&gt; &gt; I'm puzzled by this perspective.  On the one hand, you've
&gt; &gt; &gt; &gt; been making an
&gt; &gt; &gt; &gt; efficiency claim that one can't have too many sorts of
&gt; &gt; &gt; &gt; constraint checks on
&gt; &gt; &gt; &gt; a DB because it's too inefficient.  On the other hand you
&gt; &gt; &gt; &gt; offer &quot;eyeball
&gt; &gt; &gt; &gt; the resultant data&quot; as a solution, which I would think would
&gt; &gt; &gt; &gt; be impractical
&gt; &gt; &gt; &gt; if the data set is so large that a