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db.aggregate()
MongoDB Driver Function Reference
Runs an (admin/diagnostic) aggregation that does not require a collection.
More information can be found in the corresponding entry of the MongoDB Manual.
db.aggregate([<pipeline>[, <options>]])
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Arguments
<pipeline> | | An array of BSON documents specifying the aggregation pipline |
<options> | | A BOSN document specifying options |
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Options
{ allowDiskUse: <boolean>, batchSize: <int>, comment: <string>, maxAwaitTime: <long>,
collation: <document>, hint: <document>, bypass }
allowDiskUse | | Allows to write to disk while executing |
batchSize | | Sets the batch size. |
bypassDocumentValidation | | Document validation will be bypassed (default; false) |
comment | | Sets the comment. |
maxAwaitTime | | Sets the maximum await time (in milliseconds). |
collation | | A document specifying the collation |
hint | | A document specifying a hint |
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Return Value
Returns a result set (cursor).
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Example
db.aggregate([{ $currentOp : { allUsers: true, idleConnections: true } }, { $match : { shard: "shard01" } }]);
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Runs the currentOp operation and filters the results.
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