Admittedly, I'm no expert. What *is* connection pooling?
----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, May 02, 2002 11:21 AM Subject: RE: ensuring that I'm getting the correct "last insert ID" > what happens if you are using connection pooling though? > > > -----Original Message----- > From: denonymous [mailto:[EMAIL PROTECTED]] > Sent: 02 May 2002 08:09 > To: [EMAIL PROTECTED] > Subject: Re: ensuring that I'm getting the correct "last insert ID" > > > From: "Jonnycattt" <[EMAIL PROTECTED]> > > > Hi all, > > I know this has been asked a bunch of times, but i need some clarity (new > > mySQL user). > > I have an app that inserts a new user into one table, then inserts some > user > > preferences into another table. the procedure is as follows: > > 1) insert new user > > 2) query for that user's id using select max(userID) as LastUserID from > .. > > 3) insert into user preferences table using the previous query's > LastUserID. > > To be clear, this last insert adds mutliple rows to a table, not one row. > > > If I were you, I'd use MySQL's LAST_INSERT_ID() function: > http://www.mysql.com/doc/M/i/Miscellaneous_functions.html > > So long as your ID field is AUTO_INCREMENT, this will return the last > auto-generated field in the current handle. > > Something like this: > > INSERT INTO UserTable... (your first user insert) > SELECT LAST_INSERT_ID() FROM UserTable (this will return the userID of the > user you just inserted) > INSERT INTO OtherTables (pass the userID you just got to these queries) > > > You'd mentioned worries that a user could be added while another user was > still being processed, and the result would be the wrong userID being > returned. LAST_INSERT_ID() is handle-based, though, so there should be no > worries with that -- the sessions will be kept separate. > > Hope this helps! > > > -- > denonymous . : . : . AIM: denonymous > http://www.coldcircuit.net ' : ' : ' http://24.91.199.33 > > "According to one of our readers, the new MacOS X contains another > Satanic holdover from the 'BSD Unix' OS mentioned above; to open up > certain locked files one has to run a program much like the DOS > prompt in Microsoft Windows and type in a secret code: 'chmod 666'." > > > > --------------------------------------------------------------------- > 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 > > --------------------------------------------------------------------- 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
