[SPARK-32337] Show initial plan in AQE plan tree string

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.1.0
• Component/s: SQL
• Assignee: Allison Wang
• Reporter: Allison Wang
• Created: 17/Jul/20 00:44
• Updated: 10/Aug/20 06:02
• Resolved: 10/Aug/20 04:49

Description

Currently the tree string for AdaptiveSparkPlanExec only shows the current physical plan. It would be helpful to also show the initial plan to see the plan change. 

Issue Links

• links to: [Github] Pull Request #29137 (allisonwang-db)