Query: ec2_target_groups_for_ecs_service

select
  t.target_group_arn as target_group_arn
from
  aws_ecs_service as s,
  jsonb_array_elements(load_balancers) as l
  left join aws_ec2_target_group as t on t.target_group_arn = l ->> 'TargetGroupArn'
where
  s.arn = $1;