Hi,
partitioning columns in Hive are logical columns that expose the path from the table root directory on HDFS to the files containing the data for a given partition value. In DSS, when you retrieve data from the dataset corresponding to the Hive table, you pass a list of values for the partitioning columns, and the data is filtered on these values. You can see the list of the existing values in the partitioning columns in the Status tab, or in the Sampling panel on the left of your Explore tab.
Regards,