mysql_insert_id() 在竞争条件下的可靠性如何？我的意思是当多个用户同时插入数据时，这个函数会返回真实ID还是会返回其他用户插入的数据ID？
表引擎是MyISAM。
最佳答案
mysql_insert_id 是完全多用户安全的。它完全依赖于数据库连接，每个连接只能有一个用户....因此，根据您的问题，它返回 true编号....
来自 MySql documentation ,
The ID that was generated is maintained in the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client. This value cannot be affected by other clients, even if they generate AUTO_INCREMENT values of their own. This behavior ensures that each client can retrieve its own ID without concern for the activity of other clients, and without the need for locks or transactions.
关于并发数据插入中的mysql_insert_id问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11920804/