Re: A trigger vs. "default value" in a table

Peter thanks.

I forgot that null insert is not converted to the default.

Yechiel Adar
Mehish
----- Original Message -----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Sent: Monday, May 13, 2002 11:03 PM

> Hello Andrey
>
> The correct answer depends on what you want !
> if you can live with null values in the column then
> a default for the column is OK, but if you want to
> handle a insert with a null then you need a trigger.
> Se the little example :
>
> SQL> create table t (a number, b number default 10);
>
> Table created.
>
> SQL> insert into t (a) values (10);
>
> 1 row created.
>
> SQL> commit;
>
> Commit complete.
>
> SQL> select * from t;
>
> A B
> ---------- ----------
> 10 10
>
> SQL> insert into t (a,b) values (10, null);
>
> 1 row created.
>
> SQL> commit;
>
> Commit complete.
>
> SQL> select * from t;
>
> A B
> ---------- ----------
> 10 10
> 10
>
>
>
> Yechiel Adar wrote:
>
> >Hello Andrey
> >
> >KISS - Why write code to do what oracle does for you?
> >
> >Yechiel Adar
> >Mehish
> >----- Original Message -----
> >To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> >Sent: Monday, May 13, 2002 6:23 PM
> >
> >
> >>Dear list !
> >>I need a very simple thing : each time a certain field is null during an
> >>insert, to substitiute a string "AAA" instead.
> >>What is better : to write a trigger to do so or to define a default
value
> >>for that column in the table ?
> >>Thanks !
> >>
> >>
> >>DBAndrey
> >>
> >>* 03-9254520
> >>* 058-548133
> >>* mailto:andreyb_at_elrontelesoft.com
> >>
> >>
> >>
> >>
> >>--
> >>Please see the official ORACLE-L FAQ: http://www.orafaq.com
> >>--
> >>Author: Andrey Bronfin
> >> INET: andreyb_at_elrontelesoft.com
> >>
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> --
>
> /regards
>
> Peter Gram
>
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>
>
>
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> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Peter Gram
> INET: peter.gram_at_miracleas.dk
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Yechiel Adar
  INET: adaryechiel_at_hotmail.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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