shell> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/explain <<EOF
{
"query" : "FOR p IN products FILTER p.id == 25 RETURN p",
"options" : {
"allPlans" : true
}
}
EOF
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"plans" : [
{
"nodes" : [
{
"type" : "SingletonNode",
"dependencies" : [ ],
"id" : 1,
"estimatedCost" : 1,
"estimatedNrItems" : 1
},
{
"type" : "IndexNode",
"dependencies" : [
1
],
"id" : 6,
"estimatedCost" : 1.99,
"estimatedNrItems" : 1,
"database" : "_system",
"collection" : "products",
"outVariable" : {
"id" : 0,
"name" : "p"
},
"indexes" : [
{
"id" : "10620",
"type" : "hash",
"fields" : [
"id"
],
"selectivityEstimate" : 1,
"unique" : false,
"sparse" : false
}
],
"condition" : {
"type" : "n-ary or",
"subNodes" : [
{
"type" : "n-ary and",
"subNodes" : [
{
"type" : "compare ==",
"subNodes" : [
{
"type" : "attribute access",
"name" : "id",
"subNodes" : [
{
"type" : "reference",
"name" : "p",
"id" : 0
}
]
},
{
"type" : "value",
"value" : 25
}
]
}
]
}
]
},
"reverse" : false
},
{
"type" : "ReturnNode",
"dependencies" : [
6
],
"id" : 5,
"estimatedCost" : 2.99,
"estimatedNrItems" : 1,
"inVariable" : {
"id" : 0,
"name" : "p"
}
}
],
"rules" : [
"use-indexes",
"remove-filter-covered-by-index"
],
"collections" : [
{
"name" : "products",
"type" : "read"
}
],
"variables" : [
{
"id" : 2,
"name" : "1"
},
{
"id" : 0,
"name" : "p"
}
],
"estimatedCost" : 2.99,
"estimatedNrItems" : 1
}
],
"warnings" : [ ],
"stats" : {
"rulesExecuted" : 26,
"rulesSkipped" : 0,
"plansCreated" : 1
},
"error" : false,
"code" : 200
}