关于OpentsdbReader 如何写入关系型数据库

您好，我想问下 opentsdbReader 相关的问题，在 job.json 的 read中 ， column 字段配置的是 "metric" 的值，当清洗到关系型数据库例如 mysql 中，writer 中的 column 只能填写 "metric" 一列吗，可以拆分 datapoint 变成四个字段插入 mysql 中吗？很困惑，望解答！

Start with the OpentsdbReader configuration in the job.json read section and the MySQL writer's column handling. Trace how the metric/datapoint value moves between reader and writer, then determine whether the existing mapping supports splitting it into four fields. Done means documenting the supported configuration or defining the required change clearly.

Written by the indexing model from the issue text.