{
  "head" : {
    "type" : "APACHE_DRILL_PHYSICAL",
    "version" : "1",
    "generator" : {
      "type" : "manual"
    }
  },
  "graph" : [ {
    "@id" : 1,
    "pop" : "fs-scan",
    "format" : {
      "type" : "json"
    },
    "storage" : {
      "type" : "file",
      "connection" : "classpath:///",
      "enabled": true
    },
    "files" : [ "#{TEST_FILE}" ]
  }, {
    "@id" : 2,
    "child" : 1,
    "pop" : "project",
    "exprs" : [ {
      "ref" : "int2varchar",
      "expr" : "cast(integer as varchar(20))"
    }, {
      "ref" : "float2varchar",
      "expr" : "cast(float as varchar(20))"
    } ]
  }, {
    "@id" : 3,
    "child" : 2,
    "pop" : "screen"
  } ]
}