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- Change Events >
- drop Event
drop Event¶
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Synopsis¶
-
drop
¶ New in version 4.0.1.
A
drop
event occurs when a collection is dropped from a database.
Description¶
Field | Type | Description |
---|---|---|
_id |
Document | A BSON object which serves as an identifier for the
change stream event. This value is used as the The For an example of resuming a change stream by |
clusterTime |
Timestamp | The timestamp from the oplog entry associated with the event. Change stream event notifications associated with a
multi-document transaction
all have the same On sharded clusters, events with the same To identify events for a single transaction, you can use the
combination of New in version 4.0. |
lsid |
document | The identifier for the session associated with the transaction. Only present if the operation is part of a multi-document transaction. New in version 4.0. |
ns |
document | The namespace (database and or collection) affected by the event. |
ns.coll |
string | The name of the collection where the event occurred. |
ns.db |
string | The name of the database where the event occurred. |
operationType |
string | The type of operation that the change notification reports. Returns a value of |
txnNumber |
NumberLong | Together with the lsid, a number that helps uniquely identify a transction. Only present if the operation is part of a multi-document transaction. New in version 4.0. |
Example¶
The following example illustrates a drop
event:
A drop
event leads to an invalidate
event for change streams opened
against its own ns
collection.