用 dbvis 工具连接数据库，报错信息如下：报错的原因就是我要连接的数据库和我现在要使用的数据库驱动版本不匹配。An error occurred while establishing the connection: Long Message: Unknown system variable 'query_cache_size' Details: Type: java.sql.SQLE...

文章 2022-02-17 来自：开发者社区

DbVisualizer 数据库连接工具：添加数据库驱动方法。dbvis搜索不到驱动文件夹下的驱动解决方法

它默认会扫描指定文件夹下的所有驱动，但是有时候即使你放到它的驱动文件夹里也不一定能扫出来。原因有很多种，比如不是常规驱动，或者版本问题等等。这种情况下一般我们都手动添加驱动。步骤一：点击 tools -> driver manager步骤二：然后我们新建一个驱动名，右边的小文件夹图标用来指定文件夹里的驱动。这时候新建一个数据库连接，已经存在的连接可能有一些缓存的问题，比如不能输入 ....

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