do_not_override distribution:
Array
(
    [0] => Array
        (
            [do_not_override] => 0
            [count] => 2574
        )

    [1] => Array
        (
            [do_not_override] => 1
            [count] => 100
        )

)

Records with do_not_override = 1:
Array
(
    [0] => Array
        (
            [coursereference_id] => 305
            [course_id] => 1231
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [1] => Array
        (
            [coursereference_id] => 512
            [course_id] => 826
            [unit_price] => 135.0000
            [do_not_override] => 1
        )

    [2] => Array
        (
            [coursereference_id] => 554
            [course_id] => 951
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [3] => Array
        (
            [coursereference_id] => 555
            [course_id] => 954
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [4] => Array
        (
            [coursereference_id] => 556
            [course_id] => 957
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [5] => Array
        (
            [coursereference_id] => 557
            [course_id] => 960
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [6] => Array
        (
            [coursereference_id] => 558
            [course_id] => 963
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [7] => Array
        (
            [coursereference_id] => 559
            [course_id] => 966
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [8] => Array
        (
            [coursereference_id] => 560
            [course_id] => 969
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

    [9] => Array
        (
            [coursereference_id] => 561
            [course_id] => 972
            [unit_price] => 0.0000
            [do_not_override] => 1
        )

)