public function testLength()
 {
     $this->assertEquals('length(tempColumn)', DatabaseCompatibilityUtil::length('tempColumn'));
 }
 /**
  * @param string $columnName
  */
 protected static function resolvColumnNameSqlLengthFunction($columnName)
 {
     assert('is_string($columnName)');
     return DatabaseCompatibilityUtil::length($columnName);
 }