Keras model prediction supports saving the column data which is not inside the features

[sneaxiy]

The following SQL programs would raise an error when predicting. It is because we do not support saving the column data which is not inside the features (i.e., petal_width in the following example).

SELECT sepal_length, sepal_width, petal_length
FROM iris.train
TO TRAIN sqlflow_models.OneClassSVM
WITH model.kernel = "rbf"
INTO iris.my_model;

SELECT sepal_length, sepal_width, petal_length, petal_width
FROM iris.train
TO PREDICT iris.predict_result.label
USING iris.my_model;