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@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] 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@xxxxxxxxx>
Date: 5-mag-2006 14.40
Subject: Re: updating problems
To: Ghassan Salem <salem.ghassan@xxxxxxxxx>


2006/5/5, Ghassan Salem <salem.ghassan@xxxxxxxxx>:
> 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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