% improvement when apply shuffle hash join instead of sort
merge join. I wonder if there is still some space to improve shuffle hash join?
Like code generation for ShuffledHashJoinExec or something….
From: Wenchen Fan
Date: Sunday, November 10, 2019 at 5:57 PM
To: "Wang, Gang"
There are some cases, shuffle hash join performs even better than sort merge
join.
While, I noticed that ShuffledHashJoinExec does not implement CodegenSupport,
is there any concern? And if there is any chance to improve the performance of
ShuffledHashJoinExec?
