Using a date picker input box for a component filter

Good morning,

I need to create a date filter for the start date on a graph, and the date is a user input, so I create a Date Picker as input box and save it as a variable.

I struggle with the PQL in my graph FILTER PQL statement:

FILTER “table”.”datecolumn” >= {d ‘${my_start_date_variable}’}

But I get this error message

How do I adjust my PQL to get the date format correct? The date picker has a standard format that cannot be changed.

I also tried this, and it does not work:

FILTER “table”.”datecolumn” >= ({d '${my_start_date_variable}'}, FORMAT ( '%Y-%m-%d'))

Any assistance will be appreciated. 

Thank you,

Denise