Showing posts from March, 2011

The benefit of T-SQL 3 part naming

So yesterday I made the second ever major technical boo-boo of my career - I accidentally ran a dynamic "DROP TABLE" script on an extremely large, high-availability system. The last time I did something of this magnitude was literally when I first started out with T-SQL, and I ran a load of DROP / CREATE PROC statements on a similar sized system, right in the middle of rush hour; instantly breaking the 500 of so clients that were connected to it. Obviously this kind of thing is very embarrassing, not to mention the massive inconvenience caused throughout the departments using the system. Luckily the database is backed up hourly (thank you Mr DBA), and although I made the mistake 6 minutes before the next back up, the impact was relatively minimal due to the main user's being in a departmental meeting. I'm blogging to outline my mistake and document changes to my T-SQL script, which up until 13:34 yesterday, made my life considerably easier and I thought was the dog

T-SQL CRUD Generation

Following on from my last post  complaining about MSSQLMS UI code generation , I thought I would back it up with a few T-SQL scripts that generate code that I actually want to see. I'm currently developing a large scale, real life application using my new .Net 4.0 nTier framework , so I've decided to make my life a little bit easier by generating the boring old CRUD stored procedures with some funky T-SQL scripts. I'm also currently looking in to Visual Studio's T4 code generation tools to help me create my business objects, as most of those will also be fairly standard - though I still need the flexibility to change them (and guarantee that a code generation tool isn't going to overwrite my changes) once the templates have all been created. Let me start by saying I'm usually against the use of the 'sp_executesql' stored procedure due to the additional overhead created by executing dynamic SQL. In this instance however, I'm happy to use it becaus