RE: updating problems

First, you should do this in "before" trigger. Second, you don't need "update" statement in the trigger (just do an "assignment").  

create or replace trigger my_trig

   before update of a on tab for each row    begin

      :new.b = current_timestamp;
   end;
/

And third, read some oracle docs.

Igor

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Simone Saravalli Sent: Friday, May 05, 2006 8:42 AM
To: oracle-l
Subject: Fwd: updating problems

• Forwarded message ---------- From: Simone Saravalli <s.saravalli_at_gmail.com> Date: 5-mag-2006 14.40 Subject: Re: updating problems To: Ghassan Salem <salem.ghassan_at_gmail.com>

2006/5/5, Ghassan Salem <salem.ghassan_at_gmail.com>:
> Simone,
> Can you post the code of your trigger?

Yes, this is an example of the table I want to update:

create table tab (

   a number not null,
   b date default current_timestamp
);

and then the trigger

create or replace trigger my_trig

   after update of a on tab for each row    begin

      update tab set b = current_timestamp where a=:new.a;    end;
/

Now I've written:

create or replace trigger my_trig

   after update of a on tab for each row    begin

      update tab set :new.b = current_timestamp where a = :new.a;    end;
/

but the trigger gets some compilation errors. Is it correct?

Thanks, Simone Saravalli

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