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-- +migrate Up
-- +migrate StatementBegin
CREATE OR REPLACE FUNCTION escalate_alerts() RETURNS void
LANGUAGE plpgsql
AS $$
BEGIN
UPDATE alerts a
SET escalation_level = escalation_level + 1, last_escalation = now()
FROM service s, escalation_policy_step step, alert_escalation_levels lvl, escalation_policy e
WHERE (last_escalation + (step.delay::TEXT||' minutes')::interval) < now()
AND a.status = 'triggered'::enum_alert_status
AND s.id = a.service_id
AND step.escalation_policy_id = s.escalation_policy_id
AND lvl.alert_id = a.id
AND step.step_number = (a.escalation_level % lvl.levels)
AND e.id = s.escalation_policy_id
AND (e.repeat = -1 OR (escalation_level+1) / lvl.levels <= e.repeat);
END;
$$;
-- +migrate StatementEnd
-- +migrate Down
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