2010YOUY01 opened a new issue, #23318: URL: https://github.com/apache/datafusion/issues/23318
### Is your feature request related to a problem or challenge? Part of https://github.com/apache/datafusion/issues/22710 Follow up to https://github.com/apache/datafusion/pull/23309 ### Describe the solution you'd like For ordered aggregation, we can likely simplify the implementation in a similar way to #23309. The ordered aggregation case can be split into two variants: * **Fully ordered input**: the input is ordered by `(a, b)`, and the query groups by `(a, b)` * **Partially ordered input**: the input is ordered by `a`, and the query groups by `(a, b)` For the partially ordered variant, we should still use regular hash aggregation, with the early-emit optimization. For the fully ordered variant, there may be a deeper optimization that avoids the hash table entirely. This refactor is probably easier after we first add the fast path for the fully ordered case. 🤔 ### 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]
