This method is also more performant than putting the code in a trigger
and selecting from dual.
Jared
Alan Davey <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
03/10/2003 01:15 PM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Re: Sequence as column default
You could also do it as part of your insert statement if you didn't want
to use a trigger.
INSERT INTO employees
VALUES (employees_seq.nextval, 'John', 'Doe', 'jdoe',
'555-1212', TO_DATE(SYSDATE), 'PU_CLERK', 2500, null, null,
30);
Same thing goes with currval also.
--
Alan Davey
[EMAIL PROTECTED]
718-482-4200 x106
On 3/10/2003 3:49 PM, DENNIS WILLIAMS <[EMAIL PROTECTED]> wrote:
>Has anyone defined a sequence as the default value for a column? The
>manual
>is a little ambiguous (in my mind anyway):
>
>In the 8.1.7 manual:
>Restriction: A DEFAULT expression cannot contain references to other
>columns, the pseudocolumns CURRVAL, NEXTVAL, LEVEL, and ROWNUM, or
>date
>constants that are not fully specified.
>
>In 9i this was altered to read:
>Restriction on Default Column Values
>A DEFAULT expression cannot contain references to PL/SQL functions
>or to
>other columns, the pseudocolumns LEVEL, PRIOR, and ROWNUM, or date
>constants
>that are not fully specified.
>
>SQL> alter table test add
> 2 (col3 number default addressID.NextVal);
>(col3 number default addressID.NextVal)
> *
>ERROR at line 2:
>ORA-00984: column not allowed here
>
>The alternative is to use an insert trigger, but it seems this would
>be more
>efficient. Since we are planning to use this a LOT, I thought I should
>try
>for a definate answer. Thanks for your patience.
>
>Dennis Williams
>DBA, 40%OCP, 100% DBA
>Lifetouch, Inc.
>[EMAIL PROTECTED]
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