As per BZ#1069438, it's important that we make consistent use of the 'default' keyword (rather than 'server_default') when creating columns with a default value. Let's add something to the developer guide to make this explicit.
I did this a while back. https://beaker-project.org/dev/guide/code-guidelines.html#database-column-defaults http://git.beaker-project.org/cgit/beaker-project.org/commit/?id=5cf6847775d93124bd3b9693420ed9bbb366a843