[SPARK-32308] Move by-name resolution logic of unionByName from API code to analysis phase

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.1.0
• Component/s: SQL
• Assignee: L. C. Hsieh
• Reporter: L. C. Hsieh
• Created: 14/Jul/20 16:43
• Updated: 24/Jul/20 04:33
• Resolved: 24/Jul/20 04:33

Description

Currently the by-name resolution logic of unionByName is put in API code. We should move the logic to analysis phase.

Issue Links

• is related to: SPARK-29358 Make unionByName optionally fill missing columns with nulls
• links to: [Github] Pull Request #29107 (viirya)
• links to: [Github] Pull Request #29107 (viirya)