Query: iam_roles_for_redshift_cluster

select
  r ->> 'IamRoleArn' as role_arn
from
  aws_redshift_cluster,
  jsonb_array_elements(iam_roles) as r
where
  arn = $1
  and account_id = split_part($1, ':', 5)
  and region = split_part($1, ':', 4);