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Type: Improvement
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Resolution: Duplicate
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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
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None
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Query
$lookup is currently analogous to a left-outer-join, in some cases, i have come across a requirement for a full-outer-join, and i think this could be a valuable enhancement.
see this stack-overflow question for additional background
- duplicates
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SERVER-23201 provide union operator to union two collections (or more)
- Closed