Jackie-Jiang opened a new pull request, #8655:
URL: https://github.com/apache/pinot/pull/8655
- Allow broker to automatically rewrite expensive function to its
approximate counterpart
- DISTINCT_COUNT -> DISTINCT_COUNT_SMART_HLL
- PERCENTILE -> PERCENTILE_SMART_TDIGEST
- Add table level override for the rewrite through the query config
## Release-Notes
Add broker config `pinot.broker.use.approximate.function` to turn the
feature on (off by default)
Add query config `useApproximateFunction` to override the broker level config
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