而线上分属三个。我的代码里

线下线上最大的区别就是线下几个库是同一个MySql实例，而线上分属三个。我的代码里，疑点最大的是查询元数据metaData.getTables()这段。

好巧不巧，在我排查的第一阶段和第二阶段中间，我写了一个迁移表的功能，完全新写了查询表名的代码，并且为了不再犯物理库和逻辑库搞混的错误，特别地写了对应的工具类：

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