wirybeaver commented on PR #1718: URL: https://github.com/apache/datafusion-ballista/pull/1718#issuecomment-4541460753
Closing in favor of porting Spark's `OptimizeSkewedJoin` AQE rule. File-list sharding bails on any hash/single-partition consumer (joins, FinalPartitioned aggregates, global limits), which covers most realistic workloads — including the TPC-H Q2 case this PR aimed to address. Spark's split+replicate pattern handles the highest-value skew shape (skewed joins) directly and is correct by construction. New work will land on branch `optimize-skewed-join`. -- 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]
