On 2016-07-17 08:32:17 -0400, Robert Haas wrote: > On Wed, Jul 13, 2016 at 11:06 PM, Andres Freund <and...@anarazel.de> wrote: > > The major issue with the simplehash implementation in the path is > > probably the deletion; which should rather move cells around, rather > > than use toombstones. But that was too complex for a POC ;). Also, it'd > > likely need a proper iterator interface. > > Do we ever need to delete from a TIDBitmap? Probably not, but I'm > guessing you have other uses for this in mind.
We do, via BitmapAnd. > > FWIW, the dynahash usage in nodeAgg.c is a major bottleneck in a number > > of other queries. > > Can we use this implementation for that as well, or are we going to > need yet another one? I've not tested it, but I'd assume that something like the simplehash should work there. It's a bit more complicated of a scenario though. Andres -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers