{
  "head" : {
    "type" : "APACHE_DRILL_PHYSICAL",
    "version" : "1",
    "generator" : {
      "type" : "manual"
    }
  },
  "graph" : [ {
    "@id" : 1,
    "pop" : "fs-scan",
    "format" : {
      "type" : "json"
    },
    "storage" : {
      "type" : "file",
      "connection" : "file:///",
      "enabled" : true
    },
    "files" : [ "#{TEST_FILE}" ]
  }, {
    "@id" : 2,
    "child" : 1,
    "pop" : "union-exchange"
  }, {
    "@id" : 3,
    "child" : 2,
    "pop" : "screen"
  } ]
}