Megatest

		       db
		       "SELECT fieldname FROM keys ORDER BY id DESC;")))
	(set! *db-keys* res)
	res)))

;; look up values in a header/data structure
(define (db:get-value-by-header row header field)
  (if (null? header) #f
  (if (or (null? header) (not row))
      #f
      (let loop ((hed (car header))
		 (tal (cdr header))
		 (n   0))
	(if (equal? hed field)
	    (vector-ref row n)
	    (if (null? tal) #f (loop (car tal)(cdr tal)(+ n 1)))))))