Готовность планировщика задач

SELECT
@task_all := (SELECT
COUNT(*)
FROM task_manager WHERE tsm_group='default' ) AS task_all,
@in_work := (SELECT
COUNT(*)
FROM task_manager WHERE tsm_status != 'COMPLETE' AND tsm_group='default' ) AS in_work,
@complete := (SELECT
COUNT(*)
FROM task_manager WHERE tsm_status = 'COMPLETE' AND tsm_group='default') AS complete,
CONCAT(REPEAT('#|',@complete),REPEAT('_|',@in_work)) AS c,
ROUND(@complete / @task_all * 100) AS progress,
(SELECT
tsm_name
FROM task_manager WHERE tsm_status <> 'COMPLETE' AND tsm_group='default' ORDER BY tsm_id LIMIT 1) AS task,
(SELECT
tsm_id
FROM task_manager WHERE tsm_status <> 'COMPLETE' AND tsm_group='default' ORDER BY tsm_id LIMIT 1) AS task_id,
(SELECT
tsm_status
FROM task_manager WHERE tsm_status <> 'COMPLETE' AND tsm_group='default' ORDER BY tsm_id LIMIT 1) AS task_status,
(SELECT DATE_ADD(`date`, INTERVAL -2 HOUR) AS date_field FROM ar_ps_motors.__log ORDER BY `id` DESC LIMIT 1) AS last_activity