As the subject states, I would like to search for tickets that have a null value in a particular field. For example, I want to find all tickets that have no labels, or no fix version, etc.
In the particular case I was using it, I have a search that will find all tickets without 3 specific labels, but when it returns a result, it is basically every other ticket that has a label, just not those three. This is only partially correct in the result I want, but I also need to see all the tickets that have no label to make my result truely complete.