Автор: Dan Ungureanu (udan1107@gmail.com)
Наследование: extends SqlParser\Statement
 /**
  * @return string
  */
 public function build()
 {
     $ret = OptionsArray::build($this->options);
     if ($this->type === TransactionStatement::TYPE_BEGIN) {
         foreach ($this->statements as $statement) {
             $ret .= ';' . $statement->build();
         }
         $ret .= ';' . $this->end->build();
     }
     return $ret;
 }