Retrieving read_data function values without using table or details list

We have a read_data function which retrieves some values from the database.
​

[read_data1] => Array
        (
            [log] => Array
                (
                    [0] => SELECT `Data1`.`aid` AS `Data1.aid`, `Data1`.`number` AS `Data1.number` FROM `server_data_test` AS `Data1` WHERE `Data1`.`user_id` = '123' ORDER BY `Data1.aid` DESC;
                )

            [var] => Array
                (
                    [Data1] => Array
                        (
                            [aid] => 394
                            [number] => 4
                        )

                )

​
How do we retrieve the field "number" using php?
​
Tried the following to no avail:
$this->get("read_data1.Data1.number")
$this->get("read_data1.var.Data1.number")
$this->get("read_data1.Data1.var,number")