RE: db file sequential read [WAS:wait event puzzler]

> I do agree with you. But some times we may need go beyond the scopes.
>
> For testing purpose we can do these kind of R&D's.

Did you try to go "beyond the scopes"? I tried this on a trashable DB (8.1.7).

SQL*Plus: Release 8.1.7.0.0 - Production on Thu Jun 12 20:30:32 2003

(c) Copyright 2000 Oracle Corporation. All rights reserved.

SQL> alter table col$ modify name varchar2(60); alter table col$ modify name varchar2(60) *
ERROR at line 1:
ORA-00701: object necessary for warmstarting database cannot be altered

<Docs>
ORA-00701 object necessary for warmstarting database cannot be altered

Cause: An attempt was made to alter or drop a database object (table, cluster,
or index) defined in the control file's bootstrap segment and needed to warm start the database.
</Docs>

What procedure lets you do that when Oracle doesn't allow this SQL to be issued?

Please send me the procedure you were referencing in one of your previous posts.

Regards
Naveen

> -----Original Message-----
> From: Senthil Kumar D [mailto:[EMAIL PROTECTED]
> Sent: Thursday, June 12, 2003 9:00 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: db file sequential read [WAS:wait event puzzler]
>
>
>
> Nothing wrong in this.
>
> Senthil.
>
> -----Original Message-----
> CP
> Sent: Thursday, June 12, 2003 7:10 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Modifying data dictionary tables is definitely not a good idea and I
> am sure Oracle will not support this.
>
> CP
>
>
> [EMAIL PROTECTED] wrote:
>
> >Dear Bhaskar,
> >
> >You can modify col$.NAME to varchar2(60) and try.
> >
> >If this fails, I'll give a procedure you can use that to change it to
> >whatever size you want.
> >
> >Senthil Kumar
> >Sr Oracle DBA
> >Summitworks Technologies Pvt Ltd
> >
> >-----Original Message-----
> >Bhaskar Viswanathan
> >Sent: Thursday, June 12, 2003 4:00 PM
> >To: Multiple recipients of list ORACLE-L
> >
> >
> >
> >hi,
> >
> >We use Oracle 8 DB.
> >
> >I am not a Oracle technical guy. So lemme try explaining the problem.
> >
> >We need to create tables with columns, whose names(column-names) are
> >more than 30 characters long.
> >This is being restricted because, all columns of all tables
> have entries
> >in a table called 'col'.
> >Thit table is defined as:
> >
> >SQL> desc col
> > Name Null? Type
> > ----------------------------------------- --------
> >----------------------------
> > TNAME NOT NULL VARCHAR2(30)
> > COLNO NOT NULL NUMBER
> > CNAME NOT NULL VARCHAR2(30)
> > COLTYPE VARCHAR2(106)
> > WIDTH NOT NULL NUMBER
> > SCALE NUMBER
> > PRECISION NUMBER
> > NULLS VARCHAR2(19)
> > DEFAULTVAL LONG
> > CHARACTER_SET_NAME VARCHAR2(44)
> >SQL>
> >
> >since CNAME is defined as VARCHAR2(30), we are forced to
> retrict column
> >names to a max of 30 characters long.
> >
> >For eg. create table T1(xxxxxxxxxxxxxxxxxxxxxxxxxxxxx31
> varchar2(50));
> >The above statement will be rejected with the error:
> > *
> >ERROR at line 1:
> >ORA-00972: identifier is too long
> >
> >However, the statement "create table
> T1(xxxxxxxxxxxxxxxxxxxxxxxxxxxx30
> >varchar2(50))"
> >Succeeds in creating the table;
> >
> >I guess this table col is created by the system itself. how can we
> >change this size
> >So that the 30 character restriction in column names can be
> avoided???
> >
> >baski
> >
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Author: Naveen Nahata
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