Couchbase Explain

cbq> EXPLAIN SELECT * FROM default WHERE fullName = 'John Smith';
{
    "requestID": "3956ea05-61d6-42d3-b570-b79d4ec5ea9f",
    "signature": "json",
    "results": [
        {
            "#operator": "Sequence",
            "~children": [
                {
                    "#operator": "IndexScan",
                    "index": "fullName_idx",
                    "keyspace": "default",
                    "limit": 9.223372036854776e+18,
                    "namespace": "default",
                    "spans": [
                        {
                            "Range": {
                                "High": [
                                    "\"John Smith\""
                                ],
                                "Inclusion": 3,
                                "Low": [
                                    "\"John Smith\""
                                ]
                            },
                            "Seek": null
                        }
                    ],
                    "using": "gsi"
                },
                {
                    "#operator": "Parallel",
                    "~child": {
                        "#operator": "Sequence",
                        "~children": [
                            {
                                "#operator": "Fetch",
                                "keyspace": "default",
                                "namespace": "default"
                            },
                            {
                                "#operator": "Filter",
                                "condition": "((`default`.`fullName`) = \"John Smith\")"
                            },
                            {
                                "#operator": "InitialProject",
                                "result_terms": [
                                    {
                                        "star": true
                                    }
                                ]
                            },
                            {
                                "#operator": "FinalProject"
                            }
                        ]
                    }
                }
            ]
        }
    ],
    "status": "success",
    "metrics": {
        "elapsedTime": "3.390859ms",
        "executionTime": "3.240493ms",
        "resultCount": 1,
        "resultSize": 2050
    }
}