Query: ecs_task_definitions_for_ecs_service

select
  d.task_definition_arn as task_definition_arn
from
  aws_ecs_task_definition as d,
  aws_ecs_service as s
where
  d.task_definition_arn = s.task_definition
  and s.arn = $1
  and s.account_id = split_part($1, ':', 5)
  and s.region = split_part($1, ':', 4);