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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:None
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Fully Compatible
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Query 2018-08-27
Currently, a pipeline stage can indicate whether a foreign namespace is allowed to be sharded but it cannot say which foreign namespace can be sharded. For instance, a $lookup into an unsharded namespace followed by a $out into a sharded namespace is a valid pipeline, however mongos will reject it here.