mongodb 里有类似 mysql 的 information_schema 这种存储元数据的数据库吗
听说以前的版本有 system.namespaces system.indexes,4.2 版本后取消了,现在应该在哪找呢?
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zxCoder OP 英文好难理解啊
MongoDB stores system information in collections that use the <database>.system.* namespace, which MongoDB reserves for internal use. Do not create collections that begin with system. 文档这说的是 <database>.system.* namespace 这些 collection 只用于内部使用? root 角色也不能查吗 |
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yonng 2020-12-05 10:26:51 +08:00 via iPhone
看文档描述是预留的防止冲突不让用而已,和 root 没啥关系
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echowuhao 2020-12-05 10:39:38 +08:00
你打开 mongo shell 试试不就可以了么。。。
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echowuhao 2020-12-05 10:41:39 +08:00
<database>.system.namespaces
REMOVED IN 4.2 Starting in MongoDB 4.2, <database>.system.namespaces has been removed (access to the collection has been deprecated since 3.0). To list the collections in a database, use the listCollections command instead. <database>.system.indexes REMOVED IN 4.2 Starting in MongoDB 4.2, <database>.system.indexes has been removed (access to the collection has been deprecated since 3.0). To list the inndexes, use the listIndexes command instead. listCollections listIndexes 文档写好的。你只要 google 一下。 |