How can i create table when i have register one storage plugin

[LIU Xiaobing]

Hi all,
I am a new user of Apache Drill. Now have set up one distributed hadoop
server with zookeeper and hbase run in. Then I deployed one clustered
environment according the wiki.
Now I have registered one storage plugin instance whose name is mydfs like
this:

{
  "type": "file",
  "enabled": true,
  "connection": "hdfs://192.168.41.243:9000/",
  "workspaces": {
    "json": {
      "location": "/drill/json",
      "writable": true,
      "defaultInputFormat": null
    }
  },
  "formats": {
    "json": {
      "type": "json"
    }
  }
}

Then should I create one external table pointed to reside hdfs directory
/drill/json like hive? I havn't found relative
information about this.
By the way, I also found that there isn't any default workspace whose name
is default of file or hive in the section Workspaces.
Is there anything i missing?

-- 
Best Regards
LIU Xiaobing 刘小兵