Query: vpc_subnets_for_rds_db_instance

select
  subnet ->> 'SubnetIdentifier' as subnet_id
from
  aws_rds_db_instance as rdb,
  jsonb_array_elements(subnets) as subnet
where
  rdb.arn = $1
  and rdb.account_id = split_part($1, ':', 5)
  and rdb.region = split_part($1, ':', 4);