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[question] get_metrics获取执行plan的实现原理? #95

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@ChenLiaoyuan

get_metrics获取执行plan的实现原理是怎样的?
目前是否是提前定义好metrics的PromQL / Elasticsearch DSL / SQL模板,然后再把实体过滤、字段映射代入?

后续可以定义好指标,无需配置模板,自动解析出plan吗?
因为过滤、分组、聚合、关联子表等情况感觉难以通过单一的模板定义

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