if(
                isnull(local!priorityFilter),
                null,
                if(
                  local!priorityFilter = "${report_noValue}",
                  #"SYSTEM_SYSRULES_queryFilter"(field: "${priority_field_name}.value", operator: "is null"),
                  #"SYSTEM_SYSRULES_queryFilter"(field: "${priority_field_name}.value", operator: "=", value: local!priorityFilter)
                )
              )