> Thanks, but how secure is this. Is it possible for two computers to do > the "select" at the same time, i.e. get the new incremented value? > Computer one insert, computer two insert, computer one select, computer > two select? > > If this is possible how can I solve this? To make the column that insert > the new nextval unique and then check for errors (non-unique insert) and > if error then re-ask for a new nextval? Is this the best solution? >
It's not possible to mix up the values. The value returned last_insert_id() is conncection specific, so each computer will receive only the value that it generated. / Carsten -- Carsten H. Pedersen keeper and maintainer of the bitbybit.dk MySQL FAQ http://www.bitbybit.dk/mysqlfaq > Thanks / Henrik > > --- > > create table MySequence ( nextval int(10) not null default '0' > auto_increment ) ; > > insert into MySequence values (''); > select LAST_INSERT_ID(); > > is what I use.... > > M > > -----Original Message----- > From: Henrik Erlandsson [mailto:[EMAIL PROTECTED]] > Sent: 13 December 2001 15:41 > To: [EMAIL PROTECTED] > Subject: sequence and nextval > > > Does the above functions exist in MySQL? If not, when do you think it's > going to be implemented and how can I simulate nextval the easiest way? > > / Thanks Henrik --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
