The recommended way to get predictions for a full dataset is to
See http://learn.dataiku.com/tutorials/103/part2.html for a detailed explanation.
Alternatively, in models → settings → Train & validation, you may change the dataset used for validation and get a report on the whole dataset. But beware that using the same data for training and validation yields artificially good performance, that will not generalize when predicting on new data.
I hope this helps,