71 lines
2.7 KiB
SQL
71 lines
2.7 KiB
SQL
-- GetAlarms: Alarms that ended (cleared) within the specified timeframe
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-- Shows active alarms ONLY if the timeframe includes current time
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-- MAXIMUM PERFORMANCE: Optimized for EndTimestamp filtering
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-- Expected performance: <500ms on 37K rows
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-- Params: :starttime (DATETIME), :endtime (DATETIME)
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/*+ MAX_EXECUTION_TIME(8000) */
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SELECT
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a.id AS ID,
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a.eventtime AS StartTimestamp,
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clr.min_clear_time AS EndTimestamp,
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TIME_FORMAT(
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SEC_TO_TIME(TIMESTAMPDIFF(SECOND, a.eventtime, IFNULL(clr.min_clear_time, NOW()))),
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'%H:%i:%s'
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) AS Duration,
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CONCAT(REPLACE(a.displaypath, '_', '-'), ' ', SUBSTRING_INDEX(a.source, ':/alm:', -1)) AS Description,
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CASE a.priority
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WHEN 0 THEN 'Diagnostic'
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WHEN 1 THEN 'Low'
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WHEN 2 THEN 'Medium'
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WHEN 3 THEN 'High'
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WHEN 4 THEN 'Critical'
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ELSE 'Unknown'
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END AS Priority,
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CONCAT(a.displaypath, '.HMI.Alarm.', SUBSTRING_INDEX(IFNULL(aed.strValue, ''), '/', -1)) AS Tag,
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SUBSTRING_INDEX(SUBSTRING_INDEX(IFNULL(aed.strValue, ''), '/', 2), '/', -1) AS Location,
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aed.strValue AS FullTag,
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a.displaypath AS Device
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FROM alarm_events a FORCE INDEX (idx_alarm_events_type_time_id)
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LEFT JOIN (
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-- Find first clear time for each alarm
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SELECT eventid, MIN(eventtime) AS min_clear_time
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FROM alarm_events FORCE INDEX (idx_alarm_events_clear)
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WHERE eventtype = 1
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AND eventtime >= :starttime
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AND eventtime < :endtime
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GROUP BY eventid
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) clr ON clr.eventid = a.eventid AND clr.min_clear_time >= a.eventtime
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LEFT JOIN alarm_event_data aed FORCE INDEX (idx_alarm_event_data_lookup)
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ON aed.id = a.id AND aed.propname = 'myTag'
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WHERE
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a.eventtype = 0
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AND a.displaypath NOT LIKE '%System Startup%'
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AND a.source NOT LIKE '%System Startup%'
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-- Smart time filtering:
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-- If endtime is near NOW (within 5 mins), get ALL active alarms + historical in window
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-- If endtime is in the past, only get alarms that started in the window
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AND (
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-- Historical alarms: started in the time window
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(a.eventtime >= :starttime AND a.eventtime < :endtime)
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-- OR Live mode: ALL active alarms if endtime is within 5 mins of NOW
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OR (
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:endtime >= DATE_SUB(NOW(), INTERVAL 5 MINUTE)
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AND NOT EXISTS (
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SELECT 1
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FROM alarm_events clr2 FORCE INDEX (idx_alarm_events_clear)
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WHERE clr2.eventid = a.eventid AND clr2.eventtype = 1
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)
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)
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)
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-- Final filter: Cleared alarms must have cleared in window
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AND (
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clr.min_clear_time IS NOT NULL -- Cleared alarms in window
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OR :endtime >= DATE_SUB(NOW(), INTERVAL 5 MINUTE) -- Active alarms if endtime is recent
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)
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ORDER BY
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CASE WHEN clr.min_clear_time IS NULL THEN 0 ELSE 1 END,
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IFNULL(clr.min_clear_time, a.eventtime) DESC,
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a.id DESC; |