Don’t rely on the data producers Even if you think a query will never have more than a handful of results, beware: it could change without warning because of some other part of the system. The only sensible numbers are “zero,” “one,” and “lots,” so unless your query selects exactly one row, it has the potential to return too many. Don’t rely on the data producers to create a limited amount of data. Sooner or later, they’ll go berserk and fill up a table for no reason, and then where will you be?
