> curl --data @- -X POST --dump - http://localhost:8529/_api/explain
{ "query" : "FOR i IN [ 1, 2, 3 ] FILTER 1 == 2 RETURN i" } 

HTTP/1.1 200 OK
content-type: application/json

{
  "plan": [
    { 
      "id" : 1, 
      "loopLevel" : 0, 
      "type" : "return (empty)", 
      "expression" : { 
        "type" : "const list", 
        "value" : "[  ]" 
      } 
    }
  ],
  "error": false,
  "code": 200
}