This is why you want to use SQL databases quite conservatively. Nearly every product I've seen that heavily leverages SQL has been an unportable mess. ... then

This is why you want to use SQL databases quite conservatively. Nearly every product I've seen that heavily leverages SQL has been an unportable mess. ... then you hit the performance wall, and say, "Well, just /one/ of these little features won't hurt, right?" And a year later you're singing the blues. Standards should be executable.