On 4/5/2011 6:59 PM, Eric Promislow wrote: > Notice the clause in the middle of the query: > and (substr(p2.path, length(p1.path) + 1, 1) = "/" > or substr(p2.path, length(p1.path) + 1, 1) != "/") > > If I comment out this full clause, the query returns the expected result > set. > > But if I leave it uncommented, the query returns an empty set. But the > clause > should be tautologically true -- either the character after the prefix is > "/" or it > isn't.
The third possiblity is that substr() returns null, in which case both comparisons will be false. -- Igor Tandetnik _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
