Hi,

I have a table with a field for which i need a default value. My problem
is the default value can change at any time. So the solution I found is
to use a "before insert" trigger.

But now, i'm facing a new challenge: how to detect if the null status I
received in new.myfield is because the field was not in the insert
statement or because the insert statement set it to null ?

well, from
insert into mytable (field1) values (:field1)
or from
insert into mytable (field1, myfield) values (:field1, null)