sandeshkr419 opened a new issue, #23815: URL: https://github.com/apache/datafusion/issues/23815
### Is your feature request related to a problem or challenge? `approx_distinct` / `HyperLogLog` hardcodes precision at `p=14` (16384 registers, 16 KiB per sketch). There is currently no way for callers to trade accuracy for lower memory or smaller partial-aggregate state on the wire. ### Describe the solution you'd like Request is to add `HyperLogLog::with_precision(p)` and `ApproxDistinct::with_hll_precision(p)` so that integrators can request a smaller sketch (e.g. p=12 → 4 KiB, ~1.6% error) without changing the default behaviour. **Note**: This does not affects non-approx paths which use bitmap for exact distinct count. ### Describe alternatives you've considered _No response_ ### Additional context _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
