The rule-system seems to evaluate a functional value
of a column anew. Please confim if this is a
documented/intentional behaviour of the rule system?
The order of evaluation of the expresion(s) within
original statemant and rule differ between "on insert"
and "on update" rules.
For details see
Thanks Tom,
Refering to your answer: The syntax "NEW.column" seems
to hint rather to "the new value" of column as opposed
to "the expression for the new value", c.f.
"OLD.column". The fact that the order of evaluation
changes underlines the inconsistency; the order of
evaluation would not matter
