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?
On Sun, Mar 18, 2012 at 6:38 PM, Daniel Farina <dan...@heroku.com> wrote: > On Sat, Mar 17, 2012 at 8:48 PM, HuangQi <huangq...@gmail.com> wrote: > > About the second topic, so currently TABLESAMPLE is not implemented > > inside Postgres? I didn't see this query before, but I googled it just > now > > and the query seems very weird and > > interesting. > http://www.fotia.co.uk/fotia/DY.18.TheTableSampleClause.aspx > > Still, do you have any mail thread talking about this? > > I think there may be a few, but there's a nice implementation plan > discussed by Neil Conway and written into slides from a few years ago: > > http://www.pgcon.org/2007/schedule/attachments/9-Introduction_to_Hacking_PostgreSQL_Neil_Conway.pdf > > He also had his implementation, although at this point some of the > bitrot will be intense: > > http://www.neilconway.org/talks/hacking/ > > I also seem to remember writing this (to some degree) as a student as > part of a class project, so a full-blown production implementation in > a summer sounds reasonable, unless someone has thought more about this > and ran into some icebergs. I'm not sure exactly what the blockers > were to this being committed back in 2007 (not to suggest there > weren't any). > > I haven't thought enough about skipscan, but there a number more > unknowns there to me... > > -- > fdr > -- Best Regards Huang Qi Victor