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?