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Type:
Task
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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None
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Query Optimization
- $elemMatch children can be simplified as independent Boolean expressions, then the result could be attached to the parent's BitsetTree. We will need to modify `restoreMatchExpression` function to handle that case.
- In the $elemMatch's parent's conjunction contains the same terms as the $elemMatch's conjunction we can remove the terms from the $elemtMatch's conjunction. E.g.
{ "a": {"id":1}, "a":{$elemMatch:{"id":1, "b":9} } } == { "a": {"id":1}, "a":{$elemMatch:{"b":9} } }see
SERVER-22857
- is related to
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SERVER-78260 Contained $or rewrite optimization incorrectly lifts a negation predicate outside an $elemMatch leading to missing query results
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- Closed
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- related to
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SERVER-22857 eliminate redundant conditions/clauses from query
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- Closed
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- split from
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- Closed
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