src/Leevel/Database/Connect.php
protected function createSavepoint(string $savepointName): void
    {
        $this->setLastSql($sql = 'SAVEPOINT '.$savepointName);
        $this->pdo(true)->exec($sql);
    }
protected function createSavepoint(string $savepointName): void
    {
        $this->setLastSql($sql = 'SAVEPOINT '.$savepointName);
        $this->pdo(true)->exec($sql);
    }
保存部分事务保存点.

@param string $savepointName