public function testSqrt()
 {
     $objTest = new TypeTest();
     $objTest->TestFloat = 4.0;
     $objTest->Save();
     $objTest2 = new TypeTest();
     $objTest2->TestFloat = 9.0;
     $objTest2->Save();
     $objResArray = TypeTest::QueryArray(QQ::Equal(QQ::Sqrt(QQN::TypeTest()->TestFloat), 3.0));
     $this->assertEquals(1, count($objResArray));
     if (count($objResArray) > 0) {
         $objRes = $objResArray[0];
         $this->assertNotNull($objRes);
         if ($objRes) {
             $this->assertEquals(9.0, $objRes->TestFloat);
         }
     }
     $objTest->Delete();
     $objTest2->Delete();
 }