Query: iot_hub_private_link_used

select
  a.id as resource,
  case
    -- Only applicable to standard tier
    when sku_tier = 'Basic' then 'skip'
    when pec -> 'properties' -> 'privateLinkServiceConnectionState' ->> 'status' = 'Approved' then 'ok'
    else 'alarm'
  end as status,
  case
    when sku_tier = 'Basic' then a.name || ' is of ' || sku_tier || ' tier.'
    when pec -> 'properties' -> 'privateLinkServiceConnectionState' ->> 'status' = 'Approved' then a.name || ' using private link.'
    else a.name || ' not using private link.'
  end as reason
  
  , a.resource_group as resource_group
  , sub.display_name as subscription
from
  azure_iothub a,
  jsonb_array_elements(private_endpoint_connections) as pec,
  azure_subscription sub
where
  sub.subscription_id = a.subscription_id;