On Sep 19, 2008, at 5:47 PM, Russ Leighton wrote: > > Observation 1: Group by (in my case) is faster w/out using the index > than with using the index by 10X > > In my app I have a table- > > create table foo(k1integer ,k2 integer,k3 integer,...); > create index foo_idx on foo(k1,k2,k3); > > when I do- > > select k1,k2,sum() as s,count(1) as c from foo group by k1,k2; > > The query is 10X slower with the above index created as when I drop > the index and don't use it. Bug or > just happens to be the case for some data distribution this is just > the way it is? Yes, I know I have > a 3 column index and only using 2 for this query.
I do not see how it is possible for what you say to be true - unless you have omitted important details of your query, such as a WHERE clause. What is the argument to sum(), btw? You should get an error, I think. D. Richard Hipp [EMAIL PROTECTED] _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
