PHP PDO在事务中创建多个表

Question

我有以下一些PHP代码,它创建了三个数据库表,然后尝试回滚事务.

$dbh = new \PDO("mysql:host=localhost;dbname=dbname", 'usernamehere', 'passwordhere');
$dbh->setAttribute(\PDO::ATTR_AUTOCOMMIT,FALSE);
$dbh->beginTransaction();
$sql = "CREATE TABLE IF NOT EXISTS `a` (`id` int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=latin1;";
$dbh->exec($sql);
$sql = "CREATE TABLE IF NOT EXISTS `b` (`id` int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=latin1;";
$dbh->exec($sql);
$sql = "CREATE TABLE IF NOT EXISTS `c` (`id` int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=latin1;";
$dbh->exec($sql);
$dbh->rollBack();

我希望不会创建表,但它们是.有什么想法吗？

Answer 1

该手册回答了这个问题.

当在事务中发出数据库定义语言(DDL)语句(如DROP TABLE或CREATE TABLE)时,某些数据库(包括MySQL)会自动发出隐式COMMIT.隐式COMMIT将阻止您回滚事务边界内的任何其他更改.