Query working days from calendar in CRM 2015

Question

I have created a calendar (working days) for a resource (eg facility). How can I get a list or at least ranges of working days directly from the database?

All I have found so far are Calendar and CalendarRule views. The problem with the CalendarRule is that the rule is written with a pattern like

"FREQ=WEEKLY;INTERVAL=1;BYDAY=MO,TU,WE,TH,FR"

I can not find a way to use this in SQL query.

Answer 1

Assuming working days are mon to fri and your calendar table is linked to the resources table by calendar.workingdays = resources.daysworked , if not obviously adjust them to suit.

SELECT EXTRACT(dow FROM timestamp (to_timestamp(c.workingdays), "YYYY-MM-DD")), r.facility
FROM Calendar c
LEFT JOIN Resources r ON c.workingdays = r.daysworked
WHERE EXTRACT(dow FROM timestamp (to_timestamp(c.workingdays, "YYYY-MM-DD"))
NOT IN (0,6)