Using Calendar Picker (Dashboard Prompt) variable in report filter

Question

Hi All,
I have checked the forum and it doesn't look like this was answered. I have a presentation variable "CalendarDate" for a dashboard prompt that uses the calendar picker. Has anyone found an easy way to use the presentation variable in a report filter?
I want to grab the presentation variable then use this as the criterion for the report filter.
I have tried the below for the report filter but I receive an error. Do I have to cast this value to a Date?
Date.Date <= @{CalendarDate}
Or, do I have to get the variable value and convert it to the date 'YYYY-MM-DD' format to use?
Any thoughts would be appreciated.
Thanks!
John

Answer 1

So here is what I came up with. Probably not the most efficient nor elegant but it works. I am now able to use the calendar picker variable as a date to perform date calculations.
Basically there are three scenarios for the variable value: D/M/YYYY, (DD/M/YYYY or D/MM/YYYY), DD/MM/YYYY. I use char_length function to find the length. When char length is equal to 9 there are two scenarios. If none of the scenarios work, pass the CURRENT_DATE.
code below --------
CASE CHAR_LENGTH('@{CalendarDate}')
WHEN 8 THEN CAST('date' || ' ' || char(39) || SUBSTRING('@{CalendarDate}' FROM 5 FOR 8) || '-' || CONCAT('0', SUBSTRING('@{CalendarDate}' FROM 1 FOR 1)) || '-' || CONCAT('0', SUBSTRING('@{CalendarDate}' FROM 3 FOR 1)) || char(39) AS DATE)
WHEN 9 THEN
     CASE WHEN SUBSTRING('@{CalendarDate}' FROM 2 FOR 1) = '/' THEN
     CAST('date' || ' ' || char(39) || SUBSTRING('@{CalendarDate}' FROM 6 FOR 9) || '-' || CONCAT('0', SUBSTRING('@{CalendarDate}' FROM 1 FOR 1)) || '-' || SUBSTRING('@{CalendarDate}' FROM 3 FOR 2) || char(39) AS DATE)
     ELSE
     CAST('date' || ' ' || char(39) || SUBSTRING('@{CalendarDate}' FROM 6 FOR 9) || '-' || SUBSTRING('@{CalendarDate}' FROM 1 FOR 2) || '-' || CONCAT('0', SUBSTRING('@{CalendarDate}' FROM 4 FOR 1)) || char(39) AS DATE)
     END
WHEN 10 THEN
CAST('date' || ' ' || char(39) || SUBSTRING('@{CalendarDate}' FROM 7 FOR 10) || '-' || SUBSTRING('@{CalendarDate}' FROM 1 FOR 2) || '-' || SUBSTRING('@{CalendarDate}' FROM 4 FOR 2) || char(39) AS DATE)
ELSE CURRENT_DATE
END