[SPARK-32945] Avoid project combination when it will hurst performance

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 3.1.0
• Component/s: SQL
• Assignee: L. C. Hsieh
• Reporter: L. C. Hsieh
• Created: 20/Sep/20 02:24
• Updated: 08/Dec/20 01:11
• Resolved: 08/Dec/20 01:11

Description

In some cases, project combination will hurt performance. We should avoid project combination for that case.

Issue Links

• links to: [Github] Pull Request #29950 (viirya)
• links to: [Github] Pull Request #29950 (viirya)