Instead of trigger on view with CLOB data

Question

I have writed Instead of trigger for view "article(id,text)" with CLOB
field "text".
create or replace trigger v_article_insert
instead of insert on v_article
for each row
declare
begin
insert into article(id,text) values(id,:new.text);
end v_article_insert;
When I try to do DML (insert, update), forexample:
insert into v_article(text) values('bla-bla')
I get:
ORA-25008 no implicit conversion to LOB datatype in instead-of trigger.
( Cause: When inserting or updating a view using instead-of trigger, the
new value for a LOB view column is of a different datatype.
Action: Specified a LOB value as the new value for the LOB view
column.)
insert into v_article(text) values(empty_clob()) - It works...
What does it mean and what is right syntax for DML for CLOB fields in
instead of triggers?

Answer 1

When inserting CLOBs you create the row with an Empty_Clob() to initialize the CLOB field. Then you can update the empty CLOB with your CLOB value.
The error message is telling you that Oracle will not convert your CLOB to the initialization value needed.