> On Mon, Mar 19, 2012 at 6:17 PM, Josh Berkus <j...@agliodbs.com> wrote: > > On 3/18/12 8:11 PM, HuangQi wrote: > >> The implementation seems to be done quite fully. There is even a patch > >> file. Why is the implementation not added into the release of Postgres? As > >> so much has already being done, what could I do in this case for the Gsoc? > > > > That would be good for you to research. archives.postgresql.org will > > help you find the discussions around that. > > I actually tried to find out, personally...not sure if I was searching > wrongly, but searching for TABLESAMPLE did not yield a cornucopia of > useful conversations at the right time in history (~2007), even when > the search is given a broad date-horizon (all), so I, too, an > uninformed as to the specific objections. > > http://www.postgresql.org/search/?m=1&q=TABLESAMPLE&l=&d=-1&s=d >
I sent a mail to Nail Conway asking him about this. Hope he could give a good answer. While waiting for the response, how about the skip scan? Daniel mentioned there is still some unknown.I searched this mail thread suggesting the skip scan to TODO list. http://archives.postgresql.org/pgsql-bugs/2010-03/msg00144.phpAlso this thread talking about http://archives.postgresql.org/pgsql-hackers/2010-03/msg00328.php Not sure whether this is feasible for Gsoc.... Best RegardsHuang Qi Victor
