[SPARK-37564] Support sort aggregate code-gen without grouping keys

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: SQL
• Assignee: Cheng Su
• Reporter: Cheng Su
• Created: 07/Dec/21 05:13
• Updated: 17/Dec/21 12:18
• Resolved: 17/Dec/21 12:18

Description

We can support `SortAggregateExec` code-gen without grouping keys. When there's no grouping key, sort aggregate should share same execution logic with hash aggregate. Refactor the code-gen without grouping keys, from `HashAggregateExec` to a base class `AggregateCodegenSupport`, and `SortAggregateExec` can share the same implementation by extending `AggregateCodegenSupport`.

The implementation of `SortAggregateExec` code-gen with grouping keys will be added in follow-up PR.

Issue Links

• links to: [Github] Pull Request #34826 (c21)