return BSON regular expressions as BSONRegExp instances.
Allow driver to bypass schema validation in MongoDB 3.2 or higher.
the serializer will check if keys are valid.
A user-provided comment to attach to this command
Specifies the verbosity mode for the explain output.
allow to specify if there what fields we wish to return as unserialized raw buffer.
serialize will not emit undefined fields (default:true)
It is possible to make the execution stay in JS. Provided in MongoDB > 2.0.X.
Keep temporary data.
Number of objects to return from collection.
Sets the output target for the map reduce job.
when deserializing a Binary will return it as a node.js Buffer instance.
when deserializing a Long will fit it into a Number if it's smaller than 53 bits
when deserializing will promote BSON values to their Node.js closest equivalent types.
Query filter object.
Return BSON filled buffers from operations
Specify a read concern and level for the collection. (only MongoDB 3.2 or higher supported)
The preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).
Should retry failed writes
Can pass in variables that can be access from map/reduce/finalize.
Specify ClientSession for this command
Sorts the input objects using this key. Useful for optimization, like sorting by the emit key for fewer reduces.
Provide statistics on job execution time.
Write Concern as an object
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