[IMPALA-8707] Consider adding local aggregation step for mt_dop plans

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Backend
• Labels: multithreading
• Epic Link: Multi-threaded query execution - Further Enhancements
• Target Version: Product Backlog
• Epic Color: ghx-label-4
• Assignee: Unassigned
• Reporter: Tim Armstrong
• Created: 25/Jun/19 18:39
• Updated: 01/Jun/20 19:08

Description

We could do a extra local aggregation in cases where it would reduce the amount of data sent across the network.