</td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
       <code class="structfield">objsubid</code> <code class="type">int4</code>
      </p>
      <p>
       For a security label on a table column, this is the column number (the
       <code class="structfield">objoid</code> and <code class="structfield">classoid</code> refer to
       the table itself).  For all other object types, this column is
       zero.
      </p></td></tr><tr><td class="catalog_table_entry"><p class="column