Обсуждение: trigger update delete

I am trying to write a trigger function that will do something when either a
row had been deleted or a field has been updated to null.

The problem I am having is determining in the function if this is a delete
or not. I would like to say:
if this is delete trigger or new.field1 is null then
    ...
end if

new.field1 dies when it is a delete trigger, as it is supposed to. But I
need the function to know the difference.

Any thoughts?

I found the TG_OP variable which tels me which operation is currently being
done.

"Sim Zacks" <sim@compulab.co.il> wrote in message
news:da83sd$1i7g$1@news.hub.org...
> I am trying to write a trigger function that will do something when either
a
> row had been deleted or a field has been updated to null.
>
> The problem I am having is determining in the function if this is a delete
> or not. I would like to say:
> if this is delete trigger or new.field1 is null then
>     ...
> end if
>
> new.field1 dies when it is a delete trigger, as it is supposed to. But I
> need the function to know the difference.
>
> Any thoughts?
>
>