   protected function dataValue() {
      return [
         ['foo', "'foo'"],
         ['bar', "'bar'"],
         ['42', "'42'"],
         ['+33', "'+33'"],
         [null, 'NULL'],
         ['null', 'NULL'],
         ['NULL', 'NULL'],
         ['`field`', '`field`'],
         ['`field', "'`field'"]
      ];
   }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.