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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: 3.4.2
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Component/s: Querying
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Labels:None
Documents with two fields: {sort:..,x:...}
Index on {sort:1,x:1}
The query on "x" sorted by the sort field doesn't detect proper index bounds for x:
> db.test.find({x:{$gte:1,$lte:3}}).sort({sort:1}).explain("executionStats").executionStats.executionStages.inputStage.indexBounds
{ "sort" : [ "[MinKey, MaxKey]" ], "x" : [ "[MinKey, MaxKey]" ] }
However, adding an all-inclusive condition on "sort" into the query fixes the problem:
> db.test.find({sort:{$gte:MinKey},x:{$gte:1,$lte:3}}).sort({sort:1}).explain("executionStats").executionStats.executionStages.inputStage.indexBounds
{ "sort" : [ "[MinKey, MaxKey]" ], "x" : [ "[1.0, 3.0]" ] }
- duplicates
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SERVER-13197 Tighten index bounds and allow compound index to be chosen when predicate on leading field is not provided
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- Backlog
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