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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: Aggregation Framework, Sharding
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None
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Query Optimization
In cases where there is no merge stage (or we are before it), it may be possible to allow self-lookup on sharded collection if the local and foreign field is the same and it's the shard key.
- depends on
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SERVER-29159 Allow "from" collection of $lookup to be sharded
- Closed
- is related to
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SERVER-28705 Add optimization to execute $lookup on local shards when possible
- Closed