code: public function execute()
      {
          $sql = $this->getSql();
          $params = $this->params;
          $statements = $this->splitStatements($sql, $params);
          if ($statements === false) {
              return parent::execute();
          }
  
          $result = null;
          foreach ($statements as $statement) {
              list($statementSql, $statementParams) = $statement;
              $this->setSql($statementSql)->bindValues($statementParams);
              $result = parent::execute();
          }
          $this->setSql($sql)->bindValues($params);
          return $result;
      }
docs: {@inheritdoc}