On 2/6/19 10:59 PM, David Rowley wrote: > On Thu, 7 Feb 2019 at 03:16, Alvaro Herrera <alvhe...@2ndquadrant.com> wrote: >> I wonder what should we be doing with this series -- concretely, should >> the effort concentrate on one of the two patches, and leave the other >> for pg13, to increase the chances of the first one being in pg12? I >> would favor that approach, since it's pretty late in the cycle by now >> and it seems dubious that both will be ready. > > I mostly have been reviewing the MCV patch with the thoughts that one > is better than none in PG12. I don't see any particular reason that > we need both in the one release. >
I agree with that, although most of the complexity likely lies in integrating the stats into the selectivity estimation - if we get that right for the MCV patch, adding histogram seems comparably simpler. But yeah, let's focus on the MCV part. regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
