On Tue, Sep 22, 2015 at 11:56 PM, Alvaro Herrera <alvhe...@2ndquadrant.com> wrote:
> Tom Lane wrote: > > > Should we consider this HEAD-only, or a back-patchable bug fix? > > Or perhaps compromise on HEAD + 9.5? > > It looks like a bug to me, but I think it might destabilize approved > execution plans(*), so it may not be such a great idea to back patch > branches that are already released. I think HEAD + 9.5 is good. > > (*) I hear there are even applications where queries and their approved > execution plans are kept in a manifest, and plans that deviate from that > raise all kinds of alarms. I have never seen such a thing ... > Ugh. Anyway, do you expect any plans to change only due to avg. width estimation being different? Why would that be so? -- Alex
