Re: [HACKERS] Re: [SQL] Proposed Changes to PostgreSQL

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.