[RESOLVED] This might be a simple question

[alanzhao]

Hi,

I got the following two queries:

INSERT INTO SOME TABLE

SELECT LAST_INSERT_ID() FROM SOME TABLE

Is it possible that before I got the last_insert_id, there is another INSERT query executed from another user, so last_insert_id isn't the one I inserted?

If it is possible, any way to solve it? Transaction maybe?

Thanks!

[rincewind456]

From the Mysql Manual about LAST_INSERT_ID

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.

hope it helps

[alanzhao]

Thanks!