MongoCollectionmapreduce()

Runs a Map Reduce command

Usage

BOOLEAN = MongoCollectionmapreduce(
				
					
					
						datasource, 
					
				
					
					
						collection, 
					
				
					
					
						map, 
					
				
					
					
						reduce, 
					
				
					
					
						outputcollection, 
					
				
					
					
						type, 
					
				
					
					
						query, 
					
				
					
					
						finalize
					
				
				)

Argument	Summary
datasource	datasource name. Name previously created using MongoRegister
collection	collection name
map	map function in javascript code
reduce	reduce function in javascript code
outputcollection	name of the collection to put the results
type	the type of output; MERGE (Merge the job output with the existing contents of outputTarget collection), REDUCE (Save the job output to a collection, replacing its previous content), REPLACE (Reduce the job output with the existing contents of outputTarget collection) (default REPLACE) [optional]
query	query to use on input [optional]
finalize	finalize function in javascript code [optional]

Calling

Supports named-parameter calling allowing you to use the function like:

MongoCollectionmapreduce(
   datasource=?, 
   collection=?, 
   map=?, 
   reduce=?, 
   outputcollection=?, 
   type=?, 
   query=?, 
   finalize=?
);

Supports passing parameters as a structure using ArgumentCollection:

MongoCollectionmapreduce( ArgumentCollection={
   datasource : ?, 
   collection : ?, 
   map : ?, 
   reduce : ?, 
   outputcollection : ?, 
   type : ?, 
   query : ?, 
   finalize : ?
} );

Extra

For more information on using MongoDB, visit the MongoCFML page

For functions that update data, you can pass in the writeconcern. The possible values are:

FSYNC_SAFE
Exceptions are raised for network issues, and server errors; the write operation waits for the server to flush the data to disk
JOURNAL_SAFE
Exceptions are raised for network issues, and server errors; the write operation waits for the server to group commit to the journal file on disk
MAJORITY
Exceptions are raised for network issues, and server errors; waits on a majority of servers for the write operation
NONE
No exceptions are raised, even for network issues
NORMAL
Exceptions are raised for network issues, but not server errors
REPLICAS_SAFE
Exceptions are raised for network issues, and server errors; waits for at least 2 servers for the write operation
SAFE
Exceptions are raised for network issues, and server errors; waits on a server for the write operation

MongoCollectionaggregate MongoCollectioncount MongoCollectiondistinct MongoCollectiondrop MongoCollectionfind MongoCollectionfindandmodify MongoCollectionfindone MongoCollectiongroup MongoCollectionindexdrop MongoCollectionindexensure MongoCollectioninsert MongoCollectionlist MongoCollectionmapreduce MongoCollectionremove MongoCollectionrename MongoCollectionsave MongoCollectionstats MongoCollectionupdate MongoDatabasedrop MongoDatabaselist MongoDatabaseruncmd MongoDatabasestats MongoDeregister MongoGridfsfind MongoGridfsfindone MongoGridfsget MongoGridfsremove MongoGridfssave MongoIsvalid MongoObjectid MongoRegister

MongoCollectionmapreduce()

Usage

Calling

Extra

See Also