On Fri, Jun 29, 2012 at 2:48 PM, Richard Hipp <d...@sqlite.org> wrote:
> On Fri, Jun 29, 2012 at 3:40 PM, Nico Williams <n...@cryptonector.com > >wrote: > > > So, if I understand section 3.2 of the SQLite4 design page then it > > will often be the case that lookup keys will not be stored in an order > > that will be useful for optimizing common ORDER BY expressions. Is > > this correct? > > > Not correct. The keys are encoded (see > http://www.sqlite.org/src4/doc/trunk/www/key_encoding.wiki) in a way that > causes a lexicographical ordering of the keys to correspond to what the > user wants out of ORDER BY. So indices can still be used for fulfilling > ORDER BY. > What is the rationale for the 7-bit BINARY encoding? The performance impact will surely outweigh any convenience of being able to treat blobs as 0-terminated strings. -- Cory Nelson http://int64.org _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
