As Jira and Confluence have moved forward, the list of supported databases has changed. Lets say you want to upgrade your applications the simple way - by using the installer and upgrading in place. However, your upgraded version cannot work with the database you have in place. How do you upgrade using the installer in scenarios like this?
For example, according to the Atlassian documentation you SHOULD be able to go from say... Confluence 5.6 to 7 in a single leap. That doesn't seem to actually be the case.