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Type:
Improvement
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Resolution: Unresolved
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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Query Optimization
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This ticket was originally to write a PBT that runs queries targeted to hit the new $expr-splitting optimization from SERVER-106505.
However, it’s clear that a more general PBT testing $match-splitting optimizations more generally would be beneficial. This PBT would compare the results of those queries when running against a server with optimizations enabled and a server with optimizations disabled.
We could start by implementing this PBT to specifically cover $match splitting past a renaming stage. The queries could have a computing/renaming operation following by a $match, For example:
[{$project|$group|$addFields: {...}}, {$match: {...}}]
- is related to
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SERVER-112772 $expr predicates can be incorrectly pushed down before a $group, causing incorrect query results
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- Open
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- Closed
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- Backlog
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- Closed
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