What's your opinion on using UUIDs as database row identifiers, particularly in web apps?

Question

I\'ve always preferred to use long integers as primary keys in databases, for simplicity and (assumed) speed. But when using a REST or Rails-like URL scheme for object insta

Answer 1

Rather than URLs like this:

http://example.com/user/783

Why not have:

http://example.com/user/yukondude

Which is friendlier to humans and doesn't leak that tiny bit of information?