Query: vpc_num_ips_for_vpc

with cidrs as (
  select
    b ->> 'CidrBlock' as cidr_block,
    masklen((b ->> 'CidrBlock') :: cidr) as "Mask Length",
    power(2, 32 - masklen((b ->> 'CidrBlock') :: cidr)) as num_ips
  from
    aws_vpc,
    jsonb_array_elements(cidr_block_association_set) as b
  where
    vpc_id = $1
)
select
  sum(num_ips) as "IP Addresses"
from
  cidrs