[Feature] 数据源粒度可以细化到数据库，当前权限粒度太粗

[David-liuchangyu]

描述需求
当前数据源粒度到mysql集群的粒度，只要赋予这个权限，在当前mysql集群中所有的数据库都可以进行访问，一般不符合公司对数据管理要求，举个例子：订单库和库存库都在一个集群里面，订单组pg 申请查询权限后，同时会赋予集群中所有库的权限，一般企业不会允许这么干

你的思路
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截图
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Title: [Feature] The data source granularity can be refined to the database, the current permission granularity is too coarse

Describe requirements
The granularity of the current data source is that of the MySQL cluster. As long as this permission is granted, all databases in the current MySQL cluster can be accessed. This generally does not meet the company's data management requirements. For example: the order database and the inventory database are both in the same cluster. Inside, after the order group pg applies for query permissions, it will also be given permissions for all libraries in the cluster. Generally, companies will not allow this.

your thoughts
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screenshot
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