Connecting to the DDN
The Splitgraph "Data Delivery Network" (DDN) is based on the PostgreSQL wire protocol. Most SQL clients should be able to connect to it and query it.
Introspection: Some clients send "introspection queries" so they know which tables and schemas to show you in the workspace. In most cases, these introspection queries are compatible with Splitgraph, which will return a list of tables in your "workspace" (currently, any repositories you own, along with a handful of Splitgraph-featured repositories).
Troubleshooting Introspection: In some cases, clients may send introspection queries that Splitgraph does not know how to answer. In this case you should file an issue with details of your client.
Other exceptions and quirks of various clients are listed below. This is not an exhaustive list.