div><h2 class="title" style="clear: both">74.3. Subtransactions <a href="#SUBXACTS" class="id_link">#</a></h2></div></div></div><p>
   Subtransactions are started inside transactions, allowing large
   transactions to be broken into smaller units.  Subtransactions can
   commit or abort without affecting their parent transactions, allowing
   parent transactions to continue. This allows errors to be handled
   more easily, which is a common application development pattern.
   The word subtransaction is oft