anchor.diff:              "name": "my_sharded_connector",
               "ts_ms": 1559033904863,
               "snapshot": true,
  -            "db": "Vitess_server",
  -            "schema": "commerce",
  +            "db": "",
  +            "keyspace": "commerce",
               "table": "customers",
               "vgtid": "[{\"keyspace\":\"commerce\",\"shard\":\"80-\",\"gtid\":\"MariaDB/0-54610504-47\"},{\"keyspace\":\"commerce\",\"shard\":\"-80\",\"gtid\":\"MariaDB/0-1592148-45\"}]"
           },
  
positive.code:             "name": "my_sharded_connector",
              "ts_ms": 1559033904863,
              "snapshot": null,
              "db": "Vitess_server",
              "schema": "commerce",
              "table": "customers",
              "vgtid": "[{\"keyspace\":\"commerce\",\"shard\":\"80-\",\"gtid\":\"MariaDB/0-54610504-47\"},{\"keyspace\":\"commerce\",\"shard\":\"-80\",\"gtid\":\"MariaDB/0-1592148-47\"}]"
          },
  
negative.code:             "name": "my_sharded_connector",
              "ts_ms": 1559033904863,
              "snapshot": null,
              "db": "",
              "keyspace": "commerce",
              "table": "customers",
              "vgtid": "[{\"keyspace\":\"commerce\",\"shard\":\"80-\",\"gtid\":\"MariaDB/0-54610504-47\"},{\"keyspace\":\"commerce\",\"shard\":\"-80\",\"gtid\":\"MariaDB/0-1592148-46\"}]"
          },
  