Summary
The setup queries the available empty databases on the SQL server, this is for later use in case you want to use databases that are already available on the SQL server.
Additional Information
In case the setup neither finds one or more empty databases nor has the privileges to create new databases, it will display a message and drop execution. In order to install the product you need available empty databases or the privilege to create them.
Spider: Spider - System Requirements - SQL permission to create databases
Columbus: Spider - System Requirements - SQL permission to create databases