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Type: Task
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Aggregation Framework
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Labels:
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Fully Compatible
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Query 2020-03-23
As part of SERVER-43860, a new useNewUpsert flag was added to the aggregate command to facilitate smooth upgrade/downgrade, since certain 4.2 versions supported this behaviour and others did not. When we branch for 4.5, this flag will no longer be necessary and should be removed. AggregationRequest will continue to ingest it for upgrade purposes, but should simply swallow it.