Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2015-04-01 13:29:33 -0400, Tom Lane wrote:
>> WHEN won't help; if there are any INSTEAD OF triggers, no insert will
>> happen, whether the triggers actually fire or not.
> Well, right now it doesn't work at all. It seems pretty reasonable to
> define things so that the insert happens normally if there's no matching
> INSTEAD OF trigger.
It would absolutely *not* be reasonable for WHEN conditions for triggers
on tables to work completely differently than they do for triggers on
views. That ship's sailed.
regards, tom lane