Reference "null" in GUI mode filters when using the retool database?

I'm testing Retool with a very basic database of employees and contracts, with contracts being versioned using the "next" foreign key - the current contract for an employee has "next" and "end_date" set to null:

The problem is, when I try to construct a query in GUI mode and filter for null values, IS NULL does not work

and = NULL does not work either

is it an issue with the retool db, the interface or am I doing something wrong?

Hi @wojcio

Could you try IS and {{null}}?

Like this: