On Sat, Feb 16, 2019 at 03:10:44PM -0800, Donald Dong wrote: > Hi, > > When explaining a query, I think knowing the actual rows and pages > in addition to the operation type (e.g seqscan) would be enough to > calculate the actual cost. The actual cost metric could be useful > when we want to look into how off is the planner's estimation, and > the correlation between time and cost. Would it be a feature worth > considering?
As someone not volunteering to do any of the work, I think it'd be a nice thing to have. How large an effort would you guess it would be to build a proof of concept? Best, David. -- David Fetter <david(at)fetter(dot)org> http://fetter.org/ Phone: +1 415 235 3778 Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate
