On Tue, Dec 10, 2013 at 7:49 PM, Peter Geoghegan <p...@heroku.com> wrote: >> Back in 2005/6, I advocated a block sampling method, as described by >> Chaudri et al (ref?) > > I don't think that anyone believes that not doing block sampling is > tenable, fwiw. Clearly some type of block sampling would be preferable > for most or all purposes.
We do block sampling now. But then we select rows from those blocks uniformly. Incidentally, if you mean Surajit Chaudhuri, he's a Microsoft Research lead so I would be nervous about anything he's published being patented by Microsoft. -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
