[SPARK-35442] Support propagate empty relation through aggregate

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.3.0
• Component/s: SQL
• Assignee: XiDuo You
• Reporter: XiDuo You
• Created: 19/May/21 09:49
• Updated: 27/Jan/22 19:56
• Resolved: 10/Jan/22 12:07

Description

The Aggregate in AQE is different with others, the `LogicalQueryStage` looks like `LogicalQueryStage(Aggregate, BaseAggregate)`. We should handle this case specially.

Logically, if the Aggregate grouping expression is not empty, we can eliminate it safely.

Issue Links

• Blocked: SPARK-35455 Enhance EliminateUnnecessaryJoin
• links to: [Github] Pull Request #35135 (ulysses-you)
• links to: [Github] Pull Request #35135 (ulysses-you)
• links to: [Github] Pull Request #35148 (ulysses-you)
• links to: [Github] Pull Request #35148 (ulysses-you)
• links to: [Github] Pull Request #35149 (ulysses-you)
• links to: [Github] Pull Request #35149 (ulysses-you)