[SPARK-44930] Deterministic ApplyFunctionExpression should be foldable

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.1
• Fix Version/s: 3.5.0
• Component/s: SQL
• Assignee: Xianyang Liu
• Reporter: Xianyang Liu
• Created: 23/Aug/23 08:58
• Updated: 25/Aug/23 07:02
• Resolved: 25/Aug/23 07:02

Description

Currently, ApplyFunctionExpression is unfoldable because inherits the default value from Expression. However, it should be foldable for a deterministic ApplyFunctionExpression. This could help optimize the usage for V2 UDF applying to constant expressions.

Issue Links

• links to: [Github] Pull Request #42629 (ConeyLiu)