If you select a partitioned dataset in your clear step, an information bubble with how to express ranges is available, does that help?
For time partitioning, in addition to the format indicated, you can also select ranges or use special keywords. To select all partitions between two dates, use the character / between the two dates to separate the beginning from the end.
You can use the special keyword CURRENT_DAY if your partitioning maps to days : it will be respectively replaced by the current date when the scheduler will run the task. Similarly, you can use PREVIOUS_DAY. For time partitioning on months and hours, CURRENT_MONTH, PREVIOUS_MONTH, CURRENT_HOUR, PREVIOUS_HOUR can be used in the same fashion.
Although, you cannot use these keywords with the / notation for date ranges.
- 2014-03-01/2014-04-15 for a daily scheduled task will build every partition between 1st March 2014 and 15th April 2014 every day.
- PREVIOUS_MONTH for a monthly scheduled task will build the partition corresponding to the previous month.