You can refresh the base view of the data source, this refresh will fetch all the modified data into the base view, basically, it will sync the base view with the data source. To do so you can go to the base view and click on the source refresh button, then click on save.
You can also detect changes in data sources combining the GET_SOURCE_CHANGES and GET_VIEWS stored procedures and automate the detection using Denodo Scheduler. For more details in automating this task you can refer to this document below:
Hope this helps!