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Type:
Task
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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Labels:None
The format of an Aggregate Explain response has been changed.
Before we had:
{
"stages": [{
"$cursor": {
"query": {},
"fields": {
"x": 1,
"_id": 1
},
"queryPlanner": {
"plannerVersion": 1,
"namespace": "Tests11051524.MongoCollectionTests",
"indexFilterSet": false,
"parsedQuery": {},
"queryHash": "8B3D4AB8",
"planCacheKey": "8B3D4AB8",
"winningPlan": {
"stage": "COLLSCAN",
"direction": "forward"
},
"rejectedPlans": []
}
}
}, {
"$project": {
"_id": true,
"x": "$x"
}
}
],
"ok": 1.0
}
, but now all latests servers return:
{
"queryPlanner": {
"plannerVersion": 1,
"namespace": "Tests11051512.MongoCollectionTests",
"indexFilterSet": false,
"parsedQuery": {},
"queryHash": "8B3D4AB8",
"planCacheKey": "8B3D4AB8",
"optimizedPipeline": true,
"winningPlan": {
"stage": "PROJECTION_DEFAULT",
"transformBy": {
"_id": true,
"x": "$x"
},
"inputStage": {
"stage": "COLLSCAN",
"direction": "forward"
}
},
"rejectedPlans": []
},
"serverInfo": {
"host": "EPBYMINW3653",
"port": 27017,
"version": "4.3.0-2014-g8010c51",
"gitVersion": "8010c51d3f1cc1020959f8b351f8242d141d42a3"
},
"ok": 1.0
}
can be related to this ticket: https://jira.mongodb.org/browse/SERVER-38691