Doug McNaught <doug@mcnaught.org> writes:
> The only reason PG views aren't
> updateable by default is (AIUI) a lack of agreement on how they should
> work for complex view definitions.
Actually I think it's more that no one has felt like tackling it. The
SQL spec only requires views to be updatable when they are "sufficiently
simple", and it turns out that the spec's constraints on "sufficiently
simple" eliminate all the doubtful cases.
regards, tom lane