        that relation for reuse only within that relation unless explicitly
         freed (for example, with <code class="command">VACUUM FULL</code>).
        </p><p>
         This setting does not attempt to guarantee that an error will be
         generated under any particular circumstances.  In fact, if the
         correct results can be generated from (for example) a cursor which
         has materialized a result set, no error will be generated even if the
         underlying rows in the referenced