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.

Yes, but how do you keep that accurate?  If I add indexes, then drop
them, does relhasindex go to false.  Could you do that for relhassubclass?

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