following Procedure to be followed?

Shutdown the 2nd instance

Export ALL the Tables (including SYS, SYSTEM Schema) having CLOB
Datatype field

select distinct ('TABLE '||A.OWNER|| '.'||A.TABLE_NAME) from
dba_tab_columns A, dba_tables B where A.table_name = B.table_name and
DATA_TYPE= 'CLOB'

3) Truncate ALL Tables having CLOB fields including those of SYS &
SYSTEM Schema

e.g. SYS.SQL$TEXT, SYS.RULE$

4) SQL> ALTER DATABASE CHARACTER SET AL32UTF8;

5) Import back ALL the Tables exported in Step 1

6) Export related Environment Variables:-

NLS_LANG=.AL32UTF8; export NLS_LANG

LANG=en_US.UTF-8; export LANG

LC_ALL=en_US.UTF-8; export LC_ALL

Thanks indeed

Vivek

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There is a tool csscan, which is already in your $ORACLE_HOME/bin dir in
10g, that need to be executed.

It will warn you on column wide violation during conversion and some
others stuff such has uses of char() function in PL/SQL pkg.

Search on metalink, it is quite well explained.





Bernard Polarski

Oracle DBA



Direct +32(0)2 690 28 90

Fax +32(0)2 690 27 82



Da Vincilaan 5

1930 Zaventem

Belgium

www.atosorigin.com/be

From: VIVEK_SHARMA
Sent: dinsdag 19 december 2006 16:03
To: oracle-l_at_freelists.org
Subject: Conversion of Character Set from US7ASCII to UTF8 in RAC 10gR2



Folks



Need to Convert the Character Set of an Oracle10gR2 with RAC TEST
Database from the Default "US7ASCII" to UTF8



Is the following Procedure to be followed?



Shutdown the 2nd instance

Export ALL the Tables (including SYS, SYSTEM Schema) having CLOB
Datatype field

select distinct ('TABLE '||A.OWNER|| '.'||A.TABLE_NAME) from
dba_tab_columns A, dba_tables B where A.table_name = B.table_name and
DATA_TYPE= 'CLOB'



3) SQL> ALTER DATABASE CHARACTER SET AL32UTF8;



4) Import back ALL the Tables exported in Step 1



5) Export related Environment Variables:-



NLS_LANG=.AL32UTF8; export NLS_LANG

LANG=en_US.UTF-8; export LANG

LC_ALL=en_US.UTF-8; export LC_ALL



Thanks indeed



Vivek





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It is also on the "globalization guide".
The charset in 10gR2 should be AL32UTF8, not the "deprecated" UTF8 ...

Here are some notes :



Note 260192.1 Changing WE8ISO8859P1/WE8ISO8859P15 or WE8MSWIN1252 to
UTF8 with ALTER DATABASE CHARACTER SET

Note 119119.1 UTF8 Database Character Set Implications

Note 123670.1 Use Scanner Utility before Altering the Database Character
Set

Note 225912.1 Changing the Database Character Set - a short Overview





Bernard Polarski



From: VIVEK_SHARMA
Sent: dinsdag 19 december 2006 16:03
To: oracle-l_at_freelists.org
Subject: Conversion of Character Set from US7ASCII to UTF8 in RAC 10gR2



Folks



Need to Convert the Character Set of an Oracle10gR2 with RAC TEST
Database from the Default "US7ASCII" to UTF8



Is the following Procedure to be followed?



Shutdown the 2nd instance

Export ALL the Tables (including SYS, SYSTEM Schema) having CLOB
Datatype field

select distinct ('TABLE '||A.OWNER|| '.'||A.TABLE_NAME) from
dba_tab_columns A, dba_tables B where A.table_name = B.table_name and
DATA_TYPE= 'CLOB'



3) SQL> ALTER DATABASE CHARACTER SET AL32UTF8;



4) Import back ALL the Tables exported in Step 1



5) Export related Environment Variables:-



NLS_LANG=.AL32UTF8; export NLS_LANG

LANG=en_US.UTF-8; export LANG

LC_ALL=en_US.UTF-8; export LC_ALL



Thanks indeed



Vivek





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Just in case: AL32UTF8 is not the same as UTF8. It is a superset, but
there are cases where something is only verified and supported in a
particular character set, so be sure you are converting to the right
one.



I do not believe you have to export/import to go from US7ASCII to
UTF8/AL32UTF8. You may wish to google or metalink for a faster
approach.



Joel Patterson
Database Administrator
joel.patterson_at_crowley.com
x72546
904 727-2546

From: oracle-l-bounce_at_freelists.org
On Behalf Of VIVEK_SHARMA
Sent: Tuesday, December 19, 2006 10:14 AM
To: oracle-l_at_freelists.org
Subject: RE: Conversion of Character Set from US7ASCII to UTF8 in RAC
10gR2



Missed the Step (3) in the previous e-mail. Added below now.



Additionally Should the Database NOT be Shutdown after the Truncate till
Step 5 is Complete?



From: VIVEK_SHARMA
Sent: Tuesday, December 19, 2006 8:33 PM
To: 'oracle-l_at_freelists.org'
Subject: Conversion of Character Set from US7ASCII to UTF8 in RAC 10gR2



Folks



Need to Convert the Character Set of an Oracle10gR2 with RAC TEST
Database from the Default "US7ASCII" to UTF8



Is the following Procedure to be followed?



Shutdown the 2nd instance

Export ALL the Tables (including SYS, SYSTEM Schema) having CLOB
Datatype field

select distinct ('TABLE '||A.OWNER|| '.'||A.TABLE_NAME) from
dba_tab_columns A, dba_tables B where A.table_name = B.table_name and
DATA_TYPE= 'CLOB'



3) Truncate ALL Tables having CLOB fields including those of SYS &
SYSTEM Schema

e.g. SYS.SQL$TEXT, SYS.RULE$



4) SQL> ALTER DATABASE CHARACTER SET AL32UTF8;



5) Import back ALL the Tables exported in Step 1



6) Export related Environment Variables:-



NLS_LANG=.AL32UTF8; export NLS_LANG

LANG=en_US.UTF-8; export LANG

LC_ALL=en_US.UTF-8; export LC_ALL



Thanks indeed



Vivek





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This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
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recipient, please notify the sender by e-mail and delete the original
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e-mail or its contents to any other person and any such actions are
unlawful. This e-mail may contain viruses. Infosys has taken every
reasonable precaution to minimize this risk, but is not liable for any
damage you may sustain as a result of any virus in this e-mail. You
should carry out your own virus checks before opening the e-mail or
attachment. Infosys reserves the right to monitor and review the content
of all messages sent to or from this e-mail address. Messages sent to or
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Folks, Bernard



Thanks Bernard for the Help, as always.



Is Change of Character Set from US7ASCII to AL32UTF8 a 1-way street?

To revert back to US7ASCII does one need to put back the COLD Backup
taken in US7ASCII?



NOTE - This is a TESTING RAC Database, but of 3 TB Size



Additionally does anything SPECIAL needs to be for a "RAC" Database's
conversion?



Thanks indeed



Vivek





From: Polarski, Bernard
Sent: Tuesday, December 19, 2006 8:50 PM
To: VIVEK_SHARMA; oracle-l_at_freelists.org
Subject: RE: Conversion of Character Set from US7ASCII to UTF8 in RAC
10gR2



Here are some notes :



Note 260192.1 Changing WE8ISO8859P1/WE8ISO8859P15 or WE8MSWIN1252 to
UTF8 with ALTER DATABASE CHARACTER SET

Note 119119.1 UTF8 Database Character Set Implications

Note 123670.1 Use Scanner Utility before Altering the Database Character
Set

Note 225912.1 Changing the Database Character Set - a short Overview





Bernard Polarski



CAUTION - Disclaimer *****************
This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
solely for the use of the addressee(s). If you are not the intended
recipient, please notify the sender by e-mail and delete the original
message. Further, you are not to copy, disclose, or distribute this
e-mail or its contents to any other person and any such actions are
unlawful. This e-mail may contain viruses. Infosys has taken every
reasonable precaution to minimize this risk, but is not liable for any
damage you may sustain as a result of any virus in this e-mail. You
should carry out your own virus checks before opening the e-mail or
attachment. Infosys reserves the right to monitor and review the content
of all messages sent to or from this e-mail address. Messages sent to or
from this e-mail address may be stored on the Infosys e-mail system.
***INFOSYS******** End of Disclaimer ********INFOSYS***