On Sun, Nov 25, 2012 at 04:56:44PM +0000, Simon Slavin scratched on the wall: > > On 25 Nov 2012, at 1:29pm, Paul Sanderson <sandersonforens...@gmail.com> > wrote: > > > I underastand that ecvery coumn needs to be read, that is self evident, > > however my feeling (not tested) is that the process is much slower than it > > needs to be, i..e the process of creating an index on a column whos values > > are all NULL takes longer than just reading all of the columns - I have to > > admit to not testing/timimg this though, I'll have a go when time permits. > > In SQLite, all columns are in all indexes even if the column contains a > NULL. NULL has a sorting order, and anything that does
Rows, Simon, rows... not columns. Watch your terminology or your answers will be more confusing than the questions. -j -- Jay A. Kreibich < J A Y @ K R E I B I.C H > "Intelligence is like underwear: it is important that you have it, but showing it to the wrong people has the tendency to make them feel uncomfortable." -- Angela Johnson _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
