Did I create 1 row or 4294967297?

SQL*Plus: RELEASE 11.1.0.7.0 - Production ON Fri Aug 7 22:09:14 2015

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Connected.
SQL>
SQL> @ cr.TABLE.feedback.SQL
SQL> DROP TABLE feedback;

TABLE dropped.

Elapsed: 00:00:01.17
SQL> CREATE TABLE feedback
  2  (
  3          n NUMBER
  4  );

TABLE created.

Elapsed: 00:00:00.06
SQL>
SQL>
SQL> INSERT /*+ append */ INTO feedback
  2  SELECT n
  3  FROM feedbackstage;

1 ROW created.

Elapsed: 00:49:28.54
SQL> COMMIT;

COMMIT complete.

Elapsed: 00:00:00.30
SQL> SELECT COUNT(*) FROM feedback;

  COUNT(*)
----------
4294967297

Elapsed: 00:01:05.54