alippai commented on issue #36709: URL: https://github.com/apache/arrow/issues/36709#issuecomment-1642438044
Using the current unordered hashmap implementation would be the same keys from the same group next to each other? so eg.: ```sql select col, sum(x) from tbl group by 1 ``` ``` C 1 C 3 C 2 A 3 A 2 A 1 B 1 B 2 B 3 ``` This sounds pretty easy to fix just slicing / memcpy the columns. Even using REE for the grouping col is a possibility (and implementing an REE based optimized `take_ranges` or similar). -- 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]
