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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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Affects Version/s: 2.4.4, 2.5.3
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Component/s: Querying
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Environment:Ubuntu 12.04 (64 bit)
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Linux
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3
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With reference to the attached dataset test9371.json imported into a collection 'zips' (on mongodb 2.4.4 and mongodb 2.5.3),
when we run the following query :
db.zips.aggregate( { $group:
{ _id: { state: "$state", city: "$city" },
zipcount : {$sum : 1},
pop: { $sum: "$pop" } } },
{ $sort: { zipcount: 1 } },
{ $group:
{ _id : "$_id.state",
biggestCity: { $last: "$_id.city" },
population: { $last: "$pop" },
zipcount : { $last : "$zipcount"}
} } ,{ $sort : {population : -1}})
different results are returned on mongodb 2.4.4 (pls refer to attached results_244.png) and mongodb 2.5.3.(pls refer results_253.png).
Could you please investigate whats causing this discrepancy? Thank you
