test.rb

batch_size = 1000
start_id = LoginInformation.minimum(LoginInformation.primary_key) || 0
max_id = LoginInformation.maximum(LoginInformation.primary_key) || 0
end_id = [start_id + batch_size, max_id].min

while start_id <= max_id
  LoginInformation.where("login_informations.id BETWEEN #{start_id} and #{end_id} AND temp_id_uuid_mappings.id = login_informations.id").update_all("uuid = temp_id_uuid_mappings.uuid FROM temp_id_uuid_mappings")
  start_id += batch_size
  end_id = [start_id + batch_size, max_id].min
end