text: sqlflow> SELECT *
  FROM iris.test
  PREDICT iris.predict.class
  USING sqlflow_models.my_dnn_model;
  -----------------------------
  2018/12/16 15:05:58 sqlflowCmd: run in Docker container
  Job success
  sqlflow> SELECT * FROM iris.predict LIMIT 10;
  +--------------+-------------+--------------+-------------+-------+
  | sepal_length | sepal_width | petal_length | petal_width | class |
  +--------------+-------------+--------------+-------------+-------+
  |          6.4 |         2.8 |          5.6 |         2.2 |     2 |
  |            5 |         2.3 |          3.3 |           1 |     1 |
  |          4.9 |         2.5 |          4.5 |         1.7 |     2 |
  |          4.9 |         3.1 |          1.5 |         0.1 |     0 |
  |          5.7 |         3.8 |          1.7 |         0.3 |     0 |
  |          4.4 |         3.2 |          1.3 |         0.2 |     0 |
  |          5.4 |         3.4 |          1.5 |         0.4 |     0 |
  |          6.9 |         3.1 |          5.1 |         2.3 |     2 |
  |          6.7 |         3.1 |          4.4 |         1.4 |     1 |
  |          5.1 |         3.7 |          1.5 |         0.4 |     0 |
  +--------------+-------------+--------------+-------------+-------+
  