http://www.brentozar.com/archive/2009/02/the-dangers-of-building-linked-servers-on-the-fly/ Your technology pain-relief experts. Wed, 08 Feb 2012 16:37:59 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://www.brentozar.com/archive/2009/02/the-dangers-of-building-linked-servers-on-the-fly/comment-page-1/#comment-7489 More Violated Now Than Ever Before | SQLBatman.com Tue, 24 Feb 2009 15:18:28 +0000 http://www.brentozar.com/?p=2680#comment-7489 [...] the same time, I noticed that Brent Ozar posted an entry to his blog on the dangers of building linked servers on the fly. Seemed like too much of a coincidence, right? So I grilled Brent on the subject, for two reasons. [...] [...] the same time, I noticed that Brent Ozar posted an entry to his blog on the dangers of building linked servers on the fly. Seemed like too much of a coincidence, right? So I grilled Brent on the subject, for two reasons. [...]

]]> http://www.brentozar.com/archive/2009/02/the-dangers-of-building-linked-servers-on-the-fly/comment-page-1/#comment-7471 K_Brian_Kelley Mon, 23 Feb 2009 21:05:52 +0000 http://www.brentozar.com/?p=2680#comment-7471 Amen, brother. Another issue. Linked server connection sticks around. No one notices the failed job before the next run. Step 1 goes to create linked server connection. Job blows up. Amen, brother. Another issue. Linked server connection sticks around. No one notices the failed job before the next run. Step 1 goes to create linked server connection. Job blows up.

]]> http://www.brentozar.com/archive/2009/02/the-dangers-of-building-linked-servers-on-the-fly/comment-page-1/#comment-7470 Rhys Mon, 23 Feb 2009 20:25:55 +0000 http://www.brentozar.com/?p=2680#comment-7470 I've worked a lot with Linked Servers in a SQL Server & MySQL environment. It's actually pretty solid but best to keep the amounts of data reasonably small. I used a datetime query to pull out recently modified website user records and launch them into salesforce.com. Somehow a mistake on the site cause a null value in my system, MySQL (damn it) happily ran a query that said >= NULL but decided to pull back the entire table of approximately 3.5 millions records. Luckily I caught this in time and managed to kill the process. I would not have been man of the moment had I not! I've worked a lot with Linked Servers in a SQL Server & MySQL environment. It's actually pretty solid but best to keep the amounts of data reasonably small. I used a datetime query to pull out recently modified website user records and launch them into salesforce.com. Somehow a mistake on the site cause a null value in my system, MySQL (damn it) happily ran a query that said >= NULL but decided to pull back the entire table of approximately 3.5 millions records. Luckily I caught this in time and managed to kill the process. I would not have been man of the moment had I not!

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