{
    "head":{"type":"APACHE_DRILL_LOGICAL",
        "version":"1",
        "generator":{"type":"manual","info":"na"}
    },
    "storage":{
        "donuts-json":{"type":"classpath"},
        "queue":{"type":"queue"}
    },
    "query":[
        {"op":"sequence",
          "do":[
                {
                    "op":"scan",
                    "memo":"initial_scan",
                    "ref":"_MAP",
                    "storageengine":"donuts-json"
                    ,"selection":{"path":"/donuts.json","type":"JSON"}
                },
                {
                    "op":"filter",
                    "expr":"(3 < 4)"
                },
                {
                    "op":"store",
                    "storageengine":"queue",
                    "memo":"output sink",
                    "target":{"number":0}
                }
            ]
        }
    ]
}