Public.getmanagepercentavailnodewindow (function)

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Function

public.getmanagepercentavailnodewindow

Source

CREATE OR REPLACE FUNCTION public.getmanagepercentavailnodewindow(integer, timestamp without time zone, timestamp without time zone)
 RETURNS double precision
 LANGUAGE plpgsql
AS $function$
   DECLARE
	nid ALIAS FOR $1;
	xtime ALIAS FOR $2;
	ytime ALIAS FOR $3;
	downtime float8 := 0.0;
	count integer := 0;
	rollingWindow float := 0;
	totalServiceTime float := 0;
   BEGIN
	IF xtime < ytime THEN
		rollingWindow := EXTRACT (EPOCH FROM (ytime - xtime));
		downtime := getManagedOutageForNodeInWindow(nid, ytime, xtime)/1000;
	ELSE
		rollingWindow := EXTRACT (EPOCH FROM (xtime - ytime));
		downtime := getManagedOutageForNodeInWindow(nid, xtime, ytime)/1000;
	END IF;
	count := getManagedServiceCountForNode(nid);
	totalServiceTime := count * rollingWindow;

	IF totalServiceTime > 0 THEN
		RETURN 100 * (1 - (downtime / totalServiceTime));
	ELSE
		IF totalServiceTime = 0 THEN
                        RETURN 100;
                ELSE
                        RETURN -1;
                END IF;
	END IF;
   END;
$function$