available in <span class="productname">PostgreSQL</span>
      </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
       <code class="structfield">schema_level_routine</code> <code class="type">yes_or_no</code>
      </p>
      <p>
       Always <code class="literal">YES</code> (The opposite would be a method
       of a user-defined type, which is a feature not available in
       <span class="productname">PostgreSQL</span>.)
      </p></td></tr><tr><td class="catalog_table_ent