drop

Behavior行为

• Starting in MongoDB 5.0, the drop command and the db.collection.drop() method will raise an error if passed an unrecognized parameter. 从MongoDB 5.0开始，如果传递了无法识别的参数，drop命令和db.collection.drop()方法将引发错误。In MongoDB 4.4 and earlier, unrecognized parameters are silently ignored.在MongoDB 4.4及更早版本中，未识别的参数被默默忽略。
• This command also removes any indexes associated with the dropped collection.此命令还删除与删除的集合关联的所有索引。
• Starting in MongoDB 4.4, the db.collection.drop() method and drop command abort any in-progress index builds on the target collection before dropping the collection. 从MongoDB 4.4开始，db.collection.drop()方法和drop命令在删除集合之前中止在目标集合上构建的任何正在进行的索引。Prior to MongoDB 4.4, attempting to drop a collection with in-progress index builds results in an error, and the collection is not dropped.在MongoDB 4.4之前，尝试删除正在进行索引构建的集合会导致错误，并且不会删除该集合。For replica sets or shard replica sets, aborting an index on the primary does not simultaneously abort secondary index builds. 对于副本集或分片副本集，中止主索引不会同时中止辅助索引生成。MongoDB attempts to abort the in-progress builds for the specified indexes on the primary and if successful creates an associated abortoplog entry. MongoDB尝试中止primary上指定索引的正在进行的构建，如果成功，将创建一个关联的abort日志条目。Secondary members with replicated in-progress builds wait for a commit or abort oplog entry from the primary before either committing or aborting the index build.具有复制的正在进行的构建的Secondary成员在提交或中止索引构建之前，等待来自主数据库的提交或中止oplog条目。
• The drop command and its helper db.collection.drop() create an invalidate Event for any Change Streams opened on the dropped collection.drop命令及其助手db.collection.drop()为已删除集合上打开的任何变更流创建一个invalidate事件。
• Starting in MongoDB 4.0.2, dropping a collection deletes its associated zone/tag ranges.从MongoDB 4.0.2开始，删除集合将删除其关联的区域/标记范围。
• Starting in MongoDB 5.0, the drop command and the db.collection.drop() method return an error if you try to drop a collection in the admin database or the config database from a mongos. 从MongoDB 5.0开始，如果您试图从mongos删除admin数据库或config数据库中的集合，drop命令和db.collection.drop()方法将返回错误。To drop these collections, connect to the config server and run the command there.要删除这些集合，请连接到配置服务器并在那里运行命令。
  Warning警告

  Dropping collections in the admin database or the config database can leave your cluster in an unusable state.删除admin数据库或config数据库中的集合可能会使集群处于不可用状态。