db.cloneCollection()

发布于 2015-09-14 15:14:17 | 275 次阅读 | 评论: 0 | 来源: 网络整理

db.cloneCollection(from, collection, query)¶

db.cloneCollection() provides a wrapper around cloneCollection for copying data directly between MongoDB instances. db.cloneCollection() does not allow you to clone a collection through a mongos: you must connect directly to the mongod instance.

参数:

参数:	from (string) – A host name, of the MongoDB instance that holds the collection you wish to copy collection (string) – A collection in the MongoDB instance that you want to copy. `db.cloneCollection()` will only copy the collection with this name from database of the same name as the current database the remote MongoDB instance. If you want to copy a collection from a different database name you must use the `cloneCollection` directly. query (document) – Optional. A standard MongoDB query document to limit the documents copied as part of the `db.cloneCollection()` operation.

from (string) – A host name, of the MongoDB instance that holds the collection you wish to copy
collection (string) – A collection in the MongoDB instance that you want to copy. db.cloneCollection() will only copy the collection with this name from database of the same name as the current database the remote MongoDB instance. If you want to copy a collection from a different database name you must use the cloneCollection directly.
query (document) – Optional. A standard MongoDB query document to limit the documents copied as part of the db.cloneCollection() operation.