Dandandan commented on issue #50: URL: https://github.com/apache/arrow-datafusion/issues/50#issuecomment-1597373205
FYI @metesynnada I'm working on a prototype. Translated the code out of https://dare.uva.nl/search?identifier=5ccbb60a-38b8-4eeb-858a-e7735dd37487 to this, which seems roughly equivalent: ```rust let mut to_check: Vec<(u64, usize)> = hash_values .iter() .enumerate() .flat_map(|(row, hash_value)| { build_hashmap .map .get(*hash_value, |(hash, _)| *hash_value == *hash) .map(|(_, v)| (*v - 1, row)) }) .collect(); while to_check.len() > 0 { // Perform column-wise (vectorized) equality check // check next items to_check = to_check .iter() .flat_map(|(index, row)| { let next = build_hashmap.next[*index as usize]; (next != 0).then(|| (next - 1, *row)) }) .collect(); } ``` -- 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]
