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PHP -MySQL insert和select语句-如何使其原子化？

[英]PHP -MySQL insert and select statements - how to make them atomic?

原文 2011-08-08 00:25:12 6 1 php/ mysql/ insert/ atomic

Im new to PHP and I was wondering how I can overcome this seemingly simple problem: 我是PHP的新手，我想知道如何克服这个看似简单的问题：

I have a database with several tables. 我有一个带有多个表的数据库。 Of them 1 table is called "order_header". 其中1个表称为“ order_header”。 Order header has a field called "orderID" which is the primaryKey and is auto-incremented. 订单标头具有一个称为“ orderID”的字段，该字段是primaryKey，并且会自动递增。 OrderID is used in other tables in the database (food_table, drinks_table, merchant_info, customer_info, etc)and is unique to a particular order. OrderID在数据库的其他表（food_table，drinks_table，merchant_info，customer_info等）中使用，并且对于特定订单是唯一的。

Now I insert data into the order_header using the usual INSERT statement and the order_header generates a new orderID. 现在，我使用通常的INSERT语句将数据插入order_header中，并且order_header生成一个新的orderID。 But now I need to retrieve the orderID I just created and use it to insert data into other tables of that database. 但是现在，我需要检索刚刚创建的orderID，并使用它将数据插入到该数据库的其他表中。

The question is how can I do both inserting data and retrieving the resulting orderID in one atomic method? 问题是，如何在一种原子方法中插入数据并检索得到的orderID？ I cannot use the mySQL query to get the last orderID because what if another thread has inserted an entry in orderID in the meanwhile. 我不能使用mySQL查询来获取最后的orderID，因为如果同时有另一个线程在orderID中插入了一个条目，该怎么办。

In Java I guess one could use locks and the word @synchronized, but how would one do this in PHP? 在Java中，我猜一个人可以使用锁和@synchronized这个词，但是在PHP中怎么做呢？

1 个解决方案

Use mysql_insert_id straight after the query. 查询后立即使用mysql_insert_id 。 It doesn't run another query to find the last ID 它不会运行另一个查询来找到最后一个ID

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