Query: key_vault_keys_for_sql_server

with attached_keys as (
  select
    split_part(ep ->> 'serverKeyName', '_', 1) as key_vault_name,
    split_part(ep ->> 'serverKeyName', '_', 2) as key_vault_key_name
  from
    azure_sql_server,
    jsonb_array_elements(encryption_protector) as ep
  where
    lower(id) = $1
    and ep ->> 'kind' = 'azurekeyvault'
)
select
  lower(b.id) as key_vault_key_id
from
  attached_keys as a
  left join azure_key_vault_key as b on lower(a.key_vault_key_name) = lower(b.name);