Hi.
There is a one-query method to do that and it is even explicitly
documented: http://www.mysql.com/doc/M/i/Miscellaneous_functions.html
(under LAST_INSERT_ID([expr])). This requires an UPDATE and using a
client API function like mysql_insert_id(). No locks needed and the
operation is atomic (i.e. no 'precision' trade-off).
Bye,
Benjamin.
On Sun, Apr 14, 2002 at 09:11:03PM -0600, [EMAIL PROTECTED] wrote:
> I'd recomment PHP4 using pconnect and MySQL. And I'd /not/ use locking
> on the table. Run a query to update the row, then run a select to grab
> the current total. In the case of a counter, it doesn't require the
> precision that most things would. (i.e., it's okay if the row you read
> doesn't have the value you just set in the update.)
>
> As far as performance goes, my PHP app can do 40+ queries in less that
> .05 seconds. So you shouldn't have problems there.
[...]
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