Claudio Freire wrote:

> On Fri, Apr 6, 2018 at 11:00 AM, Alvaro Herrera <> 
> wrote:

> > FWIW I liked the idea of having this abstraction possibly do other
> > things -- for instance to vacuum brin indexes you'd like to mark index
> > tuples as "containing tuples that were removed" and eventually
> > re-summarize the range.  With the current interface we cannot do that,
> > because vacuum expects brin vacuuming to ask for each heap tuple "is
> > this tid dead?" and of course we don't have a list of tids to ask for.
> > So if we can ask instead "how many dead tuples does this block contain?"
> > brin vacuuming will be much happier.
> I don't think either patch gives you that.
> The bulkdelete interface is part of the indexam and unlikely to change
> in this patch.

I'm sure you're correct.  I was just saying that with the abstract
interface it is easier to implement what I suggest as a follow-on patch.

Álvaro Herrera      
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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