Mine

 case 'pgsql':
      db_query("CREATE TABLE {node_field_nodereference_data} (
          vid integer unsigned NOT NULL default '0',
          field_name varchar(32) NOT NULL default '',
          delta integer unsigned NOT NULL default '0',
          field_nid integer unsigned NOT NULL default '0',
          PRIMARY KEY  (vid,field_name,delta)
        )");
      break;