Etsuro Fujita wrote: > On 2016/01/28 12:13, Robert Haas wrote: > >I don't think this is a good idea. Most of the time, no system > >columns will be present, and we'll just be scanning the Bitmapset > >twice rather than once. Sure, that doesn't take many extra cycles, > >but if the point of all this is to micro-optimize this code, that > >particular change is going in the wrong direction. > > I thought that is a good idea, considering the additional overhead is > little, because that would be useful for some use-cases. But I think we > need more discussions about that, so if there are no objections from Alvaro > (or anyone), I'll leave that part as-is.
I'm happy to defer. -- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
