t.DB_KEYEMPTY" class="olink">DB_KEYEMPTY</a> error in some 
    cases when called on Queue and Recno databases.  Unfortunately, this was undocumented 
    behavior.
</p>
      <p>
    For consistency with the other Berkeley DB methods that handle
    <a href="../programmer_reference/program_errorret.html#program_errorret.DB_KEYEMPTY" class="olink">DB_KEYEMPTY</a>, this is no longer the case.  Applications calling the
    <a href="../api_reference/CXX/dbdel.html" class="olink">Db::del</a> and Java
    <code 