+ function keys() {
+ $res = $this->_query( "SELECT keyname FROM $0" );
+ if(!$res) {
+ $this->_debug("keys: ** error: " . $this->_dberror($res) . " **");
+ return array();
+ }
+ $result = array();
+ while( $row = $this->_fetchobject($res) ) {
+ $result[] = $row->keyname;
+ }
+ return $result;
+ }
+