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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Aggregation Framework
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ALL
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3
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Given an index on {a:1, b:1, c:1}, the following aggregations could make use of it to run more efficiently
db.foo.aggregate([{$group: {_id: "$a", b_sum: {$sum: '$b'}}}])
db.foo.aggregate([{$group: {_id: {a: "$a", b: "$b"}, c_sum: {$sum: '$c'}}}])
And other similar aggregations
- duplicates
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SERVER-11447 aggregation can sort using index to speed up group of an indexed field
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- Closed
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