/**
  * Move the internal result pointer to the next available result
  *
  * @return true on success, false if there is no more result set or an error object on failure
  * @access public
  */
 function nextResult()
 {
     if (false === $this->result) {
         return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, 'resultset has already been freed', __FUNCTION__);
     }
     if (null === $this->result) {
         return false;
     }
     return @fbsql_next_result($this->result);
 }

 /**
  * Move the internal fbsql result pointer to the next available result
  *
  * @param a valid fbsql result resource
  *
  * @access public
  *
  * @return true if a result is available otherwise return false
  */
 function nextResult($result)
 {
     return @fbsql_next_result($result);
 }

 /**
  * Move the internal result pointer to the next available result
  * Currently not supported
  *
  * @return true on success, false if there is no more result set or an error object on failure
  * @access public
  */
 function nextResult()
 {
     if ($this->result === false) {
         return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null, 'nextResult: resultset has already been freed');
     } elseif (is_null($this->result)) {
         return false;
     }
     return @fbsql_next_result($this->result);
 }