Managing Federated Systems

Aaron Bertrand tells how he would work with a federated system back in the SQL Server 2005 days, and ties it back to modern database deployment practices:

The biggest concern I have about database deployment is not about how you deploy, or even whether or not you use source control. It’s that your database changes are backward compatible – meaning they won’t break the current application, in the event the application can’t be changed at the same time (and with distributed software, that’s impossible). The largest number of bugs I had a hand in creating were caused because I assumed the application or middle tiers would be deployed at the same time.

I quickly became very motivated to make sure my changes would work before and after the application tier changes were deployed. Add a parameter to a stored procedure? Make sure it’s at the end, and has a default. Add a column to a table? Make sure views and stored procedures don’t expose it (yet) or require it. And a hundred other examples.

It’s a good read.

Related Posts

T-SQL Tuesday 118 Roundup

Kevin Chant played Santa Claus this month: I hope they had as much fun contributing their posts as I had reading them afterwards. For those who missed the invitation you can read about it here. For some reason I thought it’d be a good idea to do it on my birthday month when I first given […]

Read More

Scaling Out Continuous Integration

Chris Adkin shows off parallelism in Azure DevOps continuous integration pipelines: A SQL Server data tools project is checked out of GitHub, built into a DacPac, four containerized SQL Server instances are spun up using clones of the ‘Seed’ docker volume. The DacPac is applied to a database running inside each container, which a tSQLt […]

Read More

Categories