{
  head : {
    version : 1,
    generator : {
      type : "optiq",
      info : "na"
    },
    type : "APACHE_DRILL_PHYSICAL"
  },
         graph:[
         {
             @id:1,
             pop:"mock-sub-scan",
             url: "http://apache.org",
             entries:[
                 {records: 1, types: [
                   {name: "blue", type: "BIGINT", mode: "REQUIRED"}
                 ]}
             ]
         }, {
    pop : "project",
    @id : 2,
    exprs : [
    { ref : "SIN_VAL", expr : " sin(45) "},
    { ref : "COS_VAL", expr : " cos(45) "},
    { ref : "TAN_VAL", expr : " tan(45) " },
    { ref : "ASIN_VAL", expr : " asin(45) "},
    { ref : "ACOS_VAL", expr : " acos(45) "},
    { ref : "ATAN_VAL", expr : " atan(45) " },
    { ref : "SINH_VAL", expr : " sinh(45) "},
    { ref : "COSH_VAL", expr : " cosh(45) "},
    { ref : "TANH_VAL", expr : " tanh(45) " }
    ],
    child : 1
  }, {
    pop : "screen",
    @id : 3,
    child : 2
  } ]
}