Megatest

    
;; RA => Might require revert for filters 
;; create a watch dog to move changes from lt/.db/*.db to megatest.db
;;
;;;(if (file-write-access? (conc *toppath* "/megatest.db"))
;;(debug:print-info 13 *default-log-port* "Before common:watchdog spawn")

;; (thread-start! (make-thread common:watchdog "Watchdog thread"))
;;(debug:print-info 13 *default-log-port* "After common:watchdog spawn")
;; (if (not (args:get-arg "-use-db-cache"))
;;     (begin
;;       (debug:print-info 0 *default-log-port* "Forcing db-cache mode due to read-only access to megatest.db")
;;       (hash-table-set! args:arg-hash "-use-db-cache" #t)));;;)
;;)

		    (if (equal? (car parts) "sqlite3")
			(cadr parts)
			(begin
			  (debug:print 0 *default-log-port* "ERROR: I only know sqlite3 databases for now: " dbstr)
			  #f)))))
    (if (and dbpth (file-read-access? dbpth))
	(let ((db (sqlite3:open-database dbpth))) ;; (open-database dbpth)))
	  (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 10000))
	  db)
	#f)))

;; sqlite3:path tablename timefieldname varfieldname field1 field2 ...
;;
(define (dboard:graph-read-data cmdstring tstart tend)
  (let* ((parts (string-split cmdstring))) ;; spaces not allowed