ction, if it is a built-in type, or
       <code class="literal">ARRAY</code> if it is some array (in that case, see
       the view <code class="literal">element_types</code>), else
       <code class="literal">USER-DEFINED</code> (in that case, the type is
       identified in <code class="literal">type_udt_name</code> and associated
       columns).  Null for a procedure.
      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
       <code class="structfield">character_maxim