Re: [HACKERS] Re: [SQL] Proposed Changes to PostgreSQL - Mailing list pgsql-sql

Taral wrote:
> 
> On Thu, 3 Feb 2000, Tom Lane wrote:
> 
> > Maintaining an accurate count of descendants (or indexes for that
> > matter) would be expensive; in particular, it'd create severe
> > concurrency problems.
> 
> What about fixing these things on VACUUM then?

It could produce wrong results to queries if the data is wrong.