37 lines
1.6 KiB
SQL
37 lines
1.6 KiB
SQL
-- GetActiveAlarms: Returns all currently active (uncleared) alarms
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-- Uses: idx_alarm_events_active, idx_alarm_events_clear, idx_alarm_event_data_lookup
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-- Expected performance: <200ms on 37K rows, <500ms on 1M+ rows
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-- Param: :priorityList (comma-separated priority numbers, or empty string for all)
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SELECT
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ae.id AS ID,
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ae.eventtime AS StartTimestamp,
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TIME_FORMAT(SEC_TO_TIME(TIMESTAMPDIFF(SECOND, ae.eventtime, NOW())), '%H:%i:%s') AS Duration,
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CONCAT(REPLACE(ae.displaypath, '_', '-'), ' ', SUBSTRING_INDEX(ae.source, ':/alm:', -1)) AS Description,
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CASE ae.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(ae.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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ae.displaypath AS Device
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FROM alarm_events ae FORCE INDEX (idx_alarm_events_active)
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LEFT JOIN alarm_event_data aed FORCE INDEX (idx_alarm_event_data_lookup)
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ON aed.id = ae.id AND aed.propname = 'myTag'
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WHERE ae.eventtype = 0
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AND ae.displaypath NOT LIKE '%System Startup%'
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AND ae.source NOT LIKE '%System Startup%'
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AND (:priorityList = '' OR FIND_IN_SET(CAST(ae.priority AS CHAR), :priorityList) > 0)
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-- FORCE INDEX ensures idx_alarm_events_clear is used in subquery
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AND NOT EXISTS (
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SELECT 1
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FROM alarm_events clr FORCE INDEX (idx_alarm_events_clear)
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WHERE clr.eventid = ae.eventid
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AND clr.eventtype = 1
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)
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ORDER BY ae.eventtime DESC; |