LOBS triggers and :new

Question

The 9i (rel 1) documentation says you cannot read :new.lobcol in an after row trigger. I tried it becasue I had already written the code and I was able to read it. Is the documentation wrong or is there a loop hole? If it is a loop hole how big is it? Why is there a restriction?
Here is a simple test I ran in sql/plus
create table bill (c clob);
create table h_bill (ts date,action_cd varchar2(3), c clob);
1 create or replace trigger por_bill
2 after insert or update or delete on bill for each row
3 declare
4 c1 clob;
5 v varchar2(200);
6 begin
7 if inserting or updating then
8 v := dbms_lob.substr (:new.c,100,1);
9 end if;
10 if inserting then
11 dbms_output.put_line ('Inserting');
12 dbms_output.put_line (v);
13 insert into h_bill (ts,c,action_cd) values (sysdate,:new.c,'INS');
14 elsif updating then
15 dbms_output.put_line ('Updating');
16 dbms_output.put_line (v);
17 insert into h_bill (ts,c,action_cd) values (sysdate,:new.c,'UPD');
18 else
19 dbms_output.put_line ('Deleting');
20 insert into h_bill (ts,action_cd) values (sysdate,'DEL');
21 end if;
22* end;
SQL> /
Trigger created.
SQL> insert into bill values ('AAAAA');
Inserting
AAAAA
1 row created.
SQL> select * from h_bill;
TS C ACT
26-APR-02 AAAAA INS

Answer 1

Hi,
For old column values, You can directly select values from "deleted". You can refer to the new values using "inserted", like
CREATE TRIGGER trgAfterInsert ON [dbo].[Employee_Test]
FOR INSERT
AS
declare @empid int;
declare @empname varchar(100);
declare @empsal decimal(10,2);
declare @audit_action varchar(100);
select @empid=i.Emp_ID from inserted i;
select @empname=i.Emp_Name from inserted i;
select @empsal=i.Emp_Sal from inserted i;
set @audit_action='Inserted Record -- After Insert Trigger.';
insert into Employee_Test_Audit
(Emp_ID,Emp_Name,Emp_Sal,Audit_Action,Audit_Timestamp)
values(@empid,@empname,@empsal,@audit_action,getdate());
PRINT 'AFTER INSERT trigger fired.'
GO
Read
Sql server trigger
And the way to select from "deleted" is the same as the above one (that is to select from "inserted").
Many Thanks & Best Regards, Hua Min