Do SQL Server Express Editions support CLR procedures?

Question

Do SQL Server Express Editions (2005, and 2008) have support for installing, enabling and running CLR Stored procedures and functions.

Answer 1

Yes, the Express editions do support CLR integration. The link is for the latest version, but if you switch to 2008 you will see it is supported there too.

Answer 2

Yes, this is supported.

A note of caution, though: to support 2005, you have to be extremely careful to thoroughly test your application on 2005, because some of the functionality is limited compared to 2008+, and the differences are buried in the documentation.

For example, we had to deploy a user-defined aggregate function for our database, which is supposed to be 2005+ compatible, but found that the MaxByteSize attribute cannot be set to -1 (unlimited) on 2005 (and we require it to be -1 for our purposes). We were able to restrict deployment of the assembly to 2008+ for that feature -- you may not be as lucky.