Interface ChangeStreamDropDatabaseDocument

The id functions as an opaque token for use when resuming an interrupted change stream.id用作不透明标记，用于恢复中断的更改流。

The timestamp from the oplog entry associated with the event. 与事件关联的oplog条目的时间戳。For events that happened as part of a multi-document transaction, the associated change stream notifications will have the same clusterTime value, namely the time when the transaction was committed. 对于作为多文档事务的一部分发生的事件，关联的更改流通知将具有相同的clusterTime值，即事务提交的时间。On a sharded cluster, events that occur on different shards can have the same clusterTime but be associated with different transactions or even not be associated with any transaction. 在分片集群上，发生在不同分片上的事件可以具有相同的clusterTime，但与不同的事务关联，甚至不与任何事务关联。To identify events for a single transaction, you can use the combination of lsid and txnNumber in the change stream event document.要识别单个事务的事件，可以在变更流事件文档中使用lsid和txnNumber的组合。

The identifier for the session associated with the transaction. 与事务关联的会话的标识符。Only present if the operation is part of a multi-document transaction.仅当操作是多文档事务的一部分时才存在。

The transaction number. Only present if the operation is part of a multi-document transaction.事务记录编号。仅当操作是多文档事务的一部分时才存在。