Problem/Motivation
In #3457540: [meta] Add database driver for MongoDB to Core as experimental we are adding a database driver for MongoDB. MongoDB does not use a relational database storage. We should add a method to the database connection class that returns TRUE when the database driver uses a relational database storage and FALSE when it does not.
Proposed resolution
Add the method Connection::usesRelationalDatabaseStorage()
Remaining tasks
Do it.
User interface changes
None
API changes
Added new method Connection::usesRelationalDatabaseStorage()
Data model changes
None
Release notes snippet
TBD