Just for those that aren't keeping track (or had their head in the sand the last few years), BlueDragon is not CFMX and only comes into play as a consideration if you wish to use a 3rd party copy or 'emulator' of the CF engine.
Since BlueDragon isn't 100% compatible (nor do they intend to be), writing for both CFMX (or Blackstone) and BlueDragon can be a more costly process that may result in not leveraging all of the strengths of CFMX (or Blackstone). Okay, enough on that sidebar. - Calvin -----Original Message----- From: Barney Boisvert [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 01, 2005 2:18 AM To: CF-Talk Subject: Re: grabbing the id of a newly created item.. That's something you should know about your DB. There are reasons to use transactions even if your DB doesn't support them. For instance, if you need 100% assurance that a series of statements will be executed on a single connection, and no other statements will be interspersed between them. If you have a driver that understands transactions (which the MySQL JDBC driver does) , and a transaction-aware connection pool, you can use transactions for exactly this effect, regardless of whether the DB actually supports transactional logic (which MYISAM tables don't). This allows you to effectively use table locks and LAST_INSERT_ID() on MYISAM tables, where you otherwise wouldn't be able to reliably do so, because of connection pooling. CFMX happens to single thread access to connections from the pool at a request level, but BlueDragon doesn't do this. On BD, every query pulls a connection from the pool, runs the query, and then releases the connection back to the pool. (Whether that's efficient or not is another discussion.) Therefore if you want to use table locks, you MUST use CFTRANSACTION. If MySQL threw an error, then BD's pooling mechanism would effectively prevent you from using MYISAM tables in any sort of efficient way. I'm willing to trust my knowledge of the DB for the ability to use the database in these scenarios. cheers, barneyb On Mon, 31 Jan 2005 21:14:57 +0100, Jochem van Dieten <[EMAIL PROTECTED]> wrote: > Barney Boisvert wrote: > > MyISAM tables don't support transactions. > > Exactly. But if you try to use a cftransaction on them, no error > is thrown. So you only find out much later that rollbacks didn't > work etc. > > Jochem > -- Barney Boisvert [EMAIL PROTECTED] 360.319.6145 http://www.barneyb.com/ Got Gmail? I have 6 invites. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:192526 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
