On Wed, Oct 28, 2015 at 6:29 PM, SQLite mailing list < sqlite-users at mailinglists.sqlite.org> wrote:
> On 10/28/2015 7:25 PM, SQLite mailing list wrote: > >> On 28 Oct 2015, at 11:23pm, SQLite mailing list < >> sqlite-users at mailinglists.sqlite.org> wrote: >> >> This can't possibly work. "Fuzzy equality" is not transitive (x is close >>> enough to y, y is close enough to z, but x is just far enough from z to be >>> non-equal), which would break any indexing scheme. >>> >> >> Oh crumbs. You're right. I didn't think of it like that. Is there a >> way to do it correctly ? >> > > None that I know of. Which is probably why no DB engine is doing anything > like this. It's probably why some have explicit decimal numeric types available. Often in a database engine the overhead of a manual math implementation is not the dominant factor in performance. -scott
