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

From: CP <csp2201_at_netscape.net>
Date: Thu, 12 Jun 2003 06:02:17 -0700
Message-ID: <F001.005B0093.20030612053939@fatcity.com>

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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Received on Thu Jun 12 2003 - 08:02:17 CDT