[SPARK-23199] improved Removes repetition from group expressions in Aggregate

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: caoxuewen
• Reporter: caoxuewen
• Created: 24/Jan/18 03:16
• Updated: 29/Jan/18 16:57
• Resolved: 29/Jan/18 16:57

Description

Currently, all Aggregate operations will go into RemoveRepetitionFromGroupExpressions, but there is no group expression or there is no duplicate group expression in group expression, we not need copy for logic plan.

Issue Links

• links to: [Github] Pull Request #20375 (heary-cao)