Reconfigure on update?

I updated my test installation from 1.2 to 1.2.1

I had to run the installation (it asked me again mysql info for example) process to do it. I’ve done something wrong or is the normal procedure?

It’s because I overwritten database.php? Right?

A solution to this can be that database.php file could be generated if not present, so in this way we have only to overwrite files and run setup.

As it’s clearly stated in the Wiki article about Updating there is no need to change anything.