smerchek

The version is part of the WHERE clause in the UPDATE statement. Therefore, it is only possible to update the version of the entity that you were updating. If the entity is updated before your statement, it would not succeed in updating the row.

Is there a different concurrency issue I'm not seeing caused by updating the version in the trigger?

Totally noticed this in google analytics, earlier. Whoops. It's now fixed!

Concurrency issues can be solved by restricting the UPDATE to the version passed in by the application.

If I think I'm updating version 2 of an entity, then only update that version, otherwise throw an error.

I've updated the post to address this scenario.

Valid question though, I've updated the post to be more explicit and added a couple more query examples.