, but the
         overhead is paid once per query rather than once per row, so this
         method might be advantageous for bulk-insert situations.  In most
         cases, however, the trigger method will offer better performance.
        </p><p>
         Be aware that <code class="command">COPY</code> ignores rules.  If you want to
         use <code class="command">COPY</code> to insert data, you'll need to copy into the
         correct child table rather than directly into the root. <code class="com