[SPARK-41267] Add unpivot / melt to SparkR

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: R, SQL
• Assignee: Maciej Szymkiewicz
• Reporter: Maciej Szymkiewicz
• Created: 25/Nov/22 18:14
• Updated: 12/Dec/22 18:10
• Resolved: 27/Nov/22 02:02

Description

Unpivot / melt operations have been implemented for Scala Dataset and core Python DataFrame, but are missing from SparkR. We should add these to achieve feature parity.

Issue Links

• links to: [Github] Pull Request #38804 (zero323)
• links to: [Github] Pull Request #38804 (zero323)