monitor_log_alert_create_policy_assignment.sql

with alert_rule as (
  select
    alert.id as alert_id,
    alert.name as alert_name,
    alert.enabled,
    alert.location,
    alert.subscription_id
  from
    azure_log_alert as alert,
    jsonb_array_elements_text(scopes) as sc
  where
    alert.location = 'Global'
    and alert.enabled
    and sc = '/subscriptions/' || alert.subscription_id
    and alert.condition -> 'allOf' @> '[{"equals":"Administrative","field":"category"}]'
    and alert.condition -> 'allOf' @> '[{"field": "resourceType", "equals": "microsoft.authorization/policyassignments"}]'
    and alert.condition -> 'allOf' @> '[{"field": "operationName", "equals": "Microsoft.Authorization/policyAssignments/write"}]'
  limit 1
)
select
  -- Required Columns
  a.subscription_id as resource,
  case
    when count(a.subscription_id) > 0 then 'ok'
    else 'alarm'
  end as status,
  case
    when count(a.subscription_id) > 0 then 'Activity log alert exists for create policy assignment event.'
    else 'Activity log alert does not exists for create policy assignment event.'
  end as reason,
  -- Additional Dimensions
  sub.display_name as subscription
from
  azure_subscription sub
  left join alert_rule a on sub.subscription_id = a.subscription_id
group by
  a.subscription_id,
  sub.display_name;