src/DB/Drivers/PDOSqlDriver.php
public function stmtFetch($_fetchAll = false, $fetch_style = PDO::FETCH_ASSOC)
    {
        if (!$this->stmt) {
            throw new CoreException('stmt init failed!');
        }

        if (true === $_fetchAll) {
            return $this->stmt->fetchAll($fetch_style);
        }

        return $this->stmt->fetch($fetch_style);
    }
public function stmtFetch($_fetchAll = false, $fetch_style = PDO::FETCH_ASSOC)
    {
        if (!$this->stmt) {
            throw new CoreException('stmt init failed!');
        }

        if (true === $_fetchAll) {
            return $this->stmt->fetchAll($fetch_style);
        }

        return $this->stmt->fetch($fetch_style);
    }
返回参数绑定结果

@param bool $_fetchAll
@param int $fetch_style
@return mixed
@throws CoreException