object WhenNotMatched
The behavior of $merge
if a result document does not match an existing document in the out collection.
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!=(arg0: Any): Boolean
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final
def
==(arg0: Any): Boolean
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val
DISCARD: WhenNotMatched
Discard the document; i.e.
Discard the document; i.e.
$merge
does not insert the document into the output collection. -
val
FAIL: WhenNotMatched
Stop and fail the aggregation operation.
Stop and fail the aggregation operation. Any changes to the output collection from previous documents are not reverted.
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val
INSERT: WhenNotMatched
Insert the document into the output collection.
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