{
  head:{
    type:"APACHE_DRILL_PHYSICAL",
    version:"1",
    generator:{
      type:"manual"
    }
  },
  graph:[
    {
      @id:1,
      pop:"mock-sub-scan",
      url: "http://source1.apache.org",
      entries:[
        {records: 100000, types: [
          {name: "blue", type: "INT", mode: "REQUIRED"},
          {name: "red", type: "INT", mode: "REQUIRED"},
          {name: "green", type: "INT", mode: "REQUIRED"}
        ]}
      ]
    },
    {
      @id:2,
      pop:"mock-sub-scan",
      url: "http://source2.apache.org",
      entries:[
        {records: 1, types: [
          {name: "blue1", type: "INT", mode: "REQUIRED"},
          {name: "red1", type: "INT", mode: "REQUIRED"},
          {name: "green1", type: "INT", mode: "REQUIRED"}
        ]}
      ]
    },
    {
      @id: 3,
      right: 1,
      left: 2,
      pop: "hash-join",
      joinType: "RIGHT",
      conditions: [ {relationship: "==", left: "blue1", right: "blue"} ]
    },
    {
      @id: 4,
      child: 3,
      pop: "screen"
    }
  ]
}