Query: key_vault_vaults_for_sql_server

select
  lower(id) as key_vault_id
from
  azure_key_vault
where
  name in (
    select
      split_part(ep ->> 'serverKeyName', '_', 1) as key_vault_name
    from
      azure_sql_server,
      jsonb_array_elements(encryption_protector) as ep
    where
      lower(id) = $1
      and ep ->> 'kind' = 'azurekeyvault'
  );