[SPARK-32163] Nested pruning should still work for nested column extractors of attributes with cosmetic variations

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.1, 3.1.0
• Component/s: SQL
• Assignee: L. C. Hsieh
• Reporter: L. C. Hsieh
• Created: 03/Jul/20 02:14
• Updated: 08/Jul/20 02:19
• Resolved: 07/Jul/20 18:18

Description

If the expressions extracting nested fields have cosmetic variations like qualifier difference, currently nested column pruning cannot work well.

For example, two attributes which are semantically the same, are referred in a query, but the nested column extractors of them are treated differently when we deal with nested column pruning.

Issue Links

• links to: [Github] Pull Request #28988 (viirya)
• links to: [Github] Pull Request #29027 (viirya)