To be fair, a SIGMOD paper is much more detailed than a white paper. But perhaps you said that because the Google page only links to the presentation from the conference, not the paper itself. You can find that here: http://dl.acm.org/citation.cfm?id=2213954
edit: oddly, it appears that the "full-text" pdf that the ACM has is just the abstract. So I can't get at the full paper, either. Sorry about that.
It's an industrial presentation. As such, there's no paper about it, just the talk given at SIGMOD and the slides. When Google unveiled Megastore, F1 predecessor, it did it as an industrial presentation too. Years, and many improvements later, they published a paper on Megastore.
edit: oddly, it appears that the "full-text" pdf that the ACM has is just the abstract. So I can't get at the full paper, either. Sorry about that.