Query: rds_db_instance_mariadb_encryption_in_transit_enabled

 with instance_pg as (
  select
    g ->> 'DBParameterGroupName' as pg_name,
    i.engine,
    i.title,
    i.arn,
    i.tags,
    i.region,
    i.account_id,
    i._ctx
  from
    aws_rds_db_instance as i,
    jsonb_array_elements(db_parameter_groups) as g
), pg_with_encryption_in_transit_enabled as (
  select
    g.name,
    g.account_id,
    g.region
  from
    instance_pg as i,
    aws_rds_db_parameter_group as g,
    jsonb_array_elements(parameters) as p
  where
    i.pg_name = g.name
    and g.account_id = i.account_id
    and g.region = i.region
    and p ->> 'ParameterName' = 'require_secure_transport'
    and p ->> 'ParameterValue' = '1'
)
select
  i.arn as resource,
  engine,
  case
    when engine <> 'mariadb' then 'skip'
    when p.name is not null then 'ok'
    else 'alarm'
  end as status,
  case
    when engine <> 'mariadb' then title || ' is of ' || engine || ' type.'
    when p.name is not null then title || ' encryption in transit enabled.'
    else title || ' encryption in transit disabled.'
  end as reason
  
  , i.region, i.account_id
from
  instance_pg as i
  left join pg_with_encryption_in_transit_enabled as p on p.name = i.pg_name and p.account_id = i.account_id and p.region = i.region;