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Type: Improvement
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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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Query Execution
We should consider validating the $merge whenMatched pipeline sooner. Currently, it does not get parsed until execution time UNLESS the $merge stage is serialized for query settings/query stats (at which point the pipeline is parsed and re-serialized in the serialize() function).
This doesn't manifest in any kind of user-facing bug but isn't ideal behavior, as it is odd to have the parsing error first be seen when serializing the stage (effectively making serialize() have side effects).
- is related to
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SERVER-94818 Parse $geoNear query in DocumentSourceGeoNear constructor
- Closed
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SERVER-96850 Pipeline nested within $merge isn't validated to parse OK until runtime
- In Progress