incremental refresh for Power BI Pro

Hi, We have developed some reports using PowerBI and actually using the Import option as the dataset volume is bit more and also to enhance the perfiormance. Currently we have scheduled the refresh for the Imports in PowerBI Service. We are loading the data from the views in the Teradata DB. I wanted to know the below. "How the PowerBI Import schedule Refresh works? Does it bring in the full data from the tables everytime or it just brings up incremental data(new rows of .data or updated rows of data) after the Last refresh. Lets say if we have set the schedule refresh daily, does it bring all the data for all the tables everyday?" But got the reply that the refresh is full everyday. Is there any update when this incremental feature will be implemented?