Can we pass Mysql database name and table name to dynamically through web url using macros?

I am getting difficulties in passing the database connection detail to a RapidMiner process deployed as a webservice . I tried to use macros and even after providing correct connection details.

I keep on getting this error

de.rapidanalytics.ejb.service.ServiceDataSourceExceptionError executing process /home/proc_1/test for service test: Database error occurred: Could not connect: Access denied for user 'root'@'static.115.208.216.95.clients.your-server.de' (using password: YES)