Tom Lane wrote:
> I'll comment on the other issues later ... but I will say that I don't
> think it's acceptable to add *any* overhead to standard-SQL queries
> in order to support inheritance better. The vast majority of our users
> want SQL performance and don't give a damn about inheritance. We have
> to pay attention to that.
Well I see that pg_class has columns like "relhasindex". If we added a
"relhassubclass", the overhead should be unmeasureable.