Megatest

      (let* ((dbdat (make-dbr:dbdat
		     dbfile: (dbr:dbstruct-dbfile dbstruct)
		     dbh:    (dbr:dbstruct-inmem  dbstruct)
		     )))
	(dbr:dbstruct-dbdat-set! dbstruct dbdat)
	dbdat)))

;; NOT USED?
(define (dbmod:need-on-disk-db-handle)
    (case (dbfile:cache-method)
      ((none tmp) #t)
      ((inmem)
       (case (dbfile:sync-method)
	 ((original) #t)
	 ((attach)   #t) ;; we need it to force creation of the on-disk file - FIXME

	 (tmpdir       (conc "/tmp/"(current-user-name)))
	 (tmpdb        (let* ((fname (conc tmpdir"/" (string-translate areapath "/" ".")"-"(current-process-id)"-"dbfname)))
			 (if (not (file-exists? tmpdir))(create-directory tmpdir))
			 ;; check if tmpdb already exists, either delete it or
			 ;; add something to the name
			 fname))
	 (inmem        (dbmod:open-inmem-db init-proc
					    (if (eq? (dbfile:cache-method) 'inmem)
						#f
						tmpdb)
					    ))
	 (write-access (file-write-access? dbpath))
	 (db           (dbmod:safely-open-db dbfullname init-proc write-access))
	 (tables       (db:sync-all-tables-list keys)))
    (if (not (and (sqlite3:database? inmem)