wForget commented on PR #6017:
URL: https://github.com/apache/kyuubi/pull/6017#issuecomment-1911288073
> The difference with hint is that, we can change it's output.
I might prefer to split it into two tasks:
1. add a hint to inject observer
2. provide getObservedMetrics method to obtain metrics
like:
```
Call getObservedMetrics(
SELECT /*+ OBSERVE('observer1', sum(c1), count(1)) */ * from t1
)
```
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