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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Querying
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Labels:None
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ALL
In the sample session below, the document will be returned if you queried using the full range, but if you split the query into 2 parts, you will never get the document as part of the result.
> db.user.insert({ y: 1 });
> db.user.ensureIndex({ x: 1 });
> db.user.find({ x: { $gte: MinKey, $lt: MaxKey }})
{ "_id" : ObjectId("53ee2d5188dc69e2793b705b"), "y" : 1 }
> db.user.find({ x: { $gte: 0, $lt: MaxKey }})
> db.user.find({ x: { $gte: MinKey, $lt: 0 }})
> db.user.find({ x: { $gte: MinKey, $lt: MaxKey }}).explain()
{
"cursor" : "BtreeCursor x_1",
"isMultiKey" : false,
"n" : 1,
"nscannedObjects" : 1,
"nscanned" : 1,
"nscannedObjectsAllPlans" : 1,
"nscannedAllPlans" : 1,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 0,
"indexBounds" : {
"x" : [
[
{
"$minElement" : 1
},
{
"$maxElement" : 1
}
]
]
},
"server" : "ren-desktop:27017"
}
> db.user.find({ x: { $gte: MinKey, $lt: 0 }}).explain()
{
"cursor" : "BtreeCursor x_1",
"isMultiKey" : false,
"n" : 0,
"nscannedObjects" : 0,
"nscanned" : 0,
"nscannedObjectsAllPlans" : 0,
"nscannedAllPlans" : 0,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 0,
"indexBounds" : {
"x" : [
[
-Infinity,
0
]
]
},
"server" : "ren-desktop:27017"
}
> db.user.find({ x: { $gte: 0, $lt: MaxKey }}).explain()
{
"cursor" : "BtreeCursor x_1",
"isMultiKey" : false,
"n" : 0,
"nscannedObjects" : 0,
"nscanned" : 0,
"nscannedObjectsAllPlans" : 0,
"nscannedAllPlans" : 0,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 0,
"indexBounds" : {
"x" : [
[
0,
Infinity
]
]
},
"server" : "ren-desktop:27017"
}