If you get stuck or a query runs forever, the operators are usually happy to help you. To find out who could be there to help you, check TOPCAT’s Service tab or use – the relational registry. If you have the ivoid of the service, say
SELECT role_name, email, base_role FROM rr.res_role WHERE ivoid='ivo://org.gavo.dc/__system__/tap/run'
– if allyou have is the access URL, do a natural join with interfaces.
If we have done a good job, you now know how…