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Enter a descriptive title (above) relating to public static function Database::addConnectionInfo, then describe the problem you have found:
For me it wasn't very clear how to use this function in order to add a database at runtime. I was coding a module that needed access to an external database, the documentation led my to believe that I should only use this function once instead of running it again each time the external database is required.
In general I'm finding the database API documentation lacking in info as to when and how functions should be called.