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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 2.2.1, 2.2.3
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Component/s: Querying
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None
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Environment:linux 64 bit
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Linux
I've created the following document for testing purposes:
{
"_id" : ObjectId("512b405b20ce3b931d06d9ed"),
"calls" : [
{
"ts" : 123456,
"n" : 100
},
{
"ts" : 123457,
"n" : 200
}
],
"query" : [
"shopId",
"clusterId",
"abc3"
]
}
Using the $all operator finds the document but does not return it:
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } )
Using $and however returns correctly the document (just to proof that it really exits):
shard01:PRIMARY> db.test.find( { $and: [ {query:"shopId"}, {query:"clusterId"}, {query:"abc3"} ] } )
{ "_id" : ObjectId("512b405b20ce3b931d06d9ed"), "calls" : [ { "ts" : 123456, "n" : 100 }, { "ts" : 123457, "n" : 200 } ], "query" : [ "shopId", "clusterId", "abc3" ] }
It seems that $all found the document since n is 1:
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).explain()
{
"cursor" : "BtreeCursor query_1",
"isMultiKey" : true,
"n" : 1,
"nscannedObjects" : 5,
"nscanned" : 5,
"nscannedObjectsAllPlans" : 5,
"nscannedAllPlans" : 5,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 0,
"indexBounds" : {
"query" : [
[
"shopId",
"shopId"
]
]
},
"server" : "ws21109:27002"
}
However, find returns nothing and findOne returns null:
shard01:PRIMARY> db.test.findOne( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } )
null
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).size()
1
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).count()
1
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).forEach(function(u){print(u)})
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).pretty()
However when I add .showDiskLoc, the document is shown correctly:
shard01:PRIMARY> db.test.find( { query: { $all: [ "shopId", "clusterId", "abc3" ] } } ).showDiskLoc()
{ "_id" : ObjectId("512b405b20ce3b931d06d9ed"), "calls" : [ { "ts" : 123456, "n" : 100 }, { "ts" : 123457, "n" : 200 } ], "query" : [ "shopId", "clusterId", "abc3" ], "$diskLoc" : { "file" : 0, "offset" : 7162144 } }
shard01:PRIMARY>
The same happens when queried through the java driver, hasNext will be false.
- duplicates
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- Closed
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