Andreas Tille <tillea@rki.de> writes:
>> NEW.ChangedAt := timestamp(''now'');
> This avoids the error message, but doesn't have any effect to the value
> of ChangedAt. It just remains the same as CreatedAt :-(.
I think you are getting burnt by premature constant folding --- see
nearby discussion of how to define a column default that gives the
time of insertion. You need to write this asNEW.ChangedAt := now();
to prevent the system from reducing timestamp('now') to a constant
when the function is first executed.
regards, tom lane
