[SPARK-27787] Eliminate uncessary job to compute SSreg

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: ML
• Assignee: Ruifeng Zheng
• Reporter: Ruifeng Zheng
• Created: 21/May/19 06:38
• Updated: 26/May/19 13:19
• Resolved: 26/May/19 13:16

Description

in RegressionMetrics, a job is needed to compute SSreg

However, we only need to agg summary of column prediction, then SSreg can be computed directly based on the summary.

Issue Links

• links to: GitHub Pull Request #24656