On Fri, May 17, 2013 at 11:02 AM, GB <gbi...@web.de> wrote: > > Richard Hipp schrieb am 17.05.2013 16:37: > > Collating orders and affinities might be disqualifying the constraint on >> "id" from being used with the index. >> > It just came to my mind that "id" is an INTEGER PRIMARY KEY column and as > such is part of every index anyway. Could it be that the additional "id" > part of that index is silently ignored in this case? >
Yes. If "id" is the INTEGER PRIMARY KEY then that messes up everything. Don't do that. Change the index to omit the "id" and you'll get better results. Furthermore, the "id" is unique so if there is a constraint on the "id" the query planner will always use that constraint to look up the rows in the table directly, rather than going through an index, since doing so will be about twice as fast as using an index. -- D. Richard Hipp d...@sqlite.org _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
