{
    head:{
        type:"APACHE_DRILL_PHYSICAL",
        version:"1",
        generator:{
            type:"manual"
        }
    },
    graph:[
        {
            @id:1,
            pop:"mock-sub-scan",
            url: "http://apache.org",
            entries:[
        {records: 1, types: [
          {name: "varcharcol", type: "VARCHAR", mode: "REQUIRED"},
          {name: "nullvarcharcol", type: "VARCHAR", mode: "OPTIONAL"}
        ]}
            ]
        },
        {
            @id:2,
            child: 1,
            pop:"project",
            exprs: [
              { ref : "ref1", expr : " ascii('apache') "},
              { ref : "ref2", expr : " ascii('Apache') "},
              { ref : "ref3", expr : " ascii('अपाचे') "},
              { ref : "ref4", expr : " chr(65) "},
              { ref : "ref5", expr : " btrim('xyxbtrimyyx', 'xy') "},
              { ref : "ref6", expr : " repeatstr('Peace ', 3) "},
              { ref : "ref7", expr : " repeatstr('हकुना मताता ', 2) "},
              { ref : "ref8", expr : " reverse('tictak') "},
              { ref : "ref9", expr : " toascii('âpple','ISO-8859-1') "},
              { ref : "ref10", expr : " reverse('मदन') "}
           ]
        },
        {
            @id: 3,
            child: 2,
            pop: "screen"
        }
    ]
}