On Fri, 2008-07-18 at 09:17 -0400, Ivan Krstić wrote: > Indeed. Pat Helland's paper on the matter is well worth a read: > > <http://www-db.cs.wisc.edu/cidr/cidr2007/papers/cidr07p15.pdf> And Pat, of all people, would know from intimate and extensive personal experience. shap