Oracle-L: RE: alter database character set (Was: RE: 'internal' role and 9i)

From: Thomas Day <tday6_at_csc.com>
Date: Tue, 18 Nov 2003 10:34:25 -0800
Message-ID: <F001.005D711B.20031118103425@fatcity.com>

It does. If you do a full import from a US7ASCII database into a WE8ISO8859P1 database and you need to change the WE8ISO8859P1 database to US7ASCII then this is the way to do it.

ALTER DATABASE CHARACTER SET internal_use us7ascii;

Make sure you know what you're doing. See Metalink Doc Id 100751.996

                                                                                                                                       
                      Yong Huang                                                                                                       
                      <yong321                 To:      Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>                    
                      @yahoo.com>              cc:                                                                                     
                      Sent by:                 Subject: RE: alter database character set (Was: RE: 'internal' role and 9i)             
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                      11/18/2003 12:49                                                                                                 
                      PM                                                                                                               
                      Please respond                                                                                                   
                      to ORACLE-L

Gopal,

In case I didn't make my message clear, I wanted to know if using that keyword
allows us to change character set from a superset to a subset (e.g. from UTF8
to US7ASCII). The documented command ALTER DATABASE CHARACTER SET <new charset>
is only for changing from a subset to a superset. If changing to a "lower" character set works, what's the syntax? Personally, I can't imagine how that's
possible.

Thanks.

Yong Huang

K Gopalakrishnan <kaygopal_at_yahoo.com> wrote:
> <INSERT STANDARD DISCLAIMERS>
>
> Yes. You can use INTERNAL_USE keyword to convert the database character
set.
> I think there is a utility called 'csscan' character set scanner which
can
> be
> used to determine the possibility of the INTERNAL_USE conversion.
>
> <END DISCLAIMERS>
>
>
> Best Regards,
> K Gopalakrishnan
>
>
>
>
> -----Original Message-----
> Yong Huang
> Sent: Tuesday, November 18, 2003 9:00 AM
> To: Multiple recipients of list ORACLE-L
>
>
> Gopal,
>
> Are you saying with an undocumented parameter or command, I can alter
> database
> (national) character set us7ascii even if my current (national) character
> set
> is utf8?
>
> Yong Huang
>
> --- K Gopalakrishnan <kaygopal_at_yahoo.com> wrote:
> > INTERNAL_USE is an keyword (to enable an undocumented feature) in ALTER
> > DATABASE
> > command. THis can be used to convert the database character set if the
> > existing
> > char set (national charset) is the superset of the db charset. You can
> just
> > run
> > the ALTER Database command to convert the db charset.
> >
> >
> >
> > Best Regards,
> > K Gopalakrishnan
> >
> >
> >
> >
> > -----Original Message-----
> > Barry Deevey
> > Sent: Tuesday, November 18, 2003 7:09 AM
> > To: Multiple recipients of list ORACLE-L
> >
> >
> > As of yet I'm unsure how the application would be affected if I rename
the
> > role - I need to do some investigation.
> >
> > I tried this in Oracle 8 and it worked fine - It just seems to be
oracle 9
> > that doesn't like it.
> >
> > I've also checked v$reserved_words and INTERNAL is not listed,
> INTERNAL_USE
> > and INTERNAL_CONVERT are. As a test I created roles for INTERNAL_USE
and
> > INTERNAL_CONVERT, hoping that it would not allow me to create them, but
it
> > did, so I then ran the grant again and it also allowed it.
> >
> > Now I'm really confused!!

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Author: Yong Huang
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Author: Thomas Day
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Received on Tue Nov 18 2003 - 12:34:25 CST