Metabase Bi
Metabase连接mysql5.6.16-log版本数据库报错：Unknown system variable ‘session_track_schema’
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情况一：Metabase启动数据库为mysql5.6.16
启动直接报错，启动失败
Metabase在启动时报错session_track_schema，日志文件如下：
情况二：添加数据源mysql5.6.16
如果数据源是这个版本也会同样的问题：
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这个问题是数据库版本导致的，你看一下详细查看Metabase github的issue：9483的讨论
关于这个问题Metabase上的issue特别的多，而且容易看晕，最后终于在找到了一个解决办法，亲测可用
最终解决方案，你可以看一下（见issue：9954）：
分析原因-session-track-schema
至于MariaDB是MySQL 的一个 branch，还是MariaDB 是 MySQL 的一个fork先不讨论，不过它俩似乎一直就存在兼容性的问题，Metabase MySQL/MariaDB driver是mariadb-java-client这个包。
Metabase不支持Alibaba RDS MySQL 5.6.16-log，因为在0.32.0版本中更改为MariaDB Connector/J，因为旧MySQL不支持session-track-schema。
后来发现就是这个5.6.16-log这个小版本有问题，目前其他的版本未发现存在问题。
解决办法-mariadb-java-client包
首先确定Metabase使用的MySQL/MariaDB driver版本，到project下面
需要下载源码包：mariadb-java-client-2.3.0-sources.jar（Metabase当前版本用的这个版本）
Metabase Bioinformatics
编译完替换就重新启动即可，也可以直接下载我编译完的 AbstractConnectProtocol.class