douqian5920 2016-02-24 21:48
浏览 242
已采纳

跨数据库的MySQL PHP事务

I cannot find a definitive answer to whether or not it's allowed to make transactions in PHP span multiple databases.

I am using the same connection object (mysqli) and performing the transaction(s) in this manner:

$mysqli->autocommit(false);

try {

    // Assume here that some code would throw an exception

    $stmt = $mysqli->prepare("INSERT INTO db1.x (column) VALUES (y)");
    $stmt->execute();
    $stmt->close();

    $stmt = $mysqli->prepare("INSERT INTO db2.x (column) VALUES (y)");
    $stmt->execute();
    $stmt->close();

    $mysqli->commit();
    // Great success

} catch (Exception $e) {

    $mysqli->rollback();
    throw $e; // handle elsewhere

}

Is this allowed and will it properly commit and roll back? According to the manual (http://dev.mysql.com/doc/refman/5.6/en/xa.html) and other threads on SO, it seems I need to use XA statements, but it's not really clear (to me) if this is when using multiple database servers, multiple connections or just in general when executing above code.

  • 写回答

2条回答 默认 最新

  • doushoubu5360 2016-02-24 21:58
    关注

    As per comment request above, omitting the create/use feedback:

    mysql> create database x;
    mysql> use x;
    mysql> create table x (x int);
    mysql> create database y;
    mysql> use y;
    mysql> create table y (y int);
    mysql> start transaction;
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> insert into x.x values (1);
    Query OK, 1 row affected (0.00 sec)
    
    mysql> insert into y.y values (1);
    Query OK, 1 row affected (0.00 sec)
    
    mysql> rollback;
    Query OK, 0 rows affected (0.01 sec)
    
    mysql> select * from x.x;
    Empty set (0.00 sec)
    
    mysql> select * from y.y;
    Empty set (0.00 sec)
    

    Note that this is all on a single connection, to a single mysql instance. It will NOT work if the dbs are hosted on different servers, or you're doing each create/insert on different connections.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(1条)

报告相同问题?

悬赏问题

  • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
  • ¥15 C#调用python代码(python带有库)
  • ¥15 矩阵加法的规则是两个矩阵中对应位置的数的绝对值进行加和
  • ¥15 活动选择题。最多可以参加几个项目?
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题
  • ¥20 云服务Linux系统TCP-MSS值修改?
  • ¥20 关于#单片机#的问题:项目:使用模拟iic与ov2640通讯环境:F407问题:读取的ID号总是0xff,自己调了调发现在读从机数据时,SDA线上并未有信号变化(语言-c语言)
  • ¥20 怎么在stm32门禁成品上增加查询记录功能
  • ¥15 Source insight编写代码后使用CCS5.2版本import之后,代码跳到注释行里面