Support retrieving all Metadata from only one connection to one dataspace

We are trying to query metadata from all the dataspaces but when we query a table that is associated with a different dataspaces, we must close the connection and create a new connection with the new dataspace. Is there any plans in the future to support retrieving metadata without needing this extra complexity?

We are currently using `getColumns()` and `getTables()` but can be extended other metadata retrievals methods.