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

Updating a data dictionary is simply not done. Remember, we're the DBA (you will be assimilated) and not fun loving students who can play with their alma mater's equipment. Updating the data dictionary directly would cause the database to lose support from Oracle Corp. and the perpetrator would be liable. If you want to practice turning your car around by using the emergency brake, don't do it with the company car.
Other then that, updating the data dictionary directly is simply bad manners.

Mladen Gogala
Oracle DBA
Phone:(203) 459-6855
Email:[EMAIL PROTECTED]

-----Original Message-----
Sent: Thursday, June 12, 2003 9:59 AM
To: Multiple recipients of list ORACLE-L

he is talking about altering the column in the data dictionary. Ive updated TS$ myself and its not that big of a deal.

id be a bit concerned about actually altering a column. Oracle may have some underlying code that you dont know about that assumes a maximum column length = 30 or there is some modelling reason for the limit also.
>
> From: "Naveen Nahata" <[EMAIL PROTECTED]>
> Date: 2003/06/12 Thu AM 08:49:22 EDT
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: RE: db file sequential read [WAS:wait event puzzler]
>
> What??????????????????????
>
> > -----Original Message-----
> > From: Senthil Kumar D [mailto:[EMAIL PROTECTED]
> > Sent: Thursday, June 12, 2003 5:05 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject: RE: db file sequential read [WAS:wait event puzzler]
> >
> >
> > 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: Bhaskar Viswanathan
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Author: Gogala, Mladen
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