On Thu, Oct 11, 2012 at 7:09 AM, Hamish Symington <ham...@lightbluesoftware.com> wrote: >> Note that I was mistaken earlier when I said that "X=Y" and "Y=X" should >> result in the same answer. If X and Y have different default collating >> sequences, then X=Y does not mean the same thing as Y=X and so the answers >> can be different. > Right, I understand. Perhaps a brief note on the docs for the query optimizer > to remind people of this might be worth it - it seems slightly > counterintuitive, from a 'normal' user's point of view.
Usage of appropriate collating function is not an optimizer feature, it's property of SQLite data types. And it's well documented here http://www.sqlite.org/datatype3.html (see section 6.1). Whether optimizer chooses to use index or not depending on collating function is also well documented. Pavel _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
