Andrew Dunstan <andrew.duns...@2ndquadrant.com> writes: > On 06/18/2018 06:12 PM, Tom Lane wrote: >> Anyway, if we do it with a GUC, the user can control the scope of >> the effects.
> Yeah, but Peter makes the case that people want it for global > experimentation. "We think we can safely drop this humungous index that > would take us days to rebuild, but before we do let's make it invisible > and run for a few days just to make sure." I guess we could do that with > a GUC, but it seems ugly. I find it hard to believe that it's uglier than what you suggested... and it also does more, and is easier to implement. regards, tom lane