I tried to connect to freshly installed clickhouse and postgres for a development environment but sql-studio shouts at me that the password is missing.
With clickhouse-client and psql I can connect without a password just fine.
I also was not able to connect using unix sockets with sql-studio.
I haven't looked into the code, but with Postgres I think sql-studio shouldn't try to parse the connection string, but just pass it forward.
With Clickhouse I don't have any experience how connection works.