Visit time in log_link_visit_action

Hi there,

I have a question regarding the development of a plugin which, besides some other features, is supposed to show the time users visited single pages. Now from what I see, this is not possible yet, because the table log_link_visit_action is missing a timestamp so far.
Is it common/advisable to include an extension to the database (i.e. new column with a timestamp for each entry in log_link_visit_action) with a new plugin?

Thanks for any suggestions,
Pat