Details
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Improvement
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Resolution: Unresolved
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Major - P3
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None
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3.2.10
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Query Optimization
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(copied to CRM)
Description
Given documents of the form
{
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_id: ObjectId("..."), |
a: "2016-08-07", |
...
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b: 2222,
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c: 3333
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...
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},
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{
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_id: ObjectId("..."), |
a: "2016-08-07" |
c: 4444,
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...
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},
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{
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_id: ObjectId("..."), |
a: "2016-08-07", |
...
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b: 4444,
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c: 5555
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...
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},
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And a partial index of the form
db.foo.createIndex({a: -1, b: 1}, partialFilterExpression: {b: {$exists: true}}) |
The query planner can use this index to fully cover a query of the following form:
db.foo.find({a: { $lte: '2016-08-11' }, b: {$exists: true}}, {_id: 0, a: 1}) |
Attachments
Issue Links
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- Closed
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