[SPARK-34620] Code-gen broadcast nested loop join (inner/cross)

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.2.0
• Component/s: SQL
• Assignee: Cheng Su
• Reporter: Cheng Su
• Created: 04/Mar/21 12:22
• Updated: 11/Mar/21 02:30
• Resolved: 09/Mar/21 11:46

Description

`BroadcastNestedLoopJoinExec` does not have code-gen, and we can potentially boost the CPU performance for this operator if we add code-gen for it. https://databricks.com/blog/2017/02/16/processing-trillion-rows-per-second-single-machine-can-nested-loop-joins-fast.html also showed the evidence in one fork.

Issue Links

• links to: [Github] Pull Request #31736 (c21)
• links to: [Github] Pull Request #31736 (c21)