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Merge pull request #710 from Icinga/pgsql-get_sla_ok_percent-decimal-…
…i648 PostgreSQL: get_sla_ok_percent to return decimal
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Original file line number | Diff line number | Diff line change |
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CREATE OR REPLACE FUNCTION get_sla_ok_percent( | ||
in_host_id bytea20, | ||
in_service_id bytea20, | ||
in_start_time biguint, | ||
in_end_time biguint | ||
) | ||
RETURNS decimal(7, 4) | ||
LANGUAGE plpgsql | ||
STABLE | ||
PARALLEL RESTRICTED | ||
AS $$ | ||
DECLARE | ||
last_event_time biguint := in_start_time; | ||
last_hard_state tinyuint; | ||
active_downtimes uint := 0; | ||
problem_time biguint := 0; | ||
total_time biguint; | ||
row record; | ||
BEGIN | ||
IF in_end_time <= in_start_time THEN | ||
RAISE 'end time must be greater than start time'; | ||
END IF; | ||
|
||
total_time := in_end_time - in_start_time; | ||
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||
-- Use the latest event at or before the beginning of the SLA interval as the initial state. | ||
SELECT hard_state INTO last_hard_state | ||
FROM sla_history_state s | ||
WHERE s.host_id = in_host_id | ||
AND ((in_service_id IS NULL AND s.service_id IS NULL) OR s.service_id = in_service_id) | ||
AND s.event_time <= in_start_time | ||
ORDER BY s.event_time DESC | ||
LIMIT 1; | ||
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||
-- If this does not exist, use the previous state from the first event after the beginning of the SLA interval. | ||
IF last_hard_state IS NULL THEN | ||
SELECT previous_hard_state INTO last_hard_state | ||
FROM sla_history_state s | ||
WHERE s.host_id = in_host_id | ||
AND ((in_service_id IS NULL AND s.service_id IS NULL) OR s.service_id = in_service_id) | ||
AND s.event_time > in_start_time | ||
ORDER BY s.event_time ASC | ||
LIMIT 1; | ||
END IF; | ||
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||
-- If this also does not exist, use the current host/service state. | ||
IF last_hard_state IS NULL THEN | ||
IF in_service_id IS NULL THEN | ||
SELECT hard_state INTO last_hard_state | ||
FROM host_state s | ||
WHERE s.host_id = in_host_id; | ||
ELSE | ||
SELECT hard_state INTO last_hard_state | ||
FROM service_state s | ||
WHERE s.host_id = in_host_id | ||
AND s.service_id = in_service_id; | ||
END IF; | ||
END IF; | ||
|
||
IF last_hard_state IS NULL THEN | ||
last_hard_state := 0; | ||
END IF; | ||
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FOR row IN | ||
( | ||
-- all downtime_start events before the end of the SLA interval | ||
-- for downtimes that overlap the SLA interval in any way | ||
SELECT | ||
GREATEST(downtime_start, in_start_time) AS event_time, | ||
'downtime_start' AS event_type, | ||
1 AS event_prio, | ||
NULL::tinyuint AS hard_state, | ||
NULL::tinyuint AS previous_hard_state | ||
FROM sla_history_downtime d | ||
WHERE d.host_id = in_host_id | ||
AND ((in_service_id IS NULL AND d.service_id IS NULL) OR d.service_id = in_service_id) | ||
AND d.downtime_start < in_end_time | ||
AND d.downtime_end >= in_start_time | ||
) UNION ALL ( | ||
-- all downtime_end events before the end of the SLA interval | ||
-- for downtimes that overlap the SLA interval in any way | ||
SELECT | ||
downtime_end AS event_time, | ||
'downtime_end' AS event_type, | ||
2 AS event_prio, | ||
NULL::tinyuint AS hard_state, | ||
NULL::tinyuint AS previous_hard_state | ||
FROM sla_history_downtime d | ||
WHERE d.host_id = in_host_id | ||
AND ((in_service_id IS NULL AND d.service_id IS NULL) OR d.service_id = in_service_id) | ||
AND d.downtime_start < in_end_time | ||
AND d.downtime_end >= in_start_time | ||
AND d.downtime_end < in_end_time | ||
) UNION ALL ( | ||
-- all state events strictly in interval | ||
SELECT | ||
event_time, | ||
'state_change' AS event_type, | ||
0 AS event_prio, | ||
hard_state, | ||
previous_hard_state | ||
FROM sla_history_state s | ||
WHERE s.host_id = in_host_id | ||
AND ((in_service_id IS NULL AND s.service_id IS NULL) OR s.service_id = in_service_id) | ||
AND s.event_time > in_start_time | ||
AND s.event_time < in_end_time | ||
) UNION ALL ( | ||
-- end event to keep loop simple, values are not used | ||
SELECT | ||
in_end_time AS event_time, | ||
'end' AS event_type, | ||
3 AS event_prio, | ||
NULL::tinyuint AS hard_state, | ||
NULL::tinyuint AS previous_hard_state | ||
) | ||
ORDER BY event_time, event_prio | ||
LOOP | ||
IF row.previous_hard_state = 99 THEN | ||
total_time := total_time - (row.event_time - last_event_time); | ||
ELSEIF ((in_service_id IS NULL AND last_hard_state > 0) OR (in_service_id IS NOT NULL AND last_hard_state > 1)) | ||
AND last_hard_state != 99 | ||
AND active_downtimes = 0 | ||
THEN | ||
problem_time := problem_time + row.event_time - last_event_time; | ||
END IF; | ||
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last_event_time := row.event_time; | ||
IF row.event_type = 'state_change' THEN | ||
last_hard_state := row.hard_state; | ||
ELSEIF row.event_type = 'downtime_start' THEN | ||
active_downtimes := active_downtimes + 1; | ||
ELSEIF row.event_type = 'downtime_end' THEN | ||
active_downtimes := active_downtimes - 1; | ||
END IF; | ||
END LOOP; | ||
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RETURN (100 * (total_time - problem_time)::decimal / total_time)::decimal(7, 4); | ||
END; | ||
$$; |
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